# Compare Two Images Online: Find Differences Free - [Home](/) - - - [Tools](/tools/) - - - Compare Two Images # Compare Two Images Online: Find Differences Load two versions of a picture and see exactly what changed. Drag a swipe slider across them, view them side by side, or highlight every changed pixel in red. Everything runs in your browser. Image A (original) Drop image a (original) here, or click to choose JPG - PNG - WebP - AVIF - up to 200 MB Choose files Image B (changed) Drop image b (changed) here, or click to choose JPG - PNG - WebP - AVIF - up to 200 MB Choose files Free to UseNo hidden chargesNo Software InstallationRuns in your browserNo Sign UpStart instantly ## Work privately, then store privately with DragBin Processing a file in your browser keeps it private in the moment. The files you keep and share need that same guarantee for the long run. DragBin protects files with [client side](/client-side-encryption/), [quantum resistant encryption](/post-quantum-encryption/) (ML-KEM + AES-256) keeping sensitive data private with a [zero knowledge](/zero-knowledge-encryption/) security architecture. - Get 5GB quantum resistant storage forever - Unlimited sharing, unlimited bandwidth and unlimited file size uploads - Integrated Global CDN and preview media in 4k/8k [Try DragBin Today](https://dragbin.com) ## How to Compare Two Images Spot the differences between two images in three steps: Step 1 Add the original as image A and the changed version as image B. Step 2 Switch between swipe, side by side and difference views, and tune the tolerance. Step 3 Read the stats and download the difference image as a PNG. ## Why Use This Image Comparison Tool? Checking an edit, a re-export or a screenshot regression by eye is slow and error-prone. This tool measures the change pixel by pixel and shows you where it is. ### Free No fees, no watermark on the difference image, no usage cap. ### Runs in Your Browser Nothing to install. Works on desktop and mobile browsers. ### No Signup No account and no email. Open the page and compare. ## What You Get Your images are decoded and compared on your own device and are never uploaded to a server. You get numbers, not just a picture. ### Private by Design Images never leave your device. Closing the tab discards them. ### Adjustable Tolerance Ignore tiny compression noise or catch a single changed value. ### Byte-Level Check A SHA-256 fingerprint tells you if the two files are exactly identical. ## Try DragBin Today Pair private, in-browser file tools with zero-knowledge, quantum-resistant cloud storage. 5GB free, forever. [Claim 5GB free storage (opens in new tab)](https://app.dragbin.com/signup) ## Frequently Asked Questions ### Are my images uploaded anywhere? No. Both images are decoded, compared and hashed inside your browser. They are never sent to a server, and closing the tab discards them. If your browser can't open an AVIF or JPEG XL file itself, the page downloads a decoder from dragbin.com, but your images stay on your device. ### How does the difference overlay work? Each pixel of image B is compared with the same pixel of image A on the red, green, blue and alpha channels. If any channel differs by more than the tolerance you set, the pixel is painted red on top of a faded copy of image A. ### What if the two images are different sizes? The tool tells you, then stretches image B to image A's dimensions before comparing. Scaling itself changes pixels, so expect some differences from resampling alone in that case. ### Why are large images compared at a smaller size? To keep the comparison fast and within browser memory limits, images whose long side is over 2048 pixels are scaled down to 2048 pixels before diffing. The page states when this happens. Very tiny differences can disappear at the reduced size. ### What does byte-identical mean? The tool computes a SHA-256 fingerprint of each file. If the fingerprints match, the two files are exactly the same down to every byte, including metadata. Two files can look identical pixel for pixel and still not be byte-identical, for example after re-saving or stripping EXIF data. ### Which image formats can I compare? Any format your browser can open, typically JPG, PNG, WebP, GIF, BMP and AVIF. Images above 60 megapixels are refused because browsers, especially Safari on iPhone, cannot reliably draw them. More free tools ## Keep going with the DragBin toolbox [ ### Image Compressor Shrink JPG, PNG and WebP files, then compare the result here. ](/tools/image-compressor/)[ ### Image Format Comparison See how one image looks and weighs in different formats. ](/tools/image-format-comparison/)[ ### Image Converter Convert between JPG, PNG, WebP and AVIF in your browser. ](/tools/image-converter/) --- Canonical: https://www.dragbin.com/tools/compare-images