Round Corners Tool
Add smooth rounded corners to any image in-browser.
How to use
- 1 Drop an image onto the box, or click to choose a file.
- 2 Drag the Corner radius slider to set how round the corners are.
- 3 Use 100% on a square image for a full circle crop.
- 4 Click Download PNG to save with transparent rounded edges.
About Round Corners Tool
The Round Corners Tool turns the sharp rectangular edges of any picture into soft, rounded corners — perfect for avatars, app icons, product shots, thumbnails and cards.
Drop in a JPEG, PNG, WebP or GIF and it is decoded and reshaped entirely inside your browser, with a single slider controlling how much the corners curve.
The radius is expressed as a percentage of the image’s shorter side, so the same setting looks consistent whatever the dimensions: 0% leaves the original square, a small value gives a gentle card-style rounding, and 100% on a square crops it all the way to a perfect circle.
Because the corners are cut with the Canvas API’s clipping path, the curves stay crisp and anti-aliased at every size, and the area outside them becomes genuinely transparent rather than filled with white.
The tool always rebuilds from the untouched original at the current radius, so you can drag the slider freely without stacking any quality loss.
Every step runs locally, so your images are never uploaded, stored or logged — safe for private photos and client work — and it keeps working offline once loaded.
The download is a lossless PNG that preserves the transparent rounded edges, ready to drop straight onto any background.
FAQ
Is the background really transparent?
Yes. The area outside the rounded corners is fully transparent in the exported PNG, so it sits cleanly on any background.
Is my image uploaded anywhere?
No. The picture is reshaped with the Canvas API inside your browser, so it never leaves your device.
How do I make a circle?
Set the radius to 100% on a square image. For non-square images the radius is capped at half the shorter side.