Image Tools

Image Difference Checker

Compare two images side-by-side or overlayed to highlight pixel differences.

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⚙️ Image Difference Checker Controls

✨ Output & Results

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🔒 Total Privacy: All processing is done locally in your browser. No data is sent to external servers.

Image Difference Checker (Diff Tool)

Compare two images side-by-side to highlight the exact visual differences. Perfect for spotting minor changes in UI mockups or finding the differences in game assets.

Pixel-Perfect Visual Comparison

When reviewing revisions of a UI design, a website mockup, or a 3D render, it can be impossible for the human eye to spot minor pixel shifts. This tool acts as a visual 'diff'. You upload the 'Before' and 'After' images, and the algorithm subtracts the pixels of one from the other, generating a heat-map overlay that highlights every single changed pixel in bright red.

Why Use Our Image Difference Checker?

  • UI/UX QA Testing: Verify that a developer perfectly matched the Figma design.
  • Spot Minor Edits: Instantly see if a photo was retouched.
  • Heatmap Overlay: Changed pixels are highlighted in neon colors.
  • 100% Private: Compare confidential corporate designs offline.

How to Use the Image Difference Checker

1.

Upload the Original (Before) image.

2.

Upload the Modified (After) image.

3.

Click 'Compare Images'.

4.

Review the generated Diff Image, where all changes are highlighted.

Frequently Asked Questions

Do the images need to be the same size?

Yes, for a pixel-perfect subtraction, both images must have the exact same width and height dimensions.

What happens if an image was shifted by 1 pixel?

If the entire image shifts by 1 pixel, the tool will highlight almost the entire image, because technically, every pixel is now in a different location than it was originally.

Privacy Note

All file processing is performed locally in your web browser. We do not upload, store, or view your data.