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About Compare Images
Compare Images — free, private, browser-based image tool
Drop two images and slide between them — perfect for before/after. It runs in your browser, so the file is processed on your own device.
Why use Compare Images
- ·Files stay on your device — nothing is uploaded
- ·No signup needed
- ·Works in any modern browser, on any OS
- ·Free daily use; Pro removes limits and watermarks
How to use it
- 1Drop a JPEG, PNG, WEBP, AVIF file on the page, or click to choose one.
- 2Pick the options you want.
- 3Copy or save the result.
What Compare Images does
Drop two images and slide between them — perfect for before/after.
How it works
Uses Canvas2D and WebGL2 with OffscreenCanvas for parallel processing. Filters run as GPU shaders where supported, falling back to CPU SIMD via WebAssembly. The processing code runs inside the page, so your file is not uploaded to a server — you can confirm this in your browser's DevTools → Network tab.
Frequently asked questions
Does Compare Images upload my files?+
No. Compare Images runs in your browser and processes the file on your device. Nothing is sent to our servers.
Is Compare Images free?+
Yes, with a daily free allowance and no signup. Xonvert Pro ($4.99/month) removes the daily limits and the watermark on exported files.
Do I need to install anything?+
No. It works in any modern browser on Windows, macOS, Linux, ChromeOS, Android and iPad.
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