--- title: "Base64 Encode & Decode - Online Converter | CanDoYa" description: "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." url: https://candoya.com/tools/base64-encode-decode/ locale: en type: browser-tool --- # Base64 Encode and Decode Category: Developer ## What is Base64 encoding? Base64 is a way of representing any data as plain text using 64 safe characters (A-Z, a-z, 0-9, + and /). This tool encodes text to Base64 and decodes Base64 back to readable text in your browser. It handles full Unicode through UTF-8, so accents, emoji and other languages survive the round trip intact. Encoding runs as you type and stays on your device - your text is never uploaded, which makes it safe for tokens, config snippets and private notes. Switch on **URL-safe** output to get the `-` and `_` alphabet used in JWTs and query strings, and decoding auto-detects either alphabet plus any missing padding. ## How to use it 1. **Pick a direction** - Choose Encode to turn text into Base64, or Decode to turn Base64 back into text. 2. **Paste your input** - Type or paste into the input box - the result updates live in the panel beside it. 3. **Choose URL-safe (optional)** - Tick URL-safe when encoding for a URL, filename or JWT; decoding handles both alphabets automatically. 4. **Copy the result** - Copy the output and paste it wherever you need it. Invalid Base64 shows a clear message instead of garbled text. ## Who it's for - **Developers** embedding small assets or credentials as Base64 in JSON, YAML or environment files. - **API and webhook work** - decoding a Base64 field from a payload to read what it actually contains. - **Anyone inspecting a JWT** who needs to decode a Base64URL segment by hand. - **Email and data formats** that store attachments or binary blobs as Base64 text. ## Expert note Most quick Base64 snippets use the browser's btoa(), which throws on any character outside Latin-1 - so an emoji or a Cyrillic letter breaks them. This tool encodes through UTF-8 bytes first, so "café" and "🌍" encode and decode correctly, exactly as a server-side library would. ## Frequently asked questions ### Is this Base64 tool free? Yes - it's completely free, with no sign-up and no usage limits. Encoding and decoding both run in your browser. ### Is my data uploaded anywhere? No. Your text and Base64 are processed locally in your browser and never sent to a server, so it's safe for tokens, keys and private content. ### Is Base64 encryption? No. Base64 is encoding, not encryption - it only reformats data into text and anyone can decode it. Use it to safely transport data, never to protect a secret. ### Does it handle emoji and non-English text? Yes. Input is converted to UTF-8 bytes before encoding, so accents, emoji and non-Latin scripts encode and decode correctly instead of throwing an error or corrupting the characters. ### What is URL-safe Base64? URL-safe Base64 swaps the + and / characters for - and _ and usually drops the = padding, so the result is safe inside URLs, filenames and JWTs. Turn on the URL-safe option when encoding; decoding accepts it automatically. ### Why does my decoded output look like random characters? Base64 can hold any bytes, including binary data like an image or a compressed file. If you decode that as text you'll see gibberish - the data is fine, it just isn't text. This tool is for text payloads. ### Do I need the = padding to decode? No. The decoder restores missing padding for you and ignores stray spaces and line breaks, so you can paste a Base64 string with or without its trailing = signs. ## Related tools - [URL Encode and Decode](https://candoya.com/tools/url-encode-decode/) - [JSON Formatter](https://candoya.com/tools/json-formatter/) - [JWT Decoder](https://candoya.com/tools/jwt-decoder/) - [HTML Entity Encode and Decode](https://candoya.com/tools/html-entity-encode-decode/) --- *Markdown edition of , published for AI agents and other automated readers. Index of key pages: .*