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About Image Round Corners
This image round corners tool adds rounded effects using the Canvas 2D API locally. It draws a rounded clipping path via CanvasRenderingContext2D arcTo, renders the image onto the clipped canvas, and outputs a PNG with transparent corners. The radius is customizable from 1px to 50% of the shorter side (maximum circle).
How to Use
- Open the Image Round Corners tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
Use Cases
- Avatar rounding — Add rounded corners or crop to circle for user avatars, matching social platform and IM app display styles.
- Product image polish — Add uniform rounded corners to e-commerce product images for visual consistency in product listing pages.
- Thumbnail styling — Add rounded corners to blog or document thumbnails for softer, more aesthetically pleasing page layouts.
- Card layout design — Add rounded corners to card-layout images, matching rounded card border styles for consistent UI design.
- Poster design — Add large rounded corners to poster images for a modern design aesthetic with visual depth.
FAQ
What is the maximum radius?
The maximum is 50% of the image shorter side, producing a complete circle. Values above 50% are clamped to the maximum circle effect.
What is the output format?
PNG to preserve the transparent alpha channel in corner areas. JPEG does not support transparency and is unsuitable for rounded images.
Does it affect image clarity?
No. The tool only modifies the alpha channel in corner regions; resolution and color space are fully preserved without scaling or compression.
Can it batch-process multiple images?
Currently it processes one image at a time. For batch rounding, upload and process each image individually.
Are images uploaded?
No. All rounding runs locally via the Canvas API; images never leave your device, safe for private photos.
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