The tool offers a slider mode that reveals one image over the other, a side-by-side view, and an overlay mode that highlights pixel-level differences between the two images.

Do the two images need to be the same size?+

No, but they produce the best comparison when they share the same dimensions. If sizes differ the tool scales them to match for the comparison view.

Can I use this to compare before/after edits?+

Yes. This is ideal for comparing original vs edited photos, compressed vs original quality, or any two versions of the same image.

Is this done locally?+

Yes. Both images are processed entirely in your browser. Nothing is uploaded to any server.