Why round your image corners?
Rounded corners signal modernity and approachability in visual design. Every major operating system now defaults to rounded corners for app icons, profile photos, and cards precisely because sharp corners feel harsh next to the smooth curves of modern typography and UI. When you round the corners of a product photo or portrait, it immediately fits more naturally into any app or website layout.
Profile pictures are the most common use case. Social networks crop avatars into circles on their own, but when you prepare a circular or rounded-square avatar yourself, you control exactly which part of the image sits at the center and how tightly it is cropped. Giving a square photo a 50% radius before uploading ensures the face or logo is positioned perfectly before the platform applies its own crop.
For developers and designers, rounded PNGs are also useful as placeholder images, card thumbnails, and inline content images that need to blend into rounded-corner containers without relying on CSS border-radius. The transparent corners in the output file mean the image looks correct on any background color without adding extra CSS.
Output format note: The tool always outputs PNG because JPEG cannot store transparency. The rounded corner areas are truly transparent, not white.
Round corners in three simple steps
The entire process runs in your browser. No file leaves your device.
Upload your image
Drag your photo onto the drop zone or click to browse. JPG, PNG, and WebP are all accepted.
Adjust the radius
Drag the radius slider. 0% gives sharp corners. 50% on a square image creates a perfect circle. The preview updates as you drag.
Download the PNG
Click Download to save the result as a PNG with transparent corners. Ready to use anywhere.
Getting the best results
Square images make perfect circles
For a circular avatar, crop your image to a 1:1 ratio first using the Image Cropper, then apply 50% radius here.
Start with a high-resolution source
Rounded corners are smoother on higher-resolution images. Avoid applying rounding to small thumbnails that will be enlarged later.
Use a transparent background app to check corners
Open the downloaded PNG in a browser tab or on a colored background to verify the corners are genuinely transparent, not white.
Add a border after rounding
Use the Add Border tool on the rounded image to create a framed, card-style look with matching rounded corners.
Keep the original for editing
The tool outputs only PNG. Keep your original file if you need to re-edit at a later date in a different format.
App icon sizing
iOS app icons should be 1024x1024px. Apply about 22% radius to match the system corner style before submission.
Frequently asked questions
Why does the tool always output PNG?
JPEG does not support transparency. The rounded corner areas must be transparent, which requires PNG format. Any JPG you upload will be converted to PNG in the output.
What does 50% radius mean exactly?
At 50%, the corner radius equals half the length of the shortest side of the image. On a square image, the four corners meet to form a perfect circle. On a landscape image, you get a stadium or pill shape.
Will the file size increase?
The PNG output is often larger than a JPEG source because PNG is lossless. If file size is critical, compress the output PNG afterward using the Compress PNG tool.
Can I use the rounded image directly as a profile picture?
Yes. Most platforms accept PNG files. Pre-rounding your photo gives you control over framing before the platform applies its own circular crop.
Does the tool work on non-square images?
Yes. Non-square images get rounded corners at all four corners based on the radius you set. The shape will be a rounded rectangle rather than a circle.