Compare image pixel differences

Align two images, calculate pixel differences and export a visual difference map with a change ratio. Every file is processed in the current browser and is never uploaded to HarnessTrail.

What it is useful for

  • Design QA
  • Screenshot regression
  • Image version comparison

Supported formats

Input
Two browser-readable images
Output
PNG difference image

How to use it

  1. 01Add the files you want to process with Compare image pixel differences. You can select multiple files or a folder.
  2. 02Adjust the settings on the right and inspect the source and expected result in the preview.
  3. 03Start processing, then download individual results, create a ZIP, or send image results to another tool.

Compatibility and limits

Frequently asked questions

Are files uploaded?

No. Reading, processing and exporting all happen locally in your browser.

Does Compare image pixel differences support batches?

Independent tools process files one by one. Combination tools such as stitching, comparison, GIF and PDF process the selected group together.