Before & After Image Comparison Slider
Layer two images and drag the divider to compare before and after. Switch between side-by-side and top-bottom, add labels, save the comparison, and choose how to align images of different sizes. Nothing is uploaded.
- Runs in your browser (no upload)
Before image (reference)
Up to 40 MB per file
After image
Up to 40 MB per file
Choose both a "before" and an "after" image to compare them.
How to use
- Choose the "before" and the "after" image. You can also press "Try sample images".
- Drag on the image or use the slider to move the divider. Switch between side-by-side and top-bottom as you like.
- If the sizes differ, choose how to align the after image (fit inside, fill, stretch or actual size).
- Edit the labels if needed and press "Download comparison image" to save the current view as one picture.
FAQ
Are my images uploaded?
No. Loading, displaying and saving all happen in your browser; the images never leave your device.
Can I compare images of different sizes?
Yes. The before image sets the frame, and the after image is aligned by fitting inside, filling the frame, stretching, or at actual size. When the sizes differ, the tool says so and shows both sizes.
What does the saved image contain?
Both images combined at the current divider position, with the divider line and labels drawn in. It contains no metadata such as EXIF.
Notes & limitations
- What you enter is processed only on this page and is not sent to YUCTS servers.
- The comparison uses the frame of the before image; the after image may be scaled, so use images of the same size to compare fine details.
- Images above the browser limit (about 16 million pixels) are scaled down when loaded.
- The on-screen preview is scaled to at most 1,200 px on the long side; the saved image keeps the frame size.
- Labels are drawn with the fonts installed on your device, so they may look slightly different between devices.
- Only the first frame of animated images is compared. Formats the browser cannot open, such as HEIC/HEIF, are not supported.
Related tools
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