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Image Rounded Corners
Drag files here orclick to upload
2 files, max 5M each
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Tool description
Image Rounded Corners is a completely free, no-install online rounded-corner tool that is ready to use instantly with no sign-up. Upload an image to add soft rounded corners to square avatars, product images or UI assets. It supports both pixel and percent units, independently adjustable corner radius, and batch processing. Everything runs locally in your browser with 100% privacy — your images are never uploaded to any server — and you can download high-quality PNG rounded images in one click, on par with professional design software.
How to use
- Upload images
Click "Add file" or drag images into the upload area; batch upload of multiple images is supported.
- Set corners
On the right, choose the unit (pixel / percent) and set the corner radius.
- Batch toggle
To apply the same settings to all images, turn on the batch process toggle.
- Start processing
Click "Start" and wait for the local browser processing to finish.
- Download files
After processing you can download the current image directly, or click "Download all" to save every rounded image.
Use cases
- Avatar beautify: add rounded corners to a square avatar for a softer look
- Card images: unify product images, covers and cards with rounded corners
- UI assets: batch-generate rounded UI assets
- Social sharing: add rounded corners to share images to fit various platform card styles
Key advantages
- Completely free
No sign-up required; open the page and use it with no feature limits.
- Privacy safe
All processing runs locally in your browser; images are never uploaded to any server, protecting your privacy 100%.
- Flexible units
Both pixel and percent units are supported — pixel is a fixed size, percent adapts to the shorter side, fitting different sizes.
- Lossless HD output
Output is lossless PNG that preserves transparency; the area outside the rounded corners stays transparent.
- Batch efficiency
Add rounded corners to a batch in one click, apply the same parameters to all images, and download as a ZIP.
Unit and radius explained
- Pixel mode: the corner is a fixed pixel value regardless of image size, ideal for precise control.
- Percent mode: corner radius = shorter side × percent ÷ 100, so larger images get larger corners and adapt better.
- Range: the radius is automatically limited to half the shorter side to avoid invalid shapes.
- Transparency: output as PNG keeps transparent areas; the region outside the rounded corners stays transparent for easy overlaying.
- Batch consistency: after enabling batch processing, the current unit and radius are applied to all images.
FAQ
Common browser-decodable formats like JPG, PNG, WebP are supported; output is PNG.
Pixel is a fixed corner size; percent is computed from the shorter side, so larger images get larger corners and adapt better.
The tool automatically limits the radius to half the shorter side to avoid invalid shapes.
Output is PNG and keeps transparency; the area outside the rounded corners stays transparent for easy overlaying.
Images are processed entirely in your browser and are never uploaded to any server — feel free to use it.
The radius is automatically limited to at most half the shorter side; just enter the value you want and the tool applies the safe cap.
The formula is corner radius = shorter side × percent / 100; e.g. shorter side 1000px and 20%, the corner is 200px.
Yes. After turning on the batch process toggle, the unit and radius you set for the current image are applied to all images; click "Download all" to get them.
Output is PNG lossless, keeping transparency for further editing or overlaying.
Yes. The page is responsive and works in mobile browsers for upload, settings and download.
No. Rounded corners only replace the square corners with arcs; the canvas size stays the same and the image is not compressed.
Common sizes are supported; very large images are limited by browser memory, so keep each file under tens of MB for a smooth experience.
Content last updated：2026-07-10
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