Image Round Corners
ImageAdd rounded corners to images with a customizable radius and transparent PNG output. Set the radius apply the same settings to a batch Great for avatars.
Drop image or click to upload
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About Image Round Corners
This image round corners tool adds rounded effects to images using the Canvas 2D API locally in your browser, so your originals are never uploaded. It draws a rounded clipping path via CanvasRenderingContext2D arcTo, renders the image onto the clipped canvas, and outputs a PNG with naturally transparent corners. The radius is adjustable from 1px up to 50% of the shorter side (a full circle), so you can go from a subtle 15% corner to a soft card look to a complete circular avatar. Two practical notes: as a rule of thumb a 15-25% radius of the short edge looks most balanced for a plain rounded square, and because JPEG does not support alpha, exporting rounded corners only makes sense as PNG, which is what this tool produces by default. Output preserves full resolution and color since only the corner alpha channel changes. Perfect for avatar cropping, product thumbnails, app icons and social graphics that need a soft modern look. It pairs well with the image compressor to shrink the result for faster web loading, and lets you keep a consistent corner style across an entire asset set.
How to Use
- Open the Image Round Corners tool
- Upload the image file
- Adjust the output options as needed
- Click the Process button; results appear in real time
- Copy or export the result
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's shorter side, producing a complete circle. Values above 50% are clamped to the maximum circle effect.
What radius should I use?
For a plain rounded square rather than a circle, a 15-25% radius of the short edge looks most balanced; larger radiuses give a softer, card-like feel.
Which output format is used?
PNG, to preserve transparency in the corner areas. JPEG has no alpha channel and would turn rounded corners white, so it is not used here.
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 with the same radius to keep the style consistent.
Are images uploaded?
No. All rounding runs locally in your browser via the Canvas API, so your images never leave your device, even sensitive ones.