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Image difference checker

Spot every change between two pictures, as a highlight, heat map or mask.

  • Free
  • No sign-up
  • Works on any device

About Image difference checker

Load two versions of a picture and see exactly which pixels changed, shown as a highlight overlay, a heat map or a black and white mask. Handy for checking design revisions, screenshot regressions or edited photos. Both images should have the same size, otherwise everything looks different.

How to use Image difference checker

  1. Set the options above. The result updates live.
  2. Change anything until it's just right.
  3. Copy the result or download it.

Why use this tool?

Also known as

Frequently asked questions

Why does it show changes everywhere on identical-looking images?

Re-saving a JPEG alters pixels slightly through compression, and different sizes shift every pixel. Compare lossless PNG files of the same dimensions, or raise the sensitivity threshold to ignore tiny differences.

Is Image difference checker free?

Yes. Image difference checker on Toolipedia is free to use, with no sign-up and no watermark.

Is it safe to use?

Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.

Does it work on my phone?

Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.

Do I need an account?

No. Just open the page and use the tool. There's no sign-up and no email needed.

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