About image compare
Comparing two images side by side, or with a slider, shows what changed. It helps when checking edits, compression quality or different versions of a design.
What to look for
- Blocky patches or banding that appear after heavy compression.
- Colour shifts between two exports.
- Small changes in layout or text between design versions.
Use pictures of the same size
Differences are easiest to see when both pictures have the same dimensions. If the sizes differ, resize one first so the content lines up.
A worked example
To judge compression, load the original on the left and a 70% quality copy on the right. Drag the slider across smooth areas such as skies and skin. Blocky patches or colour banding show where quality has dropped too far.
Tips
- Zoom to 100% to see detail instead of judging from a thumbnail.
- Compare files made from the same source image.
- Check both the file sizes and how they look before picking one.
