Drop two images to compare them pixel by pixel
Compare Images — Engineering
Upload two images and see exactly which pixels changed. Highlighted diff image. From €9.99/mo.
How to compare images
- Upload your first image.
- Upload the second image.
- Every changed pixel is highlighted in the diff output. Adjust the tolerance slider to filter rendering noise.
Key features
- Pixel-by-pixel comparison — every changed pixel detected
- Adjustable tolerance to ignore anti-aliasing and rendering noise
- Diff overlay shows the exact location of every change
- Unlocks with Pro — €9.99/mo, unlimited comparisons
Common uses
- Catch rendering differences between browser versions or OS environments
- Compare a design mockup to the implemented screenshot pixel by pixel
- Validate image asset changes between build outputs
Frequently asked questions
How do I compare images online?
Upload your first image. Upload the second image. Every changed pixel is highlighted in the diff output. Adjust the tolerance slider to filter rendering noise.
Are my files private when I use this tool?
Yes. All comparison runs locally in your browser. Your files never leave your device and are never sent to any server — not a policy promise, but an architectural fact. There is no server receiving your data.
No AI means no hallucinations
Compare Files uses a deterministic, logic-based engine — not a language model. It reports every change that is actually in your files, and never invents one.
Your files never leave your device. Everything runs in your browser — no uploads, nothing stored.
No AI, so no hallucinations. A deterministic engine reports every real change and never invents one.
No upload, no server wait. Comparisons run locally and keep working offline once the page has loaded.