About this tool
Before
→
After
This tool puts two versions of an image in the same frame with a draggable divider between them: the left side shows the before image and the right side shows the after image, so you can sweep across the photo and spot exactly what changed. A Swap button flips the two images instantly - perfect for showing off edits, retouches, and upscaling results.
The two images do not need to be the same size: the frame follows the before image and the after image is scaled to fill it. When you are done comparing, the download button saves a side-by-side PNG of both images. Everything is drawn on an HTML5 canvas in your browser - your photos are never uploaded to a server.