Image Comparison
New이미지 비교 · 사진 전후 비교 · before after · image comparison slider · before after image
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First image
Choose files
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Second image
Choose files
Related: Image Compress · Image Resizer
How to use
Upload two images and pick a comparison mode. Drag the slider left/right to reveal before vs after instantly.
- 1
Add the two images to compare (drag or pick each side).
- 2
Choose a mode: slider, side-by-side, overlay, or synced zoom.
- 3
Drag the slider or adjust opacity/zoom to spot differences; save the comparison as an image if you like.
FAQ
Is this tool free?
Yes — no sign-up, no installation, completely free to use right away.
What is this tool?
Free image comparison tool — slider, side-by-side, overlay (opacity) and synced zoom. Compare before/after edits, compression, or A/B designs. No upload, all in-browser. You can use it for free with no sign-up or installation — just open the page and start right away.
Are my uploaded files sent to a server?
No. Everything runs only on your own computer, inside your browser, and your files are never sent to a server or anywhere else. So you can use it with complete peace of mind, without worrying about your file contents leaking.
Do the two images need to be the same size?
No. Images of different sizes are centered and fit to each pane, so you can compare them as-is.
What is it used for?
Before/after edits, compression quality, A/B designs, resize results — any time you want to hold two images side by side.
Does it work on mobile?
Yes. The slider moves with touch, and every mode works on mobile.
Are my images uploaded?
No. Everything runs in your browser; your images are never sent to a server.