OVERLAY CROP GUIDE
How to Overlay Two Images Online for Comparison
Updated June 19, 2026
An image overlay places one photo above another with adjustable transparency. It is one of the fastest ways to inspect retouching changes and framing differences.
What an overlay reveals
A transparent overlay exposes movement, resizing, missing objects, retouching changes, and small differences in crop. It is more precise than switching between browser tabs.
Simple workflow
Upload the reference image first and the comparison image second. Reduce the second layer opacity, then move or zoom it while watching for doubled edges. Hide and show the layer to confirm the result.
When to use more than two images
Multiple layers help compare several revisions, color grades, progress dates, or generated variations. Keep only the current reference fully visible and lower the opacity of the layer you are aligning.
Privacy advantage
A browser-based tool can process local image files without sending them to a remote server. This is useful for personal portraits, client previews, and unpublished work.
FAQ
Does overlaying merge the images?
No. The opacity is only for positioning. Each layer is exported as a separate crop.
How many images can I overlay?
This editor supports up to five images at the same time.
Overlay image crop editor
Upload your original and edited photos, lower the top image opacity, then align facial features or fixed background points. Every exported image uses the same crop ratio and pixel dimensions.
Start cropping