Round image corners
Drop an image, pick a corner radius, and download a PNG with transparent corners.
Processed on your device — nothing is sent anywhere.
How it works
- Drop an image into the box above, or click it to browse your files.
- Drag the radius slider — the preview updates live on a checkerboard so you can see the transparent corners. Turn on Full circle / ellipse to clip the whole image instead.
- Click Download PNG to save the result.
Frequently asked questions
- Is my image uploaded to a server?
- No. The rounding is done locally in your browser using the canvas element. Your image never leaves your device, and closing the page removes everything.
- Why is the output always PNG?
- PNG supports transparency, which is what makes the rounded corners actually see-through. JPG has no alpha channel, so the cut-away areas would be filled with a solid color instead. If you need a smaller file, convert the result to WebP afterwards — it keeps transparency too.
- How large can the corner radius be?
- Up to half the shorter side of the image. At that maximum the two shorter edges become full semicircles, and a square image turns into a perfect circle. The Full circle / ellipse toggle applies exactly that shape in one click.
- How do I make a circular profile picture?
- Turn on the Full circle / ellipse toggle: a square image is clipped to a perfect circle, and a rectangular one to an ellipse. For a true circle from a rectangular photo, crop it square first, then apply the circle here and download the transparent PNG.
- Does rounding the corners reduce image quality?
- No. The image keeps its original resolution — only the corner pixels are made transparent, and the edge is anti-aliased so the curve looks smooth at any size. Because the output is PNG, the remaining pixels are saved losslessly with no compression artifacts.
About this tool
This tool rounds the corners of any image and saves the result as a PNG with real transparency. Drag the radius slider to control how soft the corners are — from a subtle 8-pixel curve to full semicircles — or flip one toggle to clip the whole picture into a circle or ellipse. The live preview sits on a checkerboard background so you can see exactly which areas will be transparent before you download.
The processing is entirely client-side. Your image is drawn onto an HTML canvas, a rounded-rectangle path is applied as a clipping mask, and everything outside the path becomes transparent. The edge is anti-aliased, so the curve stays smooth rather than jagged. Because no server is involved, the original file never leaves your device — nothing is uploaded, stored, or logged, and the tool works with photos, screenshots, and logos of any size your browser can open.
Rounded corners show up everywhere in modern design, and this tool covers the everyday cases: softening screenshots for documentation, blog posts, or App Store listings; preparing product shots for a website whose cards use curved corners; matching an app-icon style; or creating circular avatars for profiles, team pages, and email signatures. Since the output has a real alpha channel, the result composites cleanly over any background color or pattern without a white box around it.
For the best results, match the radius to how large the image will be displayed: a radius that looks elegant at full size can look overly round when the image is scaled down, so thumbnails usually want proportionally smaller values. Keep the PNG if you need transparency; if file size matters, convert it to WebP afterwards, which preserves the alpha channel at a fraction of the size. And for a perfect circle from a rectangular photo, crop to a square first so the ellipse mode has equal sides to work with.