Round image corners
Give photos, screenshots and logos rounded corners with a live preview — from a subtle radius to a full circle. Corners become transparent, so the result drops cleanly onto any background.
100% private: files are processed in your browser and never uploaded to any server.
How it works
- Drop one or more images into the box above.
- Adjust the corner radius with the slider — the preview updates live.
- Click Apply and download your images with transparent rounded corners.
Why rounded corners need transparency
Rounding a corner means removing the pixels outside the curve. Something has to be there instead, and there are only two options: transparency, or a solid colour. Transparency is what you almost always want, because it lets the rounded image sit on any background — a dark page, a coloured card, a photograph — and still look correctly cut out.
That makes the output format part of the operation rather than an afterthought. PNG and WebP support an alpha channel and will keep the corners genuinely clear. JPEG does not, so a rounded JPEG has to fill the corners with a colour, and the moment the background behind it is not that exact colour, four little wedges appear.
Choosing a radius
The radius should be proportional to the image, not a fixed number carried between projects. A subtle softening on a large banner and on a small avatar are different pixel values entirely — around 2 to 5 percent of the shorter side reads as a gentle rounding at any size, while a radius of exactly half the shorter side turns a square into a circle, which is what profile pictures usually want.
Watch the edges of the subject too. Corners that clip into a face, a logo or the end of a line of text look like a mistake rather than a style. If the composition is tight, crop a little breathing room in before rounding.
Good to know
Rounded corners need an alpha channel, so the output is always PNG (or WebP if that is what you started with) regardless of the input format. A JPG in, a PNG out — that is not a quirk, it is the only way for the corners to actually be transparent.
The radius is a percentage of the shorter side, which means the same setting looks consistent across images of different sizes. Push it to the maximum on a square image and you get a perfect circle, which is the usual way to make an avatar.
The clipping is anti-aliased, so the curve stays smooth rather than stair-stepped even at large sizes. If you need a square image to start from, crop to 1:1 first.
Frequently asked questions
What format is the output?
PNG (or WebP if the original was WebP), because rounded corners need transparency and JPG does not support it.
Can I make a fully circular image?
Yes — push the radius slider to the maximum on a square image and you get a perfect circle, ideal for avatars.
Will the corners have jagged edges?
No — the clipping is anti-aliased, so the curve stays smooth even at large sizes.
Can I round a whole batch at once?
Yes. The same radius (relative to each image’s size) is applied to every file, with no limits.
Which format should I save as?
PNG or WebP. Both support transparency, so the corners stay genuinely clear. JPEG cannot store transparency and will fill the corners with a solid colour.