Rounded Corners Generator
Apply rounded corners to any image
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Drop an image or click to upload
JPG, PNG, WebP
About this tool
Round the corners of an image by any radius you choose, turning a plain rectangular photo into one with smooth, rounded edges - a common style choice for profile pictures, app icons, and modern UI design.
How to use this tool
- Upload imageAdd the image you want to stylize with rounded edges.
- Adjust corner radiusSet subtle rounding or strong curves based on UI style.
- Preview transparency edgesCheck corner cut-out quality and anti-aliased smoothness.
- Export as PNGDownload with transparent corners preserved for overlay use.
Key features
- Creates modern UI-ready image style in one step.
- Supports transparent corner output for flexible placement.
- Useful for avatars, cards, and app graphics.
- Avoids manual masking work in heavier editors.
Common uses
- Preparing rounded profile images for websites/apps.
- Styling hero cards and UI thumbnails consistently.
- Generating icon-like visuals from rectangular photos.
- Creating polished mockup assets quickly.
Tips for better results
- Use radius proportional to image size for balanced look.
- Export PNG to preserve transparent corners correctly.
- Check final result on both light and dark backgrounds.
- Keep a square source for circular-avatar workflows.
Mistakes to avoid
- Exporting as JPG and losing corner transparency.
- Applying extreme radius that clips important content.
- Ignoring background context where transparent corners sit.
- Using inconsistent radius values across one design system.
Frequently asked questions
Yes - adjust the corner radius from subtly rounded to fully circular (if the radius is large enough relative to the image size).
Yes - the area outside the rounded corners becomes transparent, so the output needs to be saved as PNG to preserve that transparency (rather than JPG, which doesn't support it).
Yes - rounded corners can be applied to any rectangular image, not just squares.
Yes. Rounded Corners is free for normal use with no account required, and ToolBox does not add a watermark to your result.
Most tools in this category run in your browser so the file stays on your device. If a tool needs a temporary server job, files are handled for that job only and are not kept as a lasting archive.
No install needed. Open Rounded Corners in your browser, add your file or paste your input, then download or copy the result.
Yes on modern mobile browsers. For large files, a desktop browser is usually faster and more reliable.
Try a different quality or format setting, use a smaller input, or open a related tool (for example compress before convert). Keep a copy of the original file before replacing it.
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