Corners look pixelated
Very small radii on a low-resolution image produce visible stair-stepping.
Fix: Increase the source image resolution before rounding, or pick a larger radius.
Round Image Corners
Add rounded corners to any image with adjustable radius and transparent background — export as PNG
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What is Round Image Corners
Last reviewed:
Rounded corners soften the edges of an image by clipping a quarter-circle out of each corner. They give avatars, thumbnails, and cards a friendlier, more modern feel.
Round Image Corners lets you slide the radius from 0 (square) up to half the shortest side (fully circular) and export a transparent PNG.
Why use it
- Match the border-radius aesthetic of your product without touching CSS.
- Create a rounded avatar from any square or rectangular photo.
- Keep transparency where the corners were clipped — no white squares on dark backgrounds.
- All rendering happens in-browser.
Features
- Adjustable corner radius slider
- Transparent PNG output
- Live preview
- Up to fully circular shape
- Drag-and-drop image upload
- Corner clipping runs locally in your browser
How to use Round Image Corners
- Upload. Drop an image into the workspace.
- Set radius. Slide the corner radius to the size you like.
- Export. Click Download to save as PNG (transparent) or JPG (white corners).
Example (before/after)
Square photo
avatar.jpg (400×400, square)
Rounded corners (radius 64px)
avatar.png (400×400, each corner rounded at 64px, transparent outside the rounded shape)
Common errors
White corners on dark backgrounds
Exporting as JPG fills transparent pixels with white.
Fix: Export as PNG to preserve transparency where the corners were clipped.
FAQ
Can I make a perfect circle?
Yes — slide the radius to half of the shortest side on a square image. Rectangular images become stadium-shaped at maximum radius.
Is my image uploaded?
No. The corner clip is done in-browser with the Canvas API.
Does it preserve transparency?
Yes, when you export as PNG. JPG has no alpha channel, so transparent corners become white.
What's the max radius?
Half the length of the shortest side — beyond that, the corners overlap and the shape degenerates.
Related tools
Related image tools: You can also browse the full Image Tools category for more options.
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