Local · Private · Free

Image Compare Slider

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

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

After opacity50%

Gap14px

Split position50%

Labels

Show labels

Before label

After label

Style

Divider width3px

Divider color

Letterbox fill

Export

Include labels Include divider line

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. Drop a before and an after image and drag a divider across them to reveal the difference. Choose slider, crossfade, or side-by-side view, customize labels and divider color, then export the exact view as PNG. Because everything happens locally on your device, your files are never uploaded to a server. No sign-up or installation required. Like every free tool by Digital Heroes, it is 100% free with no limits.

What you can do

Drag a before/after slider across two images to reveal differences at any position.

Crossfade between images using an opacity slider to blend them at any ratio.

Side-by-side view in vertical or horizontal layout, with an adjustable gap.

Edit "Before" and "After" labels and include them in the exported PNG.

Export a full-resolution PNG of the current view or a clean side-by-side card.

Letterbox mismatched sizes automatically so any two images can be compared.

How to use Image Compare Slider

Open Image Compare Slider in your browser. No signup needed.

Drop your before image on the left box and your after image on the right, or drop both files at once on either box.

Choose a view mode: Slider, Crossfade, or Side-by-side. Adjust the divider, labels, and colors.

Click Download view PNG to export the current view, or Side-by-side PNG for a clean comparison card.

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. Your images never leave your device and nothing is sent to a server.

Does it work offline?

Yes. Once the page has loaded it keeps working offline. You can also install it as an app from your browser for quicker access.

Do I need to install anything or create an account?

No. Just open the page and start comparing images. Installing it as an app is optional.

What does Image Compare Slider do?

It lets you load two images and compare them using a draggable slider divider, a crossfade blend, or a side-by-side layout. You can add custom labels, adjust the divider color and width, and export the result as a PNG, all without uploading anything.