---
title: "All tools"
description: "Browse free, private tools that run entirely in your browser - no uploads, no sign-up."
url: https://candoya.com/tools/
locale: en
type: tool-directory
---

# All tools

Browse free, private tools that run entirely in your browser - no uploads, no sign-up.

## [Text & Writing](https://candoya.com/tools/text/)

Count words, format, clean up and transform text.

- [Add Line Breaks](https://candoya.com/tools/add-line-breaks/): Add line breaks to text by separator, sentence, word or word count. Format lists and paragraphs instantly in your browser with no upload.
- [Add Line Numbers](https://candoya.com/tools/add-line-numbers/): Add line numbers to text online with custom starts, increments, styles and zero-padding. Blank lines stay intact, and your text stays private.
- [Anagram Solver](https://candoya.com/tools/anagram-solver/): Use this free anagram solver to unscramble letters into exact anagrams and shorter English words. Add wildcards and filters, all in your browser.
- [Business Name Generator](https://candoya.com/tools/business-name-generator/): Generate brandable business name ideas free online. Type a keyword, pick a style, and get short company, startup and brand names with matching .com domains. Runs in your browser.
- [Case Converter](https://candoya.com/tools/case-converter/): Free online case converter. Convert text to UPPERCASE, lowercase, Title Case, Sentence case, Capitalize Words, aLtErNaTiNg or iNvErSe in your browser.
- [Camel Case Converter](https://candoya.com/tools/camel-case-converter/): Free camel case converter for text, snake_case, kebab-case and PascalCase. Convert live to camelCase or PascalCase in your browser.
- [Character Counter](https://candoya.com/tools/character-counter/): Free online character counter to count characters with and without spaces instantly. Live limits for X, SMS and meta descriptions. Runs in your browser.
- [Email Extractor](https://candoya.com/tools/email-extractor-from-text/): Free email extractor from text, HTML, logs, or notes. Remove duplicates, sort, lowercase, and copy a clean list privately in your browser.
- [Find and Replace](https://candoya.com/tools/find-and-replace/): Find and replace text online with case, whole-word and regex controls. Preview every change instantly, then copy the result. Free and private.
- [Kebab Case Converter](https://candoya.com/tools/kebab-case-converter/): Free kebab case converter for text, camelCase, PascalCase and messy identifiers. Convert live to kebab-case for slugs and code.
- [Lorem Ipsum Generator](https://candoya.com/tools/lorem-ipsum-generator/): Free lorem ipsum generator. Create placeholder paragraphs, sentences, words or list items instantly, copy as plain text or HTML. No sign-up.
- [Line Counter](https://candoya.com/tools/line-counter/): Free online line counter to count total, non-empty and blank lines instantly. Paste text and get line length stats in your browser.
- [Markdown to Plain Text](https://candoya.com/tools/markdown-to-plain-text/): Convert Markdown to plain text instantly. Remove headings, emphasis, links, tables and code fences while keeping readable content in your browser.
- [Morse Code Translator](https://candoya.com/tools/morse-code-translator/): Free Morse code translator. Convert text to Morse code and Morse to text instantly, with a full alphabet chart. Runs in your browser - nothing uploaded.
- [NATO Phonetic Alphabet Converter](https://candoya.com/tools/nato-phonetic-alphabet/): Free NATO phonetic alphabet converter for names, callsigns and serial numbers. Spell text as Alfa Bravo Charlie instantly in your browser.
- [Palindrome Checker](https://candoya.com/tools/palindrome-checker/): Use this free palindrome checker to test words, phrases and numbers instantly. Adjust spaces, punctuation, case and accents in your browser.
- [Paragraph Counter](https://candoya.com/tools/paragraph-counter/): Free online paragraph counter to count paragraphs in your text plus words, sentences and average paragraph length. Runs in your browser - nothing uploaded.
- [Pascal Case Converter](https://candoya.com/tools/pascal-case-converter/): Free Pascal case converter for text, camelCase, snake_case and kebab-case. Convert live to PascalCase in your browser.
- [Readability Score Checker](https://candoya.com/tools/readability-score/): Free readability checker: paste any text and see Flesch Reading Ease, Flesch-Kincaid grade level, Gunning Fog, SMOG, ARI and Coleman-Liau live. Runs in your browser.
- [Reading Time Calculator](https://candoya.com/tools/reading-time-estimator/): Free reading time calculator: paste any text, pick a reading speed, see how long it takes to read in minutes. Counts words and book pages too. Runs in your browser.
- [Remove All Spaces](https://candoya.com/tools/remove-all-spaces/): Remove all spaces from text online, including tabs and Unicode spacing. Preserve line breaks or strip every whitespace character. Fast and private.
- [Remove Duplicate Lines](https://candoya.com/tools/remove-duplicate-lines/): Free online duplicate line remover. Paste a list, delete repeated lines instantly and keep the original order. No sign-up - text stays in your browser.
- [Remove Extra Spaces](https://candoya.com/tools/remove-extra-spaces/): Remove extra spaces from text instantly. Clean double spaces, tabs and uneven line edges while keeping paragraphs. Free and browser-based.
- [Remove Line Breaks](https://candoya.com/tools/remove-line-breaks/): Free line break remover for text, PDF copy and email wraps. Join lines, keep paragraphs or make one line. Private and browser-based.
- [Remove Line Numbers](https://candoya.com/tools/remove-line-numbers/): Remove line numbers from text online in real time. Clean numbered lists, code and transcripts while preserving line breaks and indentation.
- [Reverse Each Word](https://candoya.com/tools/reverse-each-word/): Reverse each word online while keeping word order, spaces and line breaks intact. Unicode-aware, free, instant and processed in your browser.
- [Reverse Text](https://candoya.com/tools/reverse-text/): Free online text reversal tool to reverse characters, words, lines or word order instantly. No sign-up, no download - runs in your browser.
- [Reverse Word Order](https://candoya.com/tools/reverse-word-order/): Reverse word order online while keeping every word readable, punctuation attached and spacing intact. Free, instant and processed in your browser.
- [Sort Lines Alphabetically](https://candoya.com/tools/sort-lines-alphabetically/): Sort lines alphabetically online in A-Z or Z-A order. Handle case, natural numbers, spaces, empty lines and duplicates privately in your browser.
- [Sort Lines by Length](https://candoya.com/tools/sort-lines-by-length/): Sort lines by length online from shortest to longest or longest to shortest. Clean blanks and duplicates privately with live Unicode-aware results.
- [Sort Lines Numerically](https://candoya.com/tools/sort-lines-numerically/): Sort lines numerically online by the first number in each row. Handle negatives, decimals and scientific notation with private, instant results.
- [Sentence Counter](https://candoya.com/tools/sentence-counter/): Free online sentence counter to count sentences with longest, shortest and average length stats. Runs in your browser - nothing uploaded.
- [Snake Case Converter](https://candoya.com/tools/snake-case-converter/): Free snake case converter for text, camelCase, PascalCase and messy identifiers. Convert live to snake_case or SCREAMING_SNAKE_CASE.
- [Slogan Generator](https://candoya.com/tools/slogan-generator/): Generate catchy slogan and tagline ideas free online. Type a keyword, pick a style, and get dozens of ready-to-use slogans for your business, brand or campaign. Runs in your browser.
- [Smart Quotes Converter](https://candoya.com/tools/smart-quotes-converter/): Smart quotes converter for curly and straight quotation marks. Fix pasted text for publishing, code or JSON instantly in your browser.
- [Speaking Time Calculator](https://candoya.com/tools/speaking-time-estimator/): Free speaking time calculator: paste text, pick a pace, see how long it takes to read aloud. Words to minutes, instantly. Runs in your browser, no sign-up.
- [Syllable Counter](https://candoya.com/tools/syllable-counter/): Free syllable counter to estimate syllables in English words, poems, and text by line. Get instant per-word results privately in your browser.
- [Text Diff Checker](https://candoya.com/tools/text-diff/): Free online text diff and compare tool. Paste two texts and see line-by-line and word-level differences in your browser, with ignore-case and ignore-whitespace options.
- [Text Repeater](https://candoya.com/tools/text-repeater/): Repeat text online up to 10,000 times with new lines, spaces, commas or a custom separator. Add numbering and copy the result instantly.
- [Text Statistics Dashboard](https://candoya.com/tools/text-statistics-dashboard/): Analyze text statistics instantly: words, characters, structure, vocabulary, timing, and frequent terms in one private browser dashboard.
- [URL Slug Generator](https://candoya.com/tools/text-to-slug/): Free slug generator: convert any text or title to a clean, SEO-friendly URL slug instantly. Bulk mode, hyphen or underscore - runs in your browser.
- [Trim Whitespace](https://candoya.com/tools/trim-whitespace/): Trim whitespace from text or every line. Remove leading and trailing spaces, tabs and Unicode spacing while preserving internal formatting.
- [URL Extractor](https://candoya.com/tools/url-extractor/): Free URL extractor to pull links from text, HTML, logs, or notes instantly. Remove duplicates, sort results, or list domains. No upload or sign-up.
- [Whitespace Visualizer](https://candoya.com/tools/whitespace-visualizer/): Reveal spaces, tabs, line endings and invisible Unicode characters in text. Inspect indentation and trailing whitespace privately in your browser.
- [Username Generator](https://candoya.com/tools/username-generator/): Generate cool random usernames free online. Pick a style, separator and length, then copy a handle for Instagram, Discord, Roblox or gaming. Runs in your browser.
- [Word Counter](https://candoya.com/tools/word-counter/): Free online word counter to count words, characters & sentences instantly. No sign-up, no download - your text stays in your browser.
- [Word Frequency Counter](https://candoya.com/tools/word-frequency-counter/): Free word frequency counter to rank repeated words, counts and percentages instantly. Paste text and analyze it privately in your browser.
- [Business Card Maker](https://candoya.com/tools/business-card-maker/): Free online business card maker with live preview, print-ready sizes and private browser autosave. No sign-up or upload needed.
- [Online Habit Tracker](https://candoya.com/tools/habit-tracker/): Free online habit tracker that saves in your browser. Add habits, tick the days you did them, and watch your streaks grow. No sign-up, no app, nothing uploaded.
- [Kanban Board](https://candoya.com/tools/kanban-board/): Use a free online Kanban board to organize tasks with drag and drop. No sign-up: your private board saves only in this browser.
- [Online Notepad](https://candoya.com/tools/quick-notepad/): Free online notepad that autosaves in your browser. Jot notes, get a live word and character count, then copy or download as .txt. No sign-up, no upload.
- [Recipe Scaler](https://candoya.com/tools/recipe-scaler/): Free recipe scaler to resize a full ingredient list for any serving count. Handles mixed fractions and ranges, with no sign-up or upload.
- [Tournament Bracket Generator](https://candoya.com/tools/tournament-bracket-generator/): Create a free single-elimination tournament bracket for 2 to 32 players. Seed or shuffle, handle byes, advance winners, copy, and print locally.

## [Images](https://candoya.com/tools/image/)

Compress, convert, resize and crop - no upload.

- [Add Watermark](https://candoya.com/tools/add-watermark/): Add a text or logo watermark to an image online. Preview position, opacity, size, rotation and tiling, then download privately in your browser.
- [App Icon Generator](https://candoya.com/tools/app-icon-generator/): Generate iOS, Android and Web app icon sizes from one image. Download organized PNG packs with Xcode and PWA metadata, privately in your browser.
- [Background Remover](https://candoya.com/tools/background-remover/): Remove a photo background with private on-device AI. Export a full-size transparent PNG with no image upload, account, or usage credits.
- [Circle Crop](https://candoya.com/tools/circle-crop/): Circle crop an image into a round profile photo with a draggable frame and transparent PNG download. Private, free, and no upload required.
- [Dominant Color Finder](https://candoya.com/tools/dominant-color-finder/): Find the dominant color in any image and copy its HEX, RGB, or HSL value. Fast local analysis for photos, logos, and screenshots.
- [EXIF Metadata Viewer](https://candoya.com/tools/exif-metadata-viewer/): View EXIF metadata, camera settings, dates, and GPS coordinates in photos. Inspect every tag locally without uploading your image.
- [Face Blur Anonymizer](https://candoya.com/tools/face-blur-anonymizer/): Blur faces online with private on-device detection. Review each face, choose blur, pixelation, or blackout, then download a protected PNG.
- [Flip Image](https://candoya.com/tools/flip-image/): Flip images horizontally, vertically, or both axes. Mirror PNG, JPG, or WebP files instantly in your browser with no upload required.
- [Grayscale Converter](https://candoya.com/tools/grayscale-converter/): Convert images to grayscale online with adjustable strength and multiple luminance methods. Choose PNG, JPEG, or WebP output - all processing happens in your browser.
- [Image Color Palette Extractor](https://candoya.com/tools/image-color-palette-extractor/): Extract a color palette from any image and copy HEX, RGB, HSL, or CSS values. Fast local analysis for photos, logos, and screenshots.
- [Image Color Picker](https://candoya.com/tools/image-color-picker/): Pick an exact color from any image and copy HEX, RGB, HSL, alpha, and pixel coordinates. Private Canvas sampling with zoom and a pixel loupe.
- [Image Compressor](https://candoya.com/tools/image-compressor/): Compress images online with private browser processing, quality controls, visual previews, and clear file-size savings. No upload or sign-up.
- [Image Cropper](https://candoya.com/tools/image-cropper/): Crop images online with a draggable frame, ratio presets, exact pixels, and private PNG, JPG, or WebP download. No upload or watermark.
- [Image Diff Checker](https://candoya.com/tools/image-diff-compare/): Compare two images online with overlay, split view, and pixel difference highlighting. Adjust tolerance and export the result privately in your browser.
- [Image Dimensions Checker](https://candoya.com/tools/image-dimensions-checker/): Check image dimensions, pixel size, aspect ratio, megapixels and file size instantly. Your image stays private in your browser.
- [Image Histogram](https://candoya.com/tools/image-histogram/): View an image histogram online with RGB and luminance channels, clipping stats, and CSV or PNG export. Your photo stays in your browser.
- [Image to ASCII Art](https://candoya.com/tools/image-to-ascii-art/): Convert an image to ASCII art online with adjustable width, contrast, brightness and character sets. Copy or download private text art instantly.
- [Image to WebP](https://candoya.com/tools/image-to-webp/): Convert images to WebP online with adjustable quality, side-by-side previews, exact size savings, and private browser processing. No upload.
- [Image Resizer](https://candoya.com/tools/image-resizer/): Resize images online to exact pixel dimensions with aspect lock, presets, preview, and private PNG, JPG, or WebP download.
- [Image Upscaler](https://candoya.com/tools/image-upscaler/): Upscale an image 2x with real on-device Swin2SR AI. Compare detail and export PNG or JPEG without uploading your photo or creating an account.
- [JPG to PNG](https://candoya.com/tools/jpg-to-png/): Convert JPG to PNG online with original dimensions, side-by-side preview, exact file sizes, and private browser processing. No upload or sign-up.
- [Image to Text](https://candoya.com/tools/ocr-image-to-text/): Convert an image to editable text with private multilingual browser OCR. Copy or export the result with no image upload, account, or watermark.
- [Passport Photo Maker](https://candoya.com/tools/passport-photo-maker/): Make a passport-size photo with common presets, manual framing, and exact pixel output. Private browser processing with no upload or watermark.
- [Pixelate Image](https://candoya.com/tools/pixelate-image/): Pixelate an image online with adjustable block size, live comparison, and full-resolution PNG, JPG, or WebP export in your browser.
- [Signature Pad](https://candoya.com/tools/signature-pad/): Use this signature pad online to draw with a mouse, finger, or stylus, then copy or download a cropped transparent PNG. Nothing is uploaded.
- [Steganography Text Hider](https://candoya.com/tools/steganography-hide-text/): Hide text in an image with private, browser-based steganography. Embed UTF-8 messages in pixels and download a lossless PNG with no upload.
- [PNG to ICO](https://candoya.com/tools/png-to-ico/): Convert PNG to ICO online with multiple icon sizes in one file. Preserve transparency, preview every frame, and download privately in your browser.
- [PNG to JPG](https://candoya.com/tools/png-to-jpg/): Convert PNG to JPG online with adjustable JPEG quality, a custom transparency background, private browser processing, and instant download.
- [QR Code Decoder](https://candoya.com/tools/qr-code-decoder/): Decode a QR code from an image or screenshot online. Read links, text, Wi-Fi details, and more locally in your browser with no upload or sign-up.
- [Rotate Image](https://candoya.com/tools/rotate-image/): Rotate images online by 90, 180, 270, or any custom angle. Preview and download PNG, JPG, or WebP files privately in your browser.
- [WebP to PNG](https://candoya.com/tools/webp-to-png/): Convert WebP to PNG online with transparency, original dimensions, side-by-side previews, and private browser processing. No upload or sign-up.

## [PDF](https://candoya.com/tools/pdf/)

Merge, split, convert and compress PDF files.

- [Add Blank Page to PDF](https://candoya.com/tools/add-blank-page-to-pdf/): Add blank pages to a PDF online at any position. Match the nearby page, choose A4 or Letter, and download privately with no upload or sign-up.
- [Add PDF Page Numbers](https://candoya.com/tools/add-page-numbers-to-pdf/): Add page numbers to a PDF online for free. Choose the position, range, first number, font size, format, and margin without uploading your file.
- [PDF Watermark](https://candoya.com/tools/add-watermark-to-pdf/): Add a text or image watermark to a PDF online for free. Control pages, position, size, rotation, color, and opacity without uploading your file.
- [Booklet Maker](https://candoya.com/tools/booklet-maker/): Make a print-ready PDF booklet with correct two-up page order. Add blanks automatically, preview each side, and process the file privately.
- [Certificate Generator](https://candoya.com/tools/certificate-generator/): Create up to 30 personalized certificates in one printable PDF. Choose a template, add names and download privately with no watermark.
- [Crop PDF](https://candoya.com/tools/crop-pdf/): Crop PDF pages online by trimming exact margins in millimetres. Preview the result, choose page ranges, and download privately with no upload.
- [Delete PDF Pages](https://candoya.com/tools/delete-pdf-pages/): Delete PDF pages online with visual thumbnails and page ranges. Remove unwanted pages locally, keep original quality, and download with no upload or sign-up.
- [Duplicate PDF Pages](https://candoya.com/tools/duplicate-pdf-pages/): Duplicate PDF pages online with visual thumbnails, page ranges, copy counts, and flexible placement. Your PDF stays local with no upload or sign-up.
- [PDF Metadata Editor](https://candoya.com/tools/edit-pdf-metadata/): Edit PDF metadata such as title, author, subject, keywords, creator, producer, and dates online. Download a private, updated copy with no upload.
- [Extract Text by Page](https://candoya.com/tools/extract-text-by-page/): Extract text from PDF pages in your browser. Inspect, edit, copy or download each page separately while the original PDF stays on your device.
- [PDF Form Data Extractor](https://candoya.com/tools/extract-pdf-form-data/): Extract PDF form data privately in your browser. Review AcroForm field names, values, types, and options, then export clean JSON or CSV.
- [Extract PDF Pages](https://candoya.com/tools/extract-pdf-pages/): Extract PDF pages into a new document online. Choose single pages or ranges, keep original quality, and download privately without uploading your file.
- [PDF Form Filler](https://candoya.com/tools/fill-pdf-form/): Fill a PDF form online for free. Complete standard AcroForm text, checkbox, radio, and choice fields privately, then download your PDF.
- [Image to PDF](https://candoya.com/tools/image-to-pdf/): Convert JPG, PNG, and WebP images to one PDF free. Reorder pages, choose A4 or Letter, set margins, and download without uploading your files.
- [Merge PDF Files](https://candoya.com/tools/merge-pdf/): Merge PDF files into one document free, right in your browser. No upload, no sign-up, no file limits - combine PDFs in any order and download instantly.
- [N-up PDF](https://candoya.com/tools/n-up-pdf/): Create an N-up PDF with 2, 4, 6, 9, or 16 pages per sheet. Choose A4 or Letter, preview the grid, and download privately with no upload.
- [Password Protect PDF](https://candoya.com/tools/password-protect-pdf/): Password protect a PDF with real AES-256 encryption in your browser. Add an opening password and reader permissions with no upload or sign-up.
- [PDF to Text](https://candoya.com/tools/pdf-to-text/): Convert PDF to text free in your browser. Extract selectable text from digital PDFs, preview it, copy it or download a TXT file without uploading.
- [PDF Link Extractor](https://candoya.com/tools/pdf-link-extractor/): Extract links from a PDF privately in your browser. Find clickable URLs, email addresses, internal destinations, and printed links with page numbers.
- [PDF Page Counter](https://candoya.com/tools/pdf-page-counter/): Count pages in one PDF or a whole batch online. See per-file totals, combined pages, averages, and CSV results without uploading your documents.
- [PDF Page Size Checker](https://candoya.com/tools/pdf-page-size-detector/): Check PDF page size online in points, inches and millimetres. Find A4, Letter, mixed sizes, orientation and rotation privately in your browser.
- [PDF Word Counter](https://candoya.com/tools/pdf-word-counter/): Count words in a PDF privately in your browser. See words, characters, sentences, reading time and per-page totals without uploading the document.
- [PDF to Image](https://candoya.com/tools/pdf-to-image/): Convert PDF pages to PNG, JPG, or WebP images free. Choose page ranges, resolution, and quality, then download locally with no file upload.
- [QR Code to PDF](https://candoya.com/tools/qr-code-to-pdf/): Turn links, IDs, or text into a printable QR code PDF sheet. Choose A4 or Letter, grid size, captions, and download locally with no sign-up.
- [Redact PDF](https://candoya.com/tools/redact-pdf/): Redact PDF pages online by drawing permanent black boxes. Export a flattened copy locally in your browser with no file upload or sign-up.
- [Reorder PDF Pages](https://candoya.com/tools/reorder-pdf-pages/): Reorder PDF pages online with clear thumbnails, drag controls, and keyboard buttons. Save a private, full-quality PDF locally with no upload or sign-up.
- [Resize PDF Pages](https://candoya.com/tools/resize-pdf-pages/): Resize PDF pages to A4, Letter, Legal or custom dimensions. Fit, fill or stretch every page privately in your browser with no file upload.
- [Rotate PDF](https://candoya.com/tools/rotate-pdf/): Rotate PDF pages online for free in your browser. Turn all, odd, even, or selected pages without uploads, quality loss, watermarks, or sign-up.
- [PDF Signer](https://candoya.com/tools/sign-pdf/): Sign a PDF online by drawing and placing your signature on any page. Download the signed copy without uploading the document or creating an account.
- [Split PDF](https://candoya.com/tools/split-pdf/): Split PDF pages into separate files free in your browser. Preview pages, choose exact ranges, and download without uploads, watermarks, or sign-up.

## [Developer](https://candoya.com/tools/dev/)

Format, encode, validate and generate code.

- [Base64 Encode and Decode](https://candoya.com/tools/base64-encode-decode/): Free online Base64 encoder and decoder. Convert text to Base64 and back instantly, with full Unicode and URL-safe support. No upload, runs in your browser.
- [CIDR Range Calculator](https://candoya.com/tools/cidr-range-calculator/): Convert an IPv4 or IPv6 range to the smallest exact CIDR list, or expand a CIDR block to its first and last address. Free and private.
- [Cron Expression Builder](https://candoya.com/tools/cron-expression-builder/): Build and validate standard 5-field cron expressions online. Get a plain-language schedule preview and next run times in UTC.
- [Cron Expression Explainer](https://candoya.com/tools/cron-expression-explainer/): Paste a five-field cron expression and read its plain-English meaning, field breakdown and next UTC run times instantly in your browser.
- [CSS Clamp Calculator](https://candoya.com/tools/css-clamp-calculator/): Free CSS clamp calculator for fluid typography and responsive spacing. Generate clamp(), slope, intercept and copyable CSS in your browser.
- [CSS Formatter](https://candoya.com/tools/css-formatter/): Free CSS formatter to beautify minified or messy stylesheets online. Choose indentation, check structure, copy or download CSS in your browser.
- [CSS Minifier](https://candoya.com/tools/css-minifier/): Free CSS minifier to compress stylesheets online. Remove comments and extra whitespace, measure bytes saved, then copy or download locally.
- [CSV to JSON Converter](https://candoya.com/tools/csv-to-json/): Convert CSV to JSON online with header, delimiter and type controls. Handles quoted commas and multiline fields privately in your browser.
- [CSV to YAML Converter](https://candoya.com/tools/csv-to-yaml/): Free online CSV to YAML converter. Paste CSV and get clean YAML instantly, with header keys, type detection and auto delimiter. Runs in your browser.
- [NanoID Generator](https://candoya.com/tools/nanoid-generator/): Generate secure, URL-friendly NanoID unique IDs online. Pick the length, alphabet and quantity, copy in one click. Runs in your browser, nothing uploaded.
- [IEEE 754 Float Converter](https://candoya.com/tools/ieee-754-float-converter/): IEEE 754 converter for 32-bit floats and 64-bit doubles. Convert decimal to hex or binary, decode raw bits, and inspect every field locally.
- [Number Base Converter](https://candoya.com/tools/number-base-converter/): Free number base converter. Convert between binary, octal, decimal and hexadecimal instantly, plus any base from 2 to 36. Runs in your browser.
- [ULID Generator](https://candoya.com/tools/ulid-generator/): Generate ULIDs online in bulk. Create sortable 26-character Crockford Base32 IDs, copy one or all, and keep monotonic order. Runs in your browser.
- [Unicode Character Lookup](https://candoya.com/tools/unicode-character-lookup/): Look up any Unicode character or code point. See its name, U+ value, decimal number, UTF-8, UTF-16, HTML, JavaScript, and CSS encodings.
- [Clipboard Inspector](https://candoya.com/tools/clipboard-inspector/): Free clipboard inspector to see every format on your clipboard - plain text, HTML, images and custom types - with byte sizes and previews. Runs in your browser.
- [HTML Entity Encode and Decode](https://candoya.com/tools/html-entity-encode-decode/): Free online HTML entity encoder decoder. Escape HTML special characters, decode named and numeric entities, and copy the result.
- [HTML Formatter](https://candoya.com/tools/html-formatter/): Free HTML formatter to beautify HTML documents and fragments with readable indentation. Handles HTML5 structure and runs in your browser.
- [HTML Minifier](https://candoya.com/tools/html-minifier/): Free HTML minifier to compress markup, remove comments and measure exact byte savings. Preserves sensitive content and runs in your browser.
- [IPv4 Subnet Calculator](https://candoya.com/tools/ipv4-subnet-calculator/): IPv4 subnet calculator for network, broadcast, masks, usable host range, and capacity. Enter any IP with CIDR or subnet mask; results stay private.
- [ISBN Validator](https://candoya.com/tools/isbn-validator/): Free online ISBN validator for ISBN-10 and ISBN-13. Check digits, normalize hyphens, handle X and see clear invalid reasons.
- [JavaScript Beautifier](https://candoya.com/tools/js-beautifier/): Free JavaScript beautifier to format messy or minified JS online. Tune indentation, braces and line wrapping without uploading your code.
- [JSON Formatter](https://candoya.com/tools/json-formatter/): Free online JSON formatter to beautify, validate and minify JSON instantly. No sign-up, no upload - your JSON stays in your browser.
- [JSON Minifier](https://candoya.com/tools/json-minifier/): Free online JSON minifier to compress JSON to one compact line and see exactly how many bytes you saved. No sign-up, no upload - your JSON stays in your browser.
- [JSON Schema Validator](https://candoya.com/tools/json-schema-validator/): Validate JSON data against a JSON Schema online. See every failed rule with its exact data path. Free, private and no sign-up required.
- [JSON to CSV Converter](https://candoya.com/tools/json-to-csv/): Free online JSON to CSV converter. Paste a JSON array or object and get downloadable CSV instantly. Private, no upload, no sign-up.
- [JSON to XML Converter](https://candoya.com/tools/json-to-xml/): Free JSON to XML converter for nested objects, arrays and attributes. Get clean, well-formed XML instantly without uploading your data.
- [JSON to YAML Converter](https://candoya.com/tools/json-to-yaml/): Free online JSON to YAML converter. Paste JSON and get clean, block-style YAML instantly, with 2 or 4 space indent. Runs entirely in your browser.
- [JSON Validator](https://candoya.com/tools/json-validator/): Free online JSON validator to check syntax, locate errors and preview formatted JSON. No sign-up, no upload - your data stays in your browser.
- [JWT Decoder](https://candoya.com/tools/jwt-decoder/): Decode JWT tokens online to inspect headers, payload claims, expiry times and signature segments locally in your browser.
- [JWT Generator](https://candoya.com/tools/jwt-generator/): Free online JWT generator for HS256 and unsigned debug tokens. Edit header and claims locally, then copy a compact token.
- [LESS to CSS](https://candoya.com/tools/less-to-css/): LESS to CSS converter powered by Less.js. Compile variables, nesting, mixins and functions locally, then copy or download clean CSS.
- [Markdown Table Generator](https://candoya.com/tools/markdown-table-generator/): Build a Markdown table in a visual grid or convert CSV and spreadsheet data. Set column alignment, preview it live, and copy clean Markdown.
- [Markdown to HTML](https://candoya.com/tools/markdown-to-html/): Convert Markdown to HTML instantly with GitHub tables, task lists, code blocks and a safe preview. Copy or download the result without uploading text.
- [XML Formatter](https://candoya.com/tools/xml-formatter/): Free online XML formatter to beautify, validate and minify XML in your browser. No upload, no sign-up.
- [XML Minifier](https://candoya.com/tools/xml-minifier/): Free XML minifier to remove formatting whitespace and optional comments, validate structure and measure exact byte savings in your browser.
- [XML to JSON Converter](https://candoya.com/tools/xml-to-json/): Free XML to JSON converter for attributes, repeated elements, namespaces and CDATA. Get formatted JSON instantly without uploading your data.
- [YAML Formatter](https://candoya.com/tools/yaml-formatter/): Free online YAML formatter to validate and clean up YAML with comments, anchors and block strings. Runs in your browser.
- [YAML to JSON Converter](https://candoya.com/tools/yaml-to-json/): Convert YAML to JSON online with live validation, multi-document support and clean formatting. Your config stays in your browser.
- [YAML Validator](https://candoya.com/tools/yaml-validator/): Free online YAML validator to check syntax, find line and column errors, preview valid YAML and keep config text in your browser.
- [SCSS to CSS](https://candoya.com/tools/scss-to-css/): SCSS to CSS converter powered by Dart Sass. Compile variables, nesting, mixins and modules locally, then copy or download clean CSS.
- [SHA-256 Hash Generator](https://candoya.com/tools/sha-256-hash/): Free online SHA-256 hash generator. Hash any text or file to a 64-character digest instantly, as hex or Base64. No upload - runs in your browser.
- [SQL Formatter](https://candoya.com/tools/sql-formatter/): Free SQL formatter to beautify queries with dialect-aware indentation and keyword casing. Your database code stays in your browser.
- [TOML to JSON](https://candoya.com/tools/toml-to-json/): Convert TOML to JSON online with live validation, clean formatting and safe handling for dates and large integers. Your config stays in your browser.
- [URL Encode and Decode](https://candoya.com/tools/url-encode-decode/): Free online URL encoder and decoder. Convert text to percent-encoding and back instantly, with full Unicode support. No upload, runs in your browser.
- [Query String Builder](https://candoya.com/tools/query-string-builder/): Free query string builder for encoded URL parameters, arrays, blank values, and full links. Create and copy the result privately in your browser.
- [Query String Parser](https://candoya.com/tools/query-string-parser/): Free query string parser. Decode URL parameters, keep duplicate keys, edit values, and rebuild a query string or full URL in your browser.
- [Regex Tester](https://candoya.com/tools/regex-tester/): Test JavaScript regular expressions online with live matches, capture groups and replacement previews. Your patterns and text stay in your browser.
- [Screen Resolution Detector](https://candoya.com/tools/screen-resolution-detector/): Free screen resolution detector. See your screen size, viewport, device pixel ratio, orientation, color depth and browser display facts locally.
- [SVG Optimizer](https://candoya.com/tools/svg-optimizer/): Free SVG optimizer to minify vector files with SVGO, compare exact byte savings and preview the result. Files stay in your browser.
- [URL Parser](https://candoya.com/tools/url-parser/): Free online URL parser. Paste any URL to split it into scheme, host, port, path, query parameters, and fragment instantly. Runs in your browser, nothing uploaded.
- [User-Agent Parser](https://candoya.com/tools/user-agent-parser/): Parse a User-Agent string into browser, engine, OS, device, CPU, and crawler details. Free, instant, and processed in your browser.
- [UUID Generator (v4 & v7)](https://candoya.com/tools/uuid-generator/): Generate UUID v4 and time-ordered UUID v7 identifiers online. Bulk up to 1000, uppercase or no-hyphen format, one-click copy. Runs in your browser.
- [Chart Maker](https://candoya.com/tools/chart-maker/): Make bar, line, and pie charts online from your own labels and values. Customize colors, preview live, and export PNG or SVG with no sign-up.
- [CSV Editor](https://candoya.com/tools/csv-editor/): Edit CSV files online in a spreadsheet-style table. Add rows or columns, fix values, then copy or download clean CSV without uploading data.
- [CSV Filter](https://candoya.com/tools/csv-filter/): Filter CSV rows by column values, numbers, dates or booleans. Combine rules, preview matches and export a clean CSV privately in your browser.
- [CSV Column Extractor](https://candoya.com/tools/csv-column-extractor/): Extract and reorder CSV columns by heading or position. Preview, copy, and download private UTF-8 CSV while quoted cells stay intact.
- [CSV Deduplicator](https://candoya.com/tools/csv-deduplicate/): Remove duplicate rows from CSV by any column or combination. Keep the first or last match, preview changes, and download locally.
- [CSV Diff](https://candoya.com/tools/csv-diff/): Compare CSV files by a shared key and find added, removed, or changed rows. Review cell-level differences and export a private local report.
- [CSV Merger](https://candoya.com/tools/csv-merger/): Merge CSV files online by stacking rows and aligning headers. Reorder, preview, copy, and download locally with no upload or sign-up.
- [CSV Sorter](https://candoya.com/tools/csv-sorter/): Sort CSV rows by one or more columns as text, numbers, or dates. Preview, copy, and download the result privately in your browser.
- [CSV Splitter](https://candoya.com/tools/csv-splitter/): Split CSV files by row count, equal parts, or column value. Keep headers, preview every part, and download a private local ZIP without uploads.
- [CSV Statistics](https://candoya.com/tools/csv-statistics/): Calculate CSV statistics for every column, including missing values, uniques, quartiles, mean, median and standard deviation, in your browser.
- [CSV to Chart](https://candoya.com/tools/csv-to-chart/): Turn CSV into bar, line, or pie charts online. Paste or upload data, choose columns, then download SVG or PNG. Your data stays in your browser.
- [CSV to Markdown Table](https://candoya.com/tools/csv-to-markdown-table/): Convert CSV to a Markdown table with live preview, delimiter detection, alignment, safe escaping, copy, and download. Your data stays in your browser.
- [CSV to XML Converter](https://candoya.com/tools/csv-to-xml/): Free CSV to XML converter for clean, well-formed XML with custom tags and delimiters. Paste CSV, copy or download XML, all in your browser.
- [CSV Viewer](https://candoya.com/tools/csv-viewer/): Open CSV and TSV files in a clean, searchable table. Sort columns, page through rows, copy or download a filtered view, all in your browser.
- [Histogram Maker](https://candoya.com/tools/histogram-maker/): Make a histogram online from pasted numbers or a CSV column. Compare automatic bins, frequency, density, and cumulative views, then export PNG, SVG, or CSV.
- [JSON Flatten](https://candoya.com/tools/json-flatten/): Flatten nested JSON into dot-path keys instantly. Choose separators and array notation, then copy clean flat JSON. Free, private, and browser-based.
- [Pivot Table](https://candoya.com/tools/pivot-table/): Create pivot tables from CSV data instantly. Summarize rows and columns, aggregate values by sum, count, average, min or max, and export as CSV or Markdown - all in your browser.
- [SQL Playground](https://candoya.com/tools/sql-playground/): Run SQL online in a private SQLite playground with sample data, instant result tables, CSV export, and no sign-up. Everything stays in your browser.
- [SQLite Browser](https://candoya.com/tools/sqlite-browser/): Open SQLite files in a private online viewer. Browse tables and schema, run read-only SQL, and export CSV without uploading your database.
- [AES Encrypt and Decrypt](https://candoya.com/tools/aes-encrypt-decrypt/): Encrypt and decrypt text with AES-256-GCM online. Password-based, authenticated, and private in your browser with no upload or sign-up.
- [File Hash Calculator](https://candoya.com/tools/file-hash/): File hash calculator for SHA-256, SHA-512, SHA-1 and MD5 checksums. Verify any local file privately with drag and drop - no upload.
- [Caesar Cipher](https://candoya.com/tools/caesar-cipher/): Free online Caesar cipher tool. Encode and decode text with any shift (0-25), try ROT13, or brute-force all shifts to crack unknown ciphers. Runs in your browser.
- [HMAC Generator](https://candoya.com/tools/hmac-generator/): Free online HMAC generator to compute message authentication codes with SHA-1, SHA-256, SHA-384 or SHA-512. No sign-up, no download - runs in your browser.
- [IBAN Validator](https://candoya.com/tools/iban-validator/): Validate an IBAN online by country, length and MOD-97 checksum. Get clear error details while your bank number stays in your browser.
- [Passphrase Generator](https://candoya.com/tools/passphrase-generator/): Generate a secure random passphrase from EFF words. Adjust length and separators, see honest entropy, and copy it locally in your browser.
- [Password Generator](https://candoya.com/tools/password-generator/): Generate strong random passwords free online. Pick the length and symbols, see entropy and crack time, copy in one click. Runs in your browser.
- [Password Strength Meter](https://candoya.com/tools/password-strength-meter/): Check password strength with pattern-aware scoring, crack-time estimates, and useful feedback. Analysis runs locally in your browser.
- [PBKDF2 Derive](https://candoya.com/tools/pbkdf2-derive/): PBKDF2 generator to derive hex or Base64 keys from a password with configurable salt, hash, iterations and length. Runs locally in your browser.
- [Rail Fence Cipher](https://candoya.com/tools/rail-fence-cipher/): Free online rail fence cipher tool. Encrypt and decrypt text with any number of rails, see the zigzag pattern, and copy the result. Runs in your browser.
- [RSA Key Pair Generator](https://candoya.com/tools/rsa-key-pair-generator/): Generate RSA key pairs online in PEM or JWK format with 2048, 3072, or 4096-bit keys. WebCrypto runs locally, so private keys stay on your device.
- [Shamir Secret Sharing](https://candoya.com/tools/secret-sharing-shamir/): Split a secret into threshold shares with Shamir secret sharing, then recover it from any sufficient subset. Runs locally in your browser.
- [SHA-384 Hash Generator](https://candoya.com/tools/sha-384-hash/): Generate a SHA-384 hash from text or a file in your browser. Copy a 96-character hex or Base64 digest and compare checksums privately.
- [TOTP Code Generator](https://candoya.com/tools/totp-code-generator/): Generate a current TOTP or 2FA code from a Base32 secret in your browser. RFC 6238 checked, memory-only, with no upload, storage, or sign-up.
- [QR Code Generator](https://candoya.com/tools/qr-code-generator/): Free QR code generator for links and text. Download PNG or SVG, pick colors and size - runs in your browser, no sign-up, and codes never expire.

## [Converters](https://candoya.com/tools/convert/)

Convert units, files, time zones and currencies.

- [BTU to kW Converter](https://candoya.com/tools/btu-to-kw/): Convert BTU to kW for heating and cooling capacity. Enter BTU/h and get kilowatts, watts and refrigeration tons instantly in your browser.
- [Data Storage Converter](https://candoya.com/tools/data-storage-converter/): Convert data storage units instantly between bits, bytes, KB, MB, GB, TB and IEC units such as KiB, MiB and GiB. Free and private in your browser.
- [PPI Calculator](https://candoya.com/tools/dpi-ppi-calculator/): PPI calculator for screens and images. Enter resolution and diagonal size to find pixel density, pixel pitch, megapixels and physical dimensions.
- [Area Converter](https://candoya.com/tools/area-converter/): Free area converter for square meters, square feet, acres, hectares and other metric or imperial units. See every conversion instantly.
- [Energy Converter](https://candoya.com/tools/energy-converter/): Convert energy units instantly between joules, kWh, calories, BTU, therms and electronvolts, with exact factors and an all-units table.
- [Temperature Converter](https://candoya.com/tools/temperature-converter/): Free temperature converter for Celsius, Fahrenheit and Kelvin. Type a value and get all three scales at once, with the formula shown - instant, no sign-up, runs in your browser.
- [Length Converter](https://candoya.com/tools/length-converter/): Free length and distance converter. Enter a value and convert instantly between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles and more - runs in your browser.
- [Meters to Feet Converter](https://candoya.com/tools/meters-to-feet/): Free meters to feet converter. Type a length in meters and get feet, plus the exact feet and inches - instant, no sign-up, runs in your browser.
- [Pressure Converter](https://candoya.com/tools/pressure-converter/): Free pressure converter for PSI, bar, Pa, kPa, MPa, atm, Torr, mmHg and more. Convert live with an all-units table in your browser.
- [Speed Converter](https://candoya.com/tools/speed-converter/): Free speed and velocity converter. Enter a value and convert instantly between km/h, mph, m/s, feet per second, knots and Mach - runs in your browser, nothing uploaded.
- [Volume Converter](https://candoya.com/tools/volume-converter/): Free volume converter for liters, milliliters, gallons, cups, fluid ounces, cubic meters, cubic inches and cubic feet. Runs in your browser.
- [Weight Converter](https://candoya.com/tools/weight-converter/): Free weight converter for kilograms, pounds, ounces, stones, grams and tons. Get exact live results and mixed formats in your browser.
- [Age Calculator](https://candoya.com/tools/age-calculator/): Free age calculator: enter a date of birth to get your exact age in years, months and days, plus age in weeks, days, hours - and your next birthday.
- [Business Days Calculator](https://candoya.com/tools/business-days-calculator/): Free business days calculator. Count the working days between two dates, skip weekends, and exclude your own public holidays. Runs in your browser.
- [Calendar Generator](https://candoya.com/tools/calendar-generator/): Free calendar generator for any month and year. Choose Sunday or Monday starts, add notes and week numbers, then print a clean calendar in your browser.
- [Countdown Timer](https://candoya.com/tools/countdown-timer/): Free online countdown timer with alarm. Set any duration in minutes or hours, then start, pause and reset. Runs in your browser - no sign-up, no download.
- [Date Calculator](https://candoya.com/tools/date-calculator/): Free date calculator to add or subtract days, weeks, months and years from any date. Instant, private and accurate for month-end dates.
- [Day of Week Finder](https://candoya.com/tools/day-of-week-finder/): Find the day of the week for any past or future date. See its ISO week, day of year, month occurrence, and leap-year status instantly.
- [ISO Date Converter](https://candoya.com/tools/iso-date-converter/): Convert and validate ISO 8601 dates in your browser. Normalize offsets to UTC, inspect date parts, and copy local, UTC, or Unix values instantly.
- [Days Between Dates Calculator](https://candoya.com/tools/days-between-dates/): Free days between dates calculator. Count the exact number of days between two dates, with a years, months, and days breakdown and an include-end-date option. Runs in your browser.
- [Meeting Time Planner](https://candoya.com/tools/meeting-time-planner/): Meeting time planner for finding shared working hours across time zones. Compare up to six people with DST-aware local times. No sign-up.
- [Pomodoro Timer](https://candoya.com/tools/pomodoro-timer/): Free online Pomodoro timer with 25-minute focus sessions, short and long breaks, custom intervals, alarms, and daily progress saved in your browser.
- [Recurring Date Calculator](https://candoya.com/tools/recurring-date-calculator/): Recurring date calculator to generate daily, weekly, monthly or yearly schedules. Handle month ends, list up to 200 dates and copy the results.
- [Time Between Two Times Calculator](https://candoya.com/tools/time-between-two-times/): Free calculator for the time between two times. Enter a start and end time to get the hours and minutes between them - overnight spans handled, all in your browser.
- [Time Duration Calculator](https://candoya.com/tools/time-duration-calculator/): Calculate the exact time duration between two dates and times in days, hours, minutes and seconds. Handles overnight and multi-day ranges in your browser.
- [Time Zone Converter](https://candoya.com/tools/timezone-converter/): Free time zone converter for meetings, calls and travel. Compare cities instantly with DST-aware offsets. No sign-up or upload.
- [Unix Timestamp Converter](https://candoya.com/tools/unix-timestamp-converter/): Convert Unix timestamps to human-readable dates and back, free in your browser. Auto-detects seconds vs milliseconds and shows UTC, local time and ISO 8601.
- [Working Hours Calculator](https://candoya.com/tools/working-hours-calculator/): Working hours calculator for weekly shifts, unpaid breaks, overnight work and decimal totals. Add up to 14 shifts privately in your browser.

## [Color & Design](https://candoya.com/tools/color/)

Pick colors, convert formats, check contrast.

- [Accessible Palette Generator](https://candoya.com/tools/accessible-palette-generator/): Generate a role-based accessible color palette from brand and background colors. Check WCAG AA and AAA contrast, preview roles, and copy CSS.
- [Color Blindness Simulator](https://candoya.com/tools/color-blindness-simulator/): Color blindness simulator for images with protanopia, deuteranopia, tritanopia and achromatopsia views. Private, free and browser-based.
- [Color Contrast Checker](https://candoya.com/tools/color-contrast-checker/): Free WCAG color contrast checker. Enter a text and background color to get the contrast ratio and instant AA & AAA pass/fail for normal and large text.
- [Complementary Colors](https://candoya.com/tools/complementary-colors/): Find the exact complementary color for any HEX, RGB, or HSL value. Preview the opposite hue, contrast ratio, and copy-ready CSS instantly.
- [Color Harmony Wheel](https://candoya.com/tools/color-harmony-wheel/): Use an interactive color harmony wheel to create complementary, analogous, triadic, tetradic, split-complementary, and square color schemes.
- [Dark Mode Color Converter](https://candoya.com/tools/dark-mode-color-converter/): Convert light-theme background, surface, text, and accent colors into a contrast-aware dark mode palette. Preview roles and copy CSS instantly.
- [Color Mixer](https://candoya.com/tools/color-mixer/): Mix two colors online at any ratio. Preview the result live and copy its HEX, RGB, HSL or CSS value without uploads or sign-up.
- [Color Picker](https://candoya.com/tools/color-picker/): Free online color picker with HEX, RGB, HSL, HSV and CMYK values. Pick a color, adjust channels and copy CSS-ready formats in your browser.
- [Color Palette Generator](https://candoya.com/tools/color-palette-generator/): Free color palette generator: turn one base color into complementary, analogous, triadic or monochromatic schemes and copy the hex codes. No sign-up.
- [Color Shades for Figma](https://candoya.com/tools/color-shades-for-figma/): Generate color shades for Figma from any hex. Build a named 50-950 scale, preview it, and copy variable JSON, names with HEX, or CSS.
- [Color Temperature](https://candoya.com/tools/color-temperature/): Convert color temperature from Kelvin to RGB and HEX with a live spectrum, common light presets and an instant screen preview.
- [CMYK to RGB Converter](https://candoya.com/tools/cmyk-to-rgb/): Convert CMYK percentages to RGB and HEX instantly. Preview print colors on screen, inspect the formula and copy results in your browser.
- [CSS Border Radius Generator](https://candoya.com/tools/css-border-radius-generator/): Free CSS border radius generator with live preview, per-corner controls, elliptical slash syntax and copyable CSS. No sign-up.
- [CSS Box Shadow Generator](https://candoya.com/tools/css-box-shadow-generator/): Free CSS box shadow generator with layered shadows, inset mode, live preview and clean copyable CSS. Build card, button and panel shadows online.
- [CSS Gradient Generator](https://candoya.com/tools/css-gradient-generator/): Free CSS gradient generator: build linear, radial and conic gradients with color stops and angle, preview live and copy clean CSS. No sign-up.
- [Glassmorphism Generator](https://candoya.com/tools/glassmorphism-generator/): Create frosted glass CSS with a live glassmorphism preview. Tune blur, tint, transparency, border, radius and shadow, then copy the code.
- [Gradient Generator](https://candoya.com/tools/gradient-generator/): Free gradient generator: design a linear or radial color gradient, preview it live, and download a ready-to-use PNG image at any size. No sign-up.
- [Mesh Gradient Generator](https://candoya.com/tools/mesh-gradient-generator/): Free mesh gradient generator with draggable color points, live CSS, presets and PNG export. Create a polished background in your browser.
- [HEX to HSL Converter](https://candoya.com/tools/hex-to-hsl/): Free HEX to HSL converter. Type a hex color code like #3366cc and get the hsl() value, a live color preview and one-click copy - right in your browser.
- [HEX to RGB Converter](https://candoya.com/tools/hex-to-rgb/): Free HEX to RGB converter. Type a hex color code like #ff5733 and get the rgb() value, a live color preview and one-click copy - right in your browser.
- [HSL to HEX Converter](https://candoya.com/tools/hsl-to-hex/): Convert HSL to HEX instantly with synchronized controls, opacity support, a live preview and one-click copy. Free and private in your browser.
- [Random Color Generator](https://candoya.com/tools/random-color-generator/): Free random color generator for HEX, RGB and HSL values. Reroll colors, lock favorites, use a seed and copy CSS-ready output.
- [RGB to CMYK Converter](https://candoya.com/tools/rgb-to-cmyk/): Convert RGB colors to CMYK instantly. Enter RGB values or pick a color, see live CMYK output with copyable values. No upload, no sign-up - runs in your browser.
- [RGB to HEX Converter](https://candoya.com/tools/rgb-to-hex/): Convert RGB to HEX instantly with channel sliders, opacity support, a live color preview and one-click copy. Free and private in your browser.
- [SVG Pattern Generator](https://candoya.com/tools/svg-pattern-maker/): Create seamless, tileable SVG background patterns in your browser. Pick a shape, colors, size and thickness, then copy the CSS or SVG. No sign-up, runs locally.
- [Tailwind Palette Generator](https://candoya.com/tools/tailwind-palette-generator/): Generate an 11-shade Tailwind color palette from any hex. Preview every 50-950 shade and copy Tailwind v4, v3, CSS, or JSON code.
- [Triadic Color Generator](https://candoya.com/tools/triadic-colors/): Free triadic color generator to create balanced 3-color harmonies 120° apart on the hue wheel. Instant hex, RGB and HSL output - no sign-up, runs in your browser.
- [WCAG Contrast Checker](https://candoya.com/tools/wcag-contrast-checker/): Check WCAG contrast from a screenshot or exact hex colors. Sample foreground and background pixels for instant AA and AAA results in your browser.

## [Calculators](https://candoya.com/tools/calc/)

Math, finance, dates, health and percentages.

- [Aspect Ratio Calculator](https://candoya.com/tools/aspect-ratio-calculator/): Aspect ratio calculator for images, video and layouts. Reduce width:height, get CSS aspect-ratio, and calculate matching resize dimensions.
- [Big Number Calculator](https://candoya.com/tools/big-number-calculator/): Free big number calculator for exact arbitrary-precision math. Add, multiply, divide and raise huge numbers to powers with no rounding, right in your browser.
- [Correlation Coefficient Calculator](https://candoya.com/tools/correlation-coefficient/): Free correlation coefficient calculator: paste paired X and Y data and get Pearson's r, r squared, Spearman's rank, covariance and the regression line instantly. Runs in your browser.
- [Decimal to Fraction Converter](https://candoya.com/tools/decimal-to-fraction/): Convert decimals to fractions in lowest terms, including negative and repeating decimals. See exact steps and mixed numbers instantly.
- [Fraction Calculator](https://candoya.com/tools/fraction-calculator/): Free online fraction calculator to add, subtract, multiply and divide fractions and mixed numbers. Get the answer in lowest terms instantly, in your browser.
- [Fraction to Decimal Converter](https://candoya.com/tools/fraction-to-decimal/): Convert fractions to decimals online with repeating digits shown in parentheses. Exact BigInt long division, no sign-up, no upload.
- [GCD and LCM Calculator](https://candoya.com/tools/gcd-lcm-calculator/): GCD and LCM calculator for 2 to 20 integers. Get exact answers, normalized values and Euclidean algorithm steps instantly in your browser.
- [Integral Calculator](https://candoya.com/tools/integral-calculator/): Free integral calculator: enter a function and lower and upper limits to evaluate the definite integral instantly. No sign-up, no download - runs in your browser.
- [Matrix Calculator](https://candoya.com/tools/matrix-calculator/): Use this matrix calculator to add, subtract, multiply, transpose, invert, find determinants, and calculate RREF. Free, private, and instant.
- [Mean, Median & Mode Calculator](https://candoya.com/tools/mean-average-calculator/): Free mean median mode calculator: paste a list of numbers and get the mean (average), median, mode, range, sum, count and standard deviation instantly. Runs in your browser.
- [Median & Mode Calculator](https://candoya.com/tools/median-mode-calculator/): Use this median calculator to find the middle value, mode, sorted positions, and frequencies for any number set. Free and private in your browser.
- [Perimeter Calculator](https://candoya.com/tools/perimeter-calculator/): Free perimeter calculator for a rectangle, square, triangle, circle, polygon and more. Pick a shape, enter the dimensions, and get the perimeter with the formula - instantly in your browser.
- [Percentage Change Calculator](https://candoya.com/tools/percentage-change/): Free percentage change calculator: enter an old value and a new value to get the percent increase or decrease instantly, with the worked formula. Runs in your browser.
- [Percentage Calculator](https://candoya.com/tools/percentage-calculator/): Free percentage calculator: find X% of a number, what percent one number is of another, and percent increase or decrease - instantly in your browser.
- [Prime Factorization Calculator](https://candoya.com/tools/prime-factorization/): Use this prime factorization calculator to break integers up to 1 trillion into prime powers, see every division step, and copy the exact result.
- [Quadratic Equation Solver](https://candoya.com/tools/quadratic-equation-solver/): Solve quadratic equations online with real or complex roots, the discriminant, vertex, and clear quadratic formula steps. Free and private.
- [Proportion Solver](https://candoya.com/tools/proportion-solver/): Proportion calculator to solve any missing value in a/b = c/d with exact fractions, decimals, cross multiplication steps, and ratio checks.
- [Ratio Calculator](https://candoya.com/tools/ratio-calculator/): Ratio calculator to simplify two-part or multi-part ratios, find equivalent ratios, percentages and proportional shares of any total.
- [Roman Numeral Converter](https://candoya.com/tools/roman-numeral-converter/): Free Roman numeral converter: turn numbers into Roman numerals and Roman numerals back into numbers (1-3999), instantly in your browser with the worked breakdown.
- [Standard Deviation Calculator](https://candoya.com/tools/standard-deviation-calculator/): Standard deviation calculator for sample or population data. Paste numbers to get standard deviation, variance, mean, and calculation steps instantly.
- [Truth Table Generator](https://candoya.com/tools/truth-table-generator/): Truth table generator for Boolean expressions with AND, OR, NOT, XOR, implication, and equivalence. See every row, minterm, and result instantly.
- [Variance Calculator](https://candoya.com/tools/variance-calculator/): Variance calculator for sample or population data with formulas, mean, standard deviation, and every squared deviation shown. Free and private.
- [Z-Score Calculator](https://candoya.com/tools/z-score-calculator/): Free z-score calculator: enter a raw value, the mean and standard deviation to get the standard score, its percentile, and the probability - instantly in your browser.
- [Amortization Schedule](https://candoya.com/tools/amortization-schedule/): Build a dated amortization schedule with principal, interest, extra payments, annual summaries and CSV export. Free, private and instant.
- [Auto Loan Calculator](https://candoya.com/tools/auto-loan-calculator/): Auto loan calculator with sales tax, trade-in, payoff, down payment and fees. Estimate your car payment, amount financed and total interest.
- [Break-even Calculator](https://candoya.com/tools/break-even-calculator/): Break-even calculator for units, revenue, contribution margin and profit targets. Test fixed and variable costs instantly in your browser.
- [Cap Table Calculator](https://candoya.com/tools/cap-table-calculator/): Cap table calculator for startup ownership and a priced funding round. See shares, dilution and investor percentages instantly in your browser.
- [Commission Calculator](https://candoya.com/tools/commission-calculator/): Commission calculator for flat or tiered sales rates, optional base pay and clear payout breakdowns. Compare progressive and retroactive plans instantly.
- [Compound Interest Calculator](https://candoya.com/tools/compound-interest/): Free compound interest calculator: project how savings grow from a deposit, rate, compounding frequency and regular contributions - final balance and interest, live in your browser.
- [Credit Card Payoff Calculator](https://candoya.com/tools/credit-card-payoff/): Use this free credit card payoff calculator to estimate your payoff time, monthly payment, total interest and month-by-month balance. No sign-up.
- [Debt Snowball vs Avalanche Calculator](https://candoya.com/tools/debt-snowball-avalanche/): Free debt payoff calculator comparing the snowball and avalanche methods. Enter your debts and extra payment to see which clears them faster and cheaper.
- [Discount Calculator](https://candoya.com/tools/discount-calculator/): Free discount calculator to work out sale price, savings, discount percentage and original price. Instant retail math, no sign-up.
- [Gross Margin Calculator](https://candoya.com/tools/gross-margin-calculator/): Free gross margin calculator for revenue and COGS. See gross profit, margin and markup, or plan target revenue instantly in your browser.
- [Home Affordability Calculator](https://candoya.com/tools/home-affordability/): Free home affordability calculator: estimate how much house you can afford from income, debts, down payment, mortgage rate, taxes, insurance, HOA and PMI.
- [Hourly to Salary Calculator](https://candoya.com/tools/hourly-to-salary/): Hourly to salary calculator for annual, monthly, biweekly, and weekly gross pay. Adjust paid hours and weeks for a realistic estimate.
- [Loan Calculator with Amortization Schedule](https://candoya.com/tools/loan-calculator/): Free loan calculator: enter the amount, interest rate and term to get your monthly payment, total interest, total cost and a full month-by-month amortization schedule - live in your browser.
- [Markup vs Margin](https://candoya.com/tools/markup-vs-margin/): Convert markup to margin or margin to markup instantly. Compare the two profit percentages and see the price from any sample cost.
- [Mortgage Calculator with Taxes, Insurance & PMI](https://candoya.com/tools/mortgage-calculator/): Free mortgage calculator: enter home price, down payment, rate and term to get your full monthly payment - principal, interest, property tax, home insurance and PMI - plus a live amortization schedule.
- [Mortgage Overpayment Calculator](https://candoya.com/tools/mortgage-overpayment/): Mortgage overpayment calculator for recurring and one-off extra payments. Compare interest and time saved with a clear payoff schedule.
- [MRR and ARR Calculator](https://candoya.com/tools/mrr-arr-calculator/): MRR and ARR calculator for SaaS plan mixes. Normalize monthly, quarterly and annual subscriptions into clear recurring revenue totals instantly.
- [NPV Calculator](https://candoya.com/tools/npv-calculator/): NPV calculator with editable cash flows, a discounted period table and worked net present value result. Free, private and no sign-up required.
- [Profit Margin Calculator](https://candoya.com/tools/profit-margin-calculator/): Free profit margin calculator to work out margin, markup, profit and target selling price. Instant pricing math, no sign-up.
- [Rent vs Buy Calculator](https://candoya.com/tools/rent-vs-buy/): Use this free rent vs buy calculator to compare home equity, rent, mortgage costs, maintenance, appreciation and invested savings over time.
- [Retirement Calculator](https://candoya.com/tools/retirement-calculator/): Retirement calculator to project your savings, income target and monthly contribution. Include inflation and expected return with no sign-up.
- [ROI Calculator](https://candoya.com/tools/roi-calculator/): ROI calculator for gain or loss, return percentage, break-even value and optional annualized ROI. Clear formulas, no sign-up and no upload.
- [ROAS Calculator](https://candoya.com/tools/roas-calculator/): ROAS calculator for return on ad spend as a multiple, ratio and percentage, with optional break-even ROAS from gross margin. Free and private.
- [Startup Runway Calculator](https://candoya.com/tools/runway-calculator/): Startup runway calculator for cash, monthly expenses and revenue. See net burn, months remaining, zero-cash date and an 18-month target check.
- [Savings Goal Calculator](https://candoya.com/tools/savings-goal-calculator/): Savings goal calculator to find how much to save each month for a target and deadline. Include current savings and APY, with no sign-up.
- [Invoice Generator](https://candoya.com/tools/invoice-generator/): Free invoice generator for creating printable invoices with line items, tax, discounts, payments and HTML download. Private, no sign-up.
- [Tip Calculator](https://candoya.com/tools/tip-calculator/): Free tip calculator to work out gratuity, tax, total and split bill amounts instantly. Round the total or each share, no sign-up.
- [Unit Price Comparison](https://candoya.com/tools/unit-price-comparison/): Unit price calculator to compare two packages by item, weight, or volume. Convert mixed units instantly and see which option costs less.
- [VAT Calculator](https://candoya.com/tools/vat-calculator/): VAT calculator to add or remove VAT and split any price into net, tax and gross amounts. Use any rate and currency, with no sign-up.
- [Vesting Schedule Calculator](https://candoya.com/tools/vesting-schedule/): Free vesting schedule calculator for RSUs, stock options and equity grants. Set your start date, cliff and term to see exactly what has vested and when.
- [BMI Calculator](https://candoya.com/tools/bmi-calculator/): Free BMI calculator. Enter your height and weight in metric or imperial units to get your Body Mass Index and WHO weight category instantly in your browser.
- [BMR Calculator](https://candoya.com/tools/bmr-calculator/): Free BMR calculator using the Mifflin-St Jeor equation. Estimate resting calories from age, sex, height and weight in metric or US units.
- [Calories Burned by Activity Calculator](https://candoya.com/tools/calories-burned-by-activity/): Free calories burned by activity calculator. Pick an activity, enter weight and minutes, and estimate kcal with the standard MET formula in your browser.
- [Running Pace Calculator](https://candoya.com/tools/running-pace-calculator/): Free running pace calculator for pace per km and mile, speed, and even race splits. Enter distance and time in metric or imperial units.
- [TDEE Calculator](https://candoya.com/tools/tdee-calculator/): Free TDEE calculator for daily calorie needs. Estimate maintenance calories from age, height, weight, sex and activity in metric or US units.

## [Games & Fun](https://candoya.com/tools/games/)

Word games, puzzles and card generators to play.

- [2048 Game](https://candoya.com/tools/2048-game/): Play the classic 2048 game online for free. Merge number tiles with keys or swipes, undo a move, and save your board and best score in your browser.
- [Anagram Game](https://candoya.com/tools/anagram-game/): Play a free anagram game online: unscramble the jumbled letters to find the hidden word. Pick a topic, chase a streak, or load your own words. Runs in your browser.
- [Bingo Card Generator](https://candoya.com/tools/bingo-card-generator/): Make free printable bingo cards in your browser. Use your own words or classic 1-75 numbers, pick a grid size, generate as many cards as you need, and print.
- [Click Speed Test](https://candoya.com/tools/click-speed-test/): Take a free click speed test to measure clicks per second with a mouse, touch, or pen. Pick a timer and get an instant CPS result in your browser.
- [Maze Generator](https://candoya.com/tools/maze-generator/): Generate random perfect mazes online with adjustable size, view the solution path, and download as PNG or SVG. No sign-up required - runs entirely in your browser.
- [Reaction Time Test](https://candoya.com/tools/reaction-time-test/): Take a free reaction time test and measure your visual reflex speed in milliseconds across five rounds. Works with mouse, keyboard, or touch.
- [Typing Speed Test](https://candoya.com/tools/typing-speed-test/): Take a free typing speed test to check your WPM and accuracy in 15, 30, or 60 seconds. Get instant results with no sign-up or download.

## [Social & Creator](https://candoya.com/tools/social/)

Profile, caption and sharing helpers for creators.

- [Depth Estimation](https://candoya.com/tools/depth-estimation/): Estimate relative scene depth from a photo with on-device AI. Create and download a private color depth map with WebGPU or CPU fallback.
- [Image Captioner](https://candoya.com/tools/image-captioner/): Generate editable image captions with private on-device AI. Get three English descriptions with no image upload, account, or usage credits.
- [Keyword Extractor](https://candoya.com/tools/keyword-extractor/): Extract keywords from text with private, on-device AI. Rank English words and phrases by semantic relevance, then copy or export results.
- [Language Detector](https://candoya.com/tools/language-detector/): Identify the language of text with private on-device AI. Compare the top three matches across 20 languages with no text upload or sign-up.
- [Named Entity Recognition](https://candoya.com/tools/named-entity-recognition/): Find people, organizations, locations, and other named entities with private on-device NER. Highlight text and export grouped results as CSV.
- [Handwriting and Print OCR](https://candoya.com/tools/ocr-handwriting-print/): Turn a cropped English handwriting or print line into editable text with private on-device AI OCR. No image upload, account, or API key.
- [Object Detection](https://candoya.com/tools/object-detection/): Detect objects in images with private on-device AI. See bounding boxes, confidence scores, and a downloadable annotated PNG with no image upload.
- [Parts of Speech Tagger](https://candoya.com/tools/parts-of-speech-tagger/): Use this parts of speech tagger to label English words by grammatical role. Review token scores and export CSV with private on-device AI.
- [Pose Detection](https://candoya.com/tools/pose-detection/): Detect poses in images with on-device AI. Map 33 body landmarks, inspect joint angles, and export JSON or an annotated PNG without uploading your photo.
- [Question Answering](https://candoya.com/tools/question-answering/): Use a free question answering tool to extract an answer from English text on your device. See the source passage and confidence with no text upload.
- [Semantic Search Demo](https://candoya.com/tools/semantic-search-demo/): Try semantic search in your browser. Rank up to 50 English passages by meaning with local MiniLM embeddings, WebGPU, and a CPU fallback.
- [Sentiment Analysis](https://candoya.com/tools/sentiment-analysis/): Analyse text as negative, neutral, or positive with private on-device AI. See all three model scores with no text upload, account, or API key.
- [Speech to Text](https://candoya.com/tools/speech-to-text/): Turn speech to text with private on-device Whisper AI. Record your microphone, edit the transcript, and download TXT with no upload or sign-up.
- [Text Summarizer](https://candoya.com/tools/text-summarizer/): Summarize articles, emails, and documents with free on-device AI. No sign-up, no upload - your text stays in your browser. Instant abstractive summaries.
- [Text Classifier](https://candoya.com/tools/text-classifier/): Use a private AI text classifier to sort English text by topic, message type, or meeting-note purpose. Runs on your device with no text upload.
- [Text Similarity](https://candoya.com/tools/text-similarity/): Compare two texts by semantic meaning using on-device AI. Get a similarity score from 0-100% without uploading anything.
- [Zero-Shot Classifier](https://candoya.com/tools/zero-shot-classifier/): Use a private zero-shot classifier to rank English text against labels you choose. Runs on-device with WebGPU or a CPU fallback, with no text upload.
- [Audio Joiner](https://candoya.com/tools/audio-joiner/): Join audio files online into one MP3 or WAV. Reorder and preview clips, merge mixed formats locally, and download without uploads or sign-up.
- [Audio Normalizer](https://candoya.com/tools/audio-normalizer/): Normalize audio online to a precise peak level, preview the result, and download a private WAV. No upload, account, watermark, or software install.
- [Audio Recorder](https://candoya.com/tools/audio-recorder/): Record microphone audio online with a live level meter, pause and resume, local playback, and private WebM, MP4, or Ogg download.
- [Audio Speed Changer](https://candoya.com/tools/audio-speed-changer/): Change audio speed online from 0.5x to 2x, preserve pitch, preview the result, and download a private WAV with no upload or sign-up.
- [Audio to Text](https://candoya.com/tools/audio-to-text/): Convert audio to text privately with on-device Whisper AI. Transcribe MP3, WAV, M4A, and more in your browser with no upload or sign-up.
- [Audio Trimmer](https://candoya.com/tools/audio-trimmer/): Trim audio online with precise start and end times, preview the selected clip, and download a private WAV. No upload, account, or watermark.
- [Audio Waveform Image](https://candoya.com/tools/audio-waveform-image/): Create an audio waveform image from MP3, WAV, M4A, or OGG. Customize colors, style, and size, then download a private high-resolution PNG.
- [Binaural Beats Generator](https://candoya.com/tools/binaural-beats-generator/): Free binaural beats generator with carrier, beat, volume, preset, timer, and stereo WAV controls. Listen privately in your browser with headphones.
- [BPM Detector](https://candoya.com/tools/bpm-detector/): Use this free BPM detector to find a song or sample's tempo online. Get confidence and half-time options without uploading your audio.
- [Audio Fade In and Out](https://candoya.com/tools/fade-in-out/): Add an audio fade in and fade out online, preview the curve, and download a private WAV. Free, no sign-up, and your file is never uploaded.
- [Frequency Generator](https://candoya.com/tools/frequency-generator/): Frequency sweep generator for smooth 20 Hz to 20 kHz audio sweeps. Choose the range, curve, waveform, duration, and download a local WAV.
- [Guitar Tuner](https://candoya.com/tools/guitar-tuner/): Use this online guitar tuner with your microphone to tune standard, Drop D, half-step-down, or DADGAD guitar. Audio stays on your device.
- [Metronome](https://candoya.com/tools/metronome/): Free online metronome with tap tempo, subdivisions, time signatures, downbeat accent, and precise browser-scheduled clicks from 30 to 300 BPM.
- [Pitch Detector](https://candoya.com/tools/pitch-detector/): Use this online pitch detector to identify a note, frequency and cents offset from your voice or instrument. Live audio stays on your device.
- [Pitch Shifter](https://candoya.com/tools/pitch-shifter/): Shift audio pitch online by semitones and cents while preserving tempo. Preview locally and download a private WAV with no upload or sign-up.
- [Reverse Audio](https://candoya.com/tools/reverse-audio/): Reverse audio online, preview it backwards, and download a WAV privately. Works with MP3, WAV, M4A, FLAC, OGG, and more without uploading.
- [Ringtone Maker](https://candoya.com/tools/ringtone-maker/): Make a ringtone online from any song. Trim a 30-second clip, add smooth fades, preview it, and export M4R for iPhone or MP3 for Android.
- [Spectrum Analyzer](https://candoya.com/tools/spectrum-analyzer/): Use a free online spectrum analyzer for audio files or your microphone. View live FFT frequencies and readable band levels privately in your browser.
- [Stereo to Mono Converter](https://candoya.com/tools/stereo-to-mono/): Convert stereo to mono online, preview the channel mix, and download a private mono WAV. Keep both channels or choose the cleanest side.
- [Text to Speech](https://candoya.com/tools/text-to-speech/): Use free text to speech online with your browser voices. Choose a language, rate, pitch, and volume, then pause or resume with no sign-up.
- [Tone Generator](https://candoya.com/tools/tone-generator/): Online tone generator for sine, square, triangle, and sawtooth signals from 20 Hz to 20 kHz. Play or download a WAV locally in your browser.
- [White Noise Generator](https://candoya.com/tools/white-noise-generator/): Play white, pink, or brown noise online with volume, tone, and timer controls. Free, private, and generated entirely in your browser.
- [Audio Volume Changer](https://candoya.com/tools/volume-changer/): Change audio volume online from mute to 300%, preview the gain, and download a private WAV. No upload, account, watermark, or software install.
- [Video Watermark](https://candoya.com/tools/add-video-watermark/): Add a text or logo watermark to video online. Preview size, opacity, and position, then export a private MP4 locally with no account or upload.
- [Auto Captions](https://candoya.com/tools/auto-captions/): Generate automatic video captions privately with on-device Whisper AI. Edit timings and download SRT or VTT with no upload, account, or watermark.
- [Boomerang Maker](https://candoya.com/tools/boomerang-maker/): Make a boomerang video online from any short clip. Trim, set speed, add forward-reverse cycles, and export a private, watermark-free MP4.
- [Subtitle Burner](https://candoya.com/tools/burn-in-subtitles/): Burn subtitles into video from an SRT or WebVTT file. Preview style and timing, then export a private, watermark-free MP4 in your browser.
- [Chroma Key Video](https://candoya.com/tools/chroma-key-video/): Remove a green screen from video online with live chroma key controls. Export transparent WebM locally with no upload, account, or watermark.
- [Crop Video](https://candoya.com/tools/crop-video/): Crop video online with a visual frame, social aspect ratios, and exact pixels. Export a private, watermark-free MP4 without uploading your file.
- [Audio Extractor](https://candoya.com/tools/extract-audio-from-video/): Extract audio from video as MP3, M4A, or WAV with private in-browser processing, preview, bitrate controls, and no file upload or watermark.
- [FPS Changer](https://candoya.com/tools/fps-changer/): Change video FPS online to 24, 30, 60, or a custom frame rate. Convert privately in your browser and download a watermark-free MP4.
- [Frames to Video](https://candoya.com/tools/frames-to-video/): Turn PNG, JPEG, or WebP frames into a video in your browser. Sort, reorder, set frame rate and resolution, then download without uploading.
- [GIF to Video](https://candoya.com/tools/gif-to-video/): Convert GIF to video as MP4 or WebM with quality, size, repeat, and background controls. Free, private, local, and watermark-free.
- [Loop Video](https://candoya.com/tools/loop-video/): Loop video online by repeating an MP4, MOV, WebM, or other clip 2 to 10 times. Export locally with no upload, watermark, or account.
- [Mute Video](https://candoya.com/tools/mute-video/): Mute video online by removing every audio track without changing picture quality. Private browser processing, previews, progress, cancel, and download.
- [Reverse Video](https://candoya.com/tools/reverse-video/): Reverse video online with optional backward audio, MP4 or WebM export, and no watermark. Your clip stays private and processes in your browser.
- [Rotate and Flip Video](https://candoya.com/tools/rotate-flip-video/): Rotate video online by 90, 180, or 270 degrees, or flip it horizontally or vertically. Export a private MP4 without uploads or watermarks.
- [Screen Recorder](https://candoya.com/tools/screen-recorder/): Record your screen online with optional supported audio, a live timer, instant preview, and local download. No upload, account, or extension.
- [SRT Editor](https://candoya.com/tools/srt-editor/): Edit SRT subtitles online, repair timing, replace text, reorder cues and export a clean file. No upload or sign-up - it stays in your browser.
- [Silent Section Trimmer](https://candoya.com/tools/silent-section-trimmer/): Remove silence from video online with adjustable pause detection and reviewable cuts. Export a private MP4 locally with no upload or watermark.
- [Split Video by Time](https://candoya.com/tools/split-video-by-time/): Split video by time into equal or fixed-duration MP4 clips online. Make up to 30 precise parts privately in your browser with no upload.
- [Subtitle Extractor](https://candoya.com/tools/subtitle-extractor/): Extract embedded subtitles from MKV, MP4, MOV, or WebM video and download an editable SRT file. Private browser processing with no upload.
- [Vertical Clip Cropper](https://candoya.com/tools/vertical-clip-cropper/): Make a video vertical for Reels, Shorts, and TikTok. Crop to 9:16, 4:5, or 1:1 with blur or black fill. Private, no upload, free MP4 export.
- [Video Bitrate Changer](https://candoya.com/tools/bitrate-changer/): Change video bitrate online to a specific target, preserve dimensions and duration, verify the result, and download a private local MP4.
- [Video Aspect Ratio Changer](https://candoya.com/tools/video-aspect-ratio-changer/): Change video aspect ratio to 16:9, 9:16, 1:1, 4:5, 4:3, or 21:9. Crop or add bars locally, then download a watermark-free MP4.
- [Webcam Recorder](https://candoya.com/tools/webcam-recorder/): Record webcam video online with optional microphone audio, a live timer, local playback, retakes, and private WebM or MP4 download.
- [Video Collage Maker](https://candoya.com/tools/video-collage/): Make a video collage online with 2 to 4 clips in a split screen or grid. Preview and export a private MP4 locally with no upload or watermark.
- [Video Color Grade](https://candoya.com/tools/video-color-grade/): Color grade video online with exposure, white balance, shadows, highlights, contrast, and saturation controls. Preview and export a private MP4 locally.
- [Video Compressor](https://candoya.com/tools/video-compressor/): Compress video online with local MP4 or WebM processing, quality and resolution controls, no upload, no watermark, and clear size savings.
- [Video Converter](https://candoya.com/tools/video-converter/): Convert video online to MP4, WebM, MOV, or MKV with private in-browser processing, quality and resolution controls, and no upload or watermark.
- [Video Filters](https://candoya.com/tools/video-filters/): Apply video filters online with live color controls and private MP4 export. Add vivid, mono, sepia, warm, cool, vintage, or noir looks without uploads.
- [Video Joiner](https://candoya.com/tools/video-joiner/): Join videos online into one MP4 or WebM file. Reorder and preview clips, merge mixed formats locally, and download without uploads or watermarks.
- [Video Metadata Viewer](https://candoya.com/tools/video-metadata-viewer/): View video metadata, codecs, dimensions, frame rate, bitrate, audio, subtitles and tags locally. No upload, playback or transcoding.
- [Picture-in-Picture Video Editor](https://candoya.com/tools/video-overlay-picture-in-picture/): Create a picture-in-picture video online with a movable, timed video inset. Export a private MP4 locally with no upload or watermark.
- [Video Resizer](https://candoya.com/tools/video-resizer/): Resize video online to exact pixels or social media dimensions. Fit, fill, or stretch a private video and download a watermark-free MP4.
- [Video Speed Changer](https://candoya.com/tools/video-speed-changer/): Change video speed online from 0.25x to 4x, preview the timing, keep audio synchronized, and download a private, watermark-free MP4.
- [Video Thumbnail Generator](https://candoya.com/tools/video-thumbnail-generator/): Generate a video thumbnail from any browser-playable file. Scrub to the exact frame, export PNG, JPEG, or WebP, and keep the video on your device.
- [Video to Frames](https://candoya.com/tools/video-to-frames/): Convert video to frames in your browser. Choose a time range and interval, preview every image, then download PNG, JPEG, or WebP files in a ZIP.
- [Video to GIF](https://candoya.com/tools/video-to-gif/): Convert video to GIF online with trim, width, frame rate, and color controls. Your video stays on your device with no upload or watermark.
- [Video Trimmer](https://candoya.com/tools/video-trimmer/): Trim a video online with precise start and end times, selection preview, and local MP4 or WebM export. Your video never leaves your device.
- [VTT to SRT](https://candoya.com/tools/vtt-to-srt/): Convert VTT to SRT in your browser. Paste or upload WebVTT captions, validate cues, preview the SubRip result, copy it, or download it free.
- [Profile QR Code Generator](https://candoya.com/tools/profile-qr-code/): Free profile QR code generator for contact cards. Create a scannable MeCard QR as PNG, no sign-up and no upload.

## [SEO & Web](https://candoya.com/tools/seo/)

Meta tags, slugs, sitemaps and validators.

- [Breadcrumb Schema Generator](https://candoya.com/tools/breadcrumb-schema-generator/): Free breadcrumb schema generator that builds valid BreadcrumbList JSON-LD for Google rich results. No sign-up - runs in your browser.
- [Meta Tag Generator](https://candoya.com/tools/meta-tag-generator/): Free meta tag generator that builds SEO, Open Graph, and Twitter Card HTML from your page details. Live preview, no sign-up - runs in your browser.
- [Open Graph Generator](https://candoya.com/tools/open-graph-generator/): Open Graph generator with a live social card preview, required-tag checks, and escaped HTML you can copy. Free and private in your browser.
- [Robots.txt Generator](https://candoya.com/tools/robots-txt-generator/): Free robots.txt generator for valid crawler rules, Allow and Disallow paths, and sitemap URLs. Preview, copy, or download your file in the browser.
- [SERP Snippet Preview](https://candoya.com/tools/serp-snippet-preview/): Free SERP snippet preview to test your title, URL, and meta description in desktop and mobile Google-style results. Live, private, and no sign-up.
- [XML Sitemap Generator](https://candoya.com/tools/sitemap-xml-generator/): Free XML sitemap generator for valid sitemap.xml files. Paste URLs, check errors, add optional metadata, then copy or download in your browser.
- [Topical Map Generator](https://candoya.com/tools/topical-map-generator/): Free topical map generator: turn one seed topic into a pillar-and-cluster SEO content plan with intent labels. Instant, private, no sign-up.
- [UTM Link Builder](https://candoya.com/tools/utm-link-builder/): Free UTM link builder for creating correctly encoded campaign URLs. Add source, medium, campaign, term, content, and ID tags instantly.
- [URL Builder](https://candoya.com/tools/url-builder/): Free URL builder to combine a scheme, host, path, query parameters, and fragment into a correctly encoded link. Build and copy it in your browser.

---

*Markdown edition of <https://candoya.com/tools/>, published for AI agents and other automated readers. Index of key pages: <https://candoya.com/llms.txt>.*