Image Pixel Diff
Highlight pixels that differ between two same-size images (heatmap overlay).
How to Use
- Drop two images of equal dimensions.
- Adjust threshold; red = differing pixels.
Images
A
Drop image A
—
B
Drop image B
—
Diff heatmap
Notes
Threshold
Channel delta per pixel
Heatmap
Red = diff, black = same
Overlay
Mixes A with heatmap
Alignment
Pixel-aligned; scale match first
% diff
Count / total
Privacy
Local
Frequently Asked Questions
Different sizes?
Both are scaled to match the smaller before diffing.
% diff?
Summary shows differing pixel count.
Common Use Cases
Regression testing
Visual diff across versions.
Compression QA
See where artifacts concentrate.
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