HeroTools / Image
Local · Private · Free

Image Compare Slider

Drop a before and an after image, then compare with a draggable divider, crossfade or side-by-side — and export the comparison as PNG. Nothing is uploaded.

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Drop the BEFORE imageor click to browse
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Drop the AFTER imageor click to browse
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🔒 Files never leave your browser — drop two files on either box to fill both. Mismatched sizes are letterboxed automatically.
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View mode

50%
14px
50%

Labels

Style

3px

Export

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Before & after, without a server

Image Compare Slider letterboxes both pictures into a common frame and lets you scrub a divider across them — drag with the mouse or use the arrow keys. Switch to crossfade to blend them, or side-by-side for a classic comparison card, then export the exact view as a high-resolution PNG. Everything renders locally in your browser. No upload, no watermark, completely free.

About Image Compare Slider

Image Compare Slider is a free, private image tool that runs entirely in your web browser. Before/after slider to compare two images side by side — export the comparison. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for before after, image compare, slider, diff. Like every HeroTool by Digital Heroes, Image Compare Slider is 100% free with no limits.

How to use Image Compare Slider

  1. Open Image Compare Slider — it runs entirely in your browser, with no signup.
  2. Drag and drop your file (or click to browse) — it never leaves your device.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is Image Compare Slider free?

Yes — Image Compare Slider is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Image Compare Slider runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Image Compare Slider do?

Before/after slider to compare two images side by side — export the comparison.

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