How to use Rounded Corners Generator online, free

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.

Most people open this because a photo is too big, in the wrong format, or they do not want to install an editor for a two-minute job.

Rounded Corners Generator is a good fit when preparing rounded profile images for websites/apps.

Why this exists

Rounded Corners Generator is built around a few practical wins, not a long feature list:

• 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.

Walkthrough

1. Upload image. Add the image you want to stylize with rounded edges.
2. Adjust corner radius. Set subtle rounding or strong curves based on UI style.
3. Preview transparency edges. Check corner cut-out quality and anti-aliased smoothness.
4. Export as PNG. Download with transparent corners preserved for overlay use.

Jobs it is built for

• 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.

Worth knowing before you start

• 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.

What not to expect

• 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.

Privacy, in one paragraph

Rounded Corners Generator runs in your browser. The file or text you paste stays on your device. There is no account, and nothing is stored on a ToolBox server for this job.

Related tools worth opening next

If this is one step in a longer job, these usually come after it:

• Image Border Adder - Add a custom border or padding to images
• Image Crop Tool - Crop images with fixed or custom aspect ratios
• Remove Background - Professional AI background removal. Server result first, then a second on-device option you can compare and use in the editor

Short answers

Can I control how rounded the corners are?

Yes - adjust the corner radius from subtly rounded to fully circular (if the radius is large enough relative to the image size).

What happens to the corners that get "cut off" - are they transparent?

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).

Does this work on non-square images?

Yes - rounded corners can be applied to any rectangular image, not just squares.

Open the Rounded Corners Generator when you are ready. It is free, and you do not need an account.