Rounded Corners
Round an image's corners with an adjustable radius. Runs entirely in your browser.
Round an image's corners
Upload an image, then drag the slider to set how rounded the corners should be. The preview updates instantly.
Drag & drop an image here, or click to browse
Supports JPG, PNG and WEBP.
Preview
Your image is processed locally in this browser tab using the Canvas API. It is never uploaded to Calcooo or any server.
How to use this tool
- Drag and drop an image into the box above, or click to browse and select one.
- Drag the corner radius slider to set how rounded the corners should be.
- Check the live preview — the checkered pattern shows where the image is now transparent.
- Click Download image to save the result as a PNG.
FAQ
Frequently asked questions
Is my image uploaded anywhere when I round its corners?
No. The rounding is done locally in your browser using the Canvas API. It never leaves your device.
Why does the result download as PNG even if I uploaded a JPG?
Rounding the corners leaves transparent areas outside the rounded shape, and only PNG supports transparency — JPG would fill those corners with a solid color instead.
What happens at a very high radius?
The shape approaches a rounded pill or oval — this is expected.
Will this work well on a busy background?
Rounded corners look best against a plain or transparent background since the cut corners simply become transparent, not blended into anything.