Compare images

Overlay two images as a difference map — changed pixels highlighted over a dimmed base, with the diff percentage.

Compared in this browser. Nothing is sent anywhere.

A and B are drawn to the same canvas size and compared pixel by pixel — changed pixels show red over a dimmed base. If the images differ in size, B is scaled to A's dimensions (differences introduced by scaling are real diffs). JPG/PNG/WebP up to 25 MB each and 25 megapixels compared.

How to use

  1. Choose image A and image B.
  2. Set the sensitivity threshold.
  3. Compare and download the diff PNG.

What it supports

PNG, JPG, or WebP up to 25 MiB each; compared at up to 25 megapixels. If sizes differ, image B is scaled to A's dimensions first, so resizing artifacts show as real differences.

Related tools

Related guides