Media
4 items
Description
Adds a pixel-level image diff to GitHub's image viewer — next to 2-up, Swipe and Onion Skin. GitHub's image viewer shows you two pictures. It does not show you what changed between them. Pixel Diff adds a fourth mode next to 2-up, Swipe and Onion Skin. It compares the two images pixel by pixel, paints every difference red, and crops the result to the area that actually changed — so a three-pixel shift in a long screenshot is a three-pixel shift you can see, not a picture you have to hunt through. - A threshold slider: raise it to ignore compression noise, lower it to catch everything. - Before / after / diff, and all three side by side, sharing one scale and one crop. - Images that changed size are aligned and compared anyway. - SVG and other vector images are rasterised before comparison. - Works on the images GitHub already loaded — nothing is uploaded anywhere. The comparison runs in your browser, in a background thread. The extension has no server, collects nothing, and sends nothing. It asks for access to one domain: viewscreen.githubusercontent.com, the frame GitHub renders image diffs in. It has no permissions for github.com pages at all, so it cannot see your repositories or your session. Open source: https://github.com/Nemo-Illusionist/gh-pixel-diff