Image comparison
Compare two images side by side with a draggable before-and-after slider and save the split view as an image. Free, runs in your browser, with no upload.
About Image comparison
The image comparison tool places two images on top of each other with a slider between them. Drag across the picture to reveal more of the first or the second image, which makes small changes in edits, compression or retouching easy to spot.
It is useful for photographers comparing edits, developers checking compressed or resized output and designers reviewing two versions of a mockup. When you find a good split, you can download it as a before-and-after image in PNG, JPG or WebP. Both files stay on your device.
How to use Image comparison
- Drop two images onto the upload box, or add them one after the other; the first is the original.
- Use the arrow buttons to swap the order if needed.
- Drag across the comparison view or use the Position slider to move the dividing line.
- Choose an output format and click Download to save the split image.
Features
- Interactive before-and-after slider for exactly two images.
- Position slider from 0% to 100% for precise placement of the divider.
- Downloadable split-view image in PNG, JPG or WebP.
- Second image is scaled to fit the first image’s dimensions.
- Works with images up to 30 MB each.
Common uses
- Comparing a photo before and after editing or retouching.
- Checking how much detail compression or format conversion removed.
- Reviewing two versions of a design or screenshot.
- Creating a before-and-after image to share with a client.
Tips
- Use images with the same dimensions for an exact pixel-to-pixel comparison.
- Zoom in with your browser to inspect fine detail along the dividing line.
Frequently asked questions
Which image appears on which side?
The first image, labeled Original, shows to the left of the dividing line, and the second, labeled Changed, shows to the right. Swap them with the arrow buttons in the file list.
Can I compare images with different sizes?
Yes. The second image is scaled to fit within the first image’s dimensions while keeping its proportions. For an exact pixel comparison, both images should have the same width and height.
Does the tool highlight differences automatically?
No. It is a visual slider comparison: you move the divider and look for changes yourself. It does not calculate or mark the pixels that differ.
Can I save the before-and-after view?
Yes. The download contains the comparison exactly as split by the slider, at the size of the first image. Move the divider to the position you want, choose PNG, JPG or WebP and click Download.
Is my input uploaded?
Tools run in your browser. Files, text and results are not uploaded to our servers and are cleared when you leave the tool.
Your privacy comes first
Tools run in your browser. Files, text and results are not uploaded to our servers and are cleared when you leave the tool.