Round Image Corners

No. This tool uses the Canvas API and createImageBitmap() to process images entirely in your browser. Your files never leave your device. This makes it safe for sensitive screenshots, confidential documents, or personal photos.

The actual corner radius is automatically limited to half your image's smallest dimension. If you set 500px radius on a 400px wide image, you'll get 200px radius (a perfect circle on that edge). This prevents geometric impossibilities where curves would overlap.

Yes. Toggle "Individual" mode to control each corner separately. Set any corner to 0px to keep it square. Common patterns include rounding only top corners for card designs or only one corner for speech bubbles.

PNG preserves transparency in the rounded corners—use this when placing your image over varying backgrounds. JPEG fills corners with your selected background color and offers smaller file sizes for photographs. JPEG does not support transparency.

Scale multiplies your output resolution. Use 2× or higher when creating assets for high-DPI displays (Retina MacBooks, modern smartphones) or when you need print-quality images. The corner radius scales proportionally so proportions stay correct.

For PNG/WebP: The background only fills transparent areas in your source image. Corners remain transparent. For JPEG: The background fills all rounded corners since JPEG has no transparency. Choose white for clean documents, black for dark mode designs, or a brand color for marketing materials.

Currently, images are processed one at a time for the live preview. However, your settings (radius, format, scale) persist between files—just drop a new image to apply the same styling instantly.

PNG and WebP with transparency often increase in size because the "empty" corner areas still store alpha channel data. JPEG typically decreases in size due to simpler geometry. Use WebP with quality adjustment for best size-to-quality ratio.

The tool processes the first frame only. Animated GIFs are not currently supported for output. For animated content, extract a frame first or use a dedicated GIF editor.

Your browser's memory limits apply. Most devices handle images up to 8192×8192 pixels. Extremely large images may cause slowdowns or crashes. For best performance, use images under 4000 pixels on the longest side.

Yes. Click "Copy to Clipboard" to copy the processed image directly. This uses the Clipboard API when available, falling back to copying the data URL as text in older browsers. Paste into design tools, documents, or chat apps that support image paste.

The checkered pattern represents transparency—it's a standard design convention showing where your image has no background. Switch to "Dark" or "Light" preview backgrounds to see how your image looks against solid colors.

Set all corners to a radius equal to or greater than half your image's smallest dimension. For a 400×400 image, use 200px or more. For non-square images, this creates an ellipse or "squircle" shape.

WebP typically produces 25-35% smaller files than PNG with identical quality. Use WebP for web projects where browser support is acceptable (all modern browsers). Use PNG when maximum compatibility with older software is required.

The live preview updates instantly as you drag sliders—no need to process manually. If you've already downloaded, simply re-upload the original and apply new settings. The tool never modifies your source file.