How to use
- Select or drop an image (JPG, PNG, or WebP).
- Drag the corner-radius slider from 0% to 50% to set how rounded the corners are.
- Check the live preview on the checkerboard to see the transparent corners.
- Download the result as a transparent PNG.
Frequently asked questions
What image formats can I use?
You can load any standard image your browser reads, including JPG, PNG, and WebP. Whatever the input format, the rounded-corner result is always saved as a transparent PNG.
Why is the output always a PNG?
Rounded corners need transparency where the old square corners were, and PNG supports an alpha channel. JPG cannot store transparency, so the result is always downloaded as a PNG.
Is my image uploaded to a server?
No. The corners are clipped locally in your browser on a canvas, and nothing is ever uploaded. Your image never leaves your device.
How is the corner radius measured?
The radius is a percentage of the image's shorter side, from 0% up to a maximum of 50%. At 50% the ends become fully circular, so a square image turns into a circle.
Will rounding the corners reduce image quality?
No. The image is drawn at its original resolution and only the corners are clipped, so the rest of the picture is untouched and stays sharp.
Can I round the corners of several images at once?
This tool rounds one image at a time. Load an image, set the radius, download the PNG, then repeat with the next image.
About this tool
Free online tool to round image corners with an adjustable radius and download a transparent PNG. Runs 100% in your browser — no uploads, your image stays private.