--- title: "Image Dimensions Checker - Pixel Size and Ratio | CanDoYa" description: "Check image dimensions, pixel size, aspect ratio, megapixels and file size instantly. Your image stays private in your browser." url: https://candoya.com/tools/image-dimensions-checker/ locale: en type: browser-tool --- # Free Image Dimensions Checker Category: Images ## What is an image dimensions checker? An image dimensions checker reads a picture's exact width and height in pixels, then calculates its aspect ratio, megapixel count and orientation. It also identifies the file format and stored size. Use it before uploading, printing or resizing an image, without sending the file to a server. **Pixel dimensions and file size answer different questions.** A 1920 x 1080 image contains about 2.07 million pixels and has a 16:9 shape, but JPEG or WebP compression determines how much storage it uses. This checker reports both measurements without changing the image. ## How to use it 1. **Choose an image** - Drop a JPG, PNG, WebP, GIF, AVIF, BMP or SVG file into the checker, or click the upload area to browse. 2. **Read the measurements** - Review the decoded width and height, simplified aspect ratio, megapixels, orientation, format and file size. 3. **Copy the details** - Copy the complete measurement summary for a brief, asset ticket or upload checklist. ## Who it's for - **Designers and developers** can verify that exported assets match a layout slot before adding them to a site or app. - **Content teams** can check social images, blog covers and marketplace uploads against pixel requirements. - **Photographers** can compare resolution, megapixels and orientation before printing, sharing or resizing a photo. - **QA teams** can confirm delivered images have the expected format, dimensions and stored file size. ## Expert note Pixel dimensions do not reveal print size on their own: a 3000 x 2400 image prints at 10 x 8 inches at 300 pixels per inch, but changing a DPI metadata tag without resampling does not add or remove pixels. ## Frequently asked questions ### Is my image uploaded anywhere? No. Your browser opens the selected image locally to read its natural width and height. The file and the measurements are not sent to CanDoYa or a processing server. Clearing the tool also releases the temporary local preview. ### Is the image dimensions checker free? Yes. You can check images and copy their measurements without an account, subscription or watermark. The checker accepts one file at a time, up to 50 MB, and runs with the image formats your browser can decode. ### Which image formats can I check? The checker accepts JPG, PNG, WebP, GIF, AVIF, BMP and SVG. Actual decoding support depends on your browser, especially for newer formats such as AVIF. Animated GIFs report the canvas dimensions shared by their frames, not animation length. ### How do I find an image's width and height in pixels? Drop the image into the checker or choose it from your device. Once the browser decodes the file, the width and height appear as a pair such as 1920 x 1080 px, with separate cards for each dimension. ### What is the difference between image dimensions and file size? Image dimensions count pixels across and down. File size measures the stored bytes used by the compressed file. Two images can have identical dimensions but very different file sizes because their formats, quality settings and visual detail compress differently. ### How is the image aspect ratio calculated? The checker divides both pixel dimensions by their greatest common divisor. A 1920 x 1080 image becomes 16:9, while a 1200 x 800 image becomes 3:2. The ratio describes shape, not the total number of pixels. ### Are image dimensions the same as resolution or DPI? People often call width and height the image resolution, but DPI or PPI describes a print-density setting. Pixel dimensions are fixed until the image is resampled. A DPI tag can change the suggested print size without changing the pixel count. ## Related tools - [Image Resizer](https://candoya.com/tools/image-resizer/) - [Image Cropper](https://candoya.com/tools/image-cropper/) - [Image Compressor](https://candoya.com/tools/image-compressor/) - [EXIF Metadata Viewer](https://candoya.com/tools/exif-metadata-viewer/) - [Aspect Ratio Calculator](https://candoya.com/tools/aspect-ratio-calculator/) --- *Markdown edition of , published for AI agents and other automated readers. Index of key pages: .*