Image Comparison Slider
Upload two images and drag the slider to compare them side by side.
Image 1 (Before)
Click or drop image
Image 2 (After)
Click or drop image
Compare images with a slider
Visually compare two images by dragging an interactive slider across the overlap. Perfect for before/after comparisons, photo editing results, compression quality checks, and design revisions. Works entirely in your browser.
Frequently Asked Questions
How does the image comparison slider work?
Upload two images (a before and after version) and use the slider to reveal one image over the other. Drag left or right to see exactly where and how the images differ — perfect for comparing compression quality or editing results.
Do the images need to be the same size?
For the best comparison, images should have the same dimensions. If they differ in size, the tool scales them to match so you can still compare visual differences effectively.
Can I compare compression quality?
Yes. A common use case is comparing an original image with its compressed version. Compress your image first using any of our tools, then use this slider to verify the quality is acceptable before using the compressed version.
What image formats are supported?
You can compare images in PNG, JPG, WebP, AVIF, BMP, and GIF formats. The two images do not need to be in the same format — you can compare a PNG original with a WebP compressed version, for example.
This tool works offline — install CompressEazy as an app on any device.