ImageDiff

Drop two versions of an image and see exactly what changed: a heat map, the share of pixels that differ, and boxes around each change.

Runs in this tab. Nothing is uploaded. Works offline.

ImageDiff heat map of two versions of a sample dashboard, with boxes around the changed number, bar and status dot — What you'll get, shown on the tool's own sample

Two imagesA is the original, B is the new version

Before · A

Drop image A

the original. PNG, JPG, WebP, GIF or BMP

After · B

Drop image B

the version to compare. PNG, JPG, WebP, GIF or BMP

No images handy? A before and after pair is drawn right here in your browser.

Any image your browser can open (PNG, JPG, WebP, GIF, BMP). Images larger than 1400 px on a side are scaled down before comparing. If the two sizes differ, both are stretched to the same size, so the diff is approximate. You can pick both images at once in the first slot.