Free Online Image Border Radius Tool
Easily apply rounded corners to your photos or turn them into perfect circles. Export as transparent PNGs for seamless overlays, or add custom background colors to the corners for solid JPEGs.
- ✓ Adjustable Rounding (0% to 50%)
- ✓ Create Perfect Circle Avatars
- ✓ Transparent PNG Export
- ✓ 100% Private Client-Side Processing
1. Upload Image
Select a Photo
PNG, JPG, WebP supported
How to Use the Image Border Radius Tool
- Upload an Image: Drag and drop your photo into the upload box or click to select a file from your device.
- Adjust the Border Radius: Use the slider to increase or decrease the roundness of the corners. Sliding it to 50% will create a pill shape, or a perfect circle if your image is perfectly square.
- Select Output Format: Choose PNG if you want the rounded corners to be transparent. Choose JPG if you want a smaller file size and prefer to fill the cut-out corners with a solid background color.
- Download: Click the download button to instantly save your freshly rounded image to your device.
Key Features
- Precise Radius Slider: Fine-tune the curvature of your image from a subtle 1% rounding to a full 50% circle/ellipse.
- Alpha Transparency Support: Export perfectly clipped, transparent PNG files that overlay beautifully onto any website background.
- Custom Corner Backgrounds: Generating a JPG? Pick the exact HEX color to fill the clipped corners so it matches your website's design flawlessly.
- 100% Secure & Local: Your images are processed entirely within your web browser using HTML5 Canvas. We never upload, store, or see your files.
Benefits of Adding Rounded Corners
Rounded imagery instantly makes digital designs feel more modern, approachable, and integrated. While web developers can add border-radius via CSS, physically editing the image file offers several advantages:
- Platform Independence: When you permanently bake rounded corners into your image, it will display correctly across all social media platforms, emails, and presentation software without requiring CSS code.
- Perfect Avatars: Quickly convert square headshots into perfect circular profile pictures ready to be uploaded to forums, team pages, or chat applications.
- Email Marketing: Many email clients (like older versions of Outlook) notoriously fail to render modern CSS properties. Hardcoding the border radius into the image file guarantees it looks perfect for every subscriber.
Common Use Cases
- Profile Pictures (Avatars): Taking a standard headshot and applying a 50% border radius to create a classic circular avatar.
- App Icons & Logos: Giving a sharp, square logo the standard "squircle" look used by iOS and Android applications (typically around 15-22% border radius).
- Presentation Decks: Softening the harsh edges of screenshots before dropping them into PowerPoint or Google Slides presentations.
- Email Newsletters: Ensuring images align with modern UI trends without relying on complex, highly-incompatible HTML/CSS email code.
Format Comparison: PNG vs JPG
| Format | Transparency Support | Corner Behavior | Best Used For |
|---|---|---|---|
| PNG | Yes | Corners become completely transparent. The image will blend onto any background. | Avatars, logos, graphics to be placed over colored web backgrounds or gradients. |
| JPG | No | Corners are filled with your chosen "Corner Background Color" (default white). | Photographs placed on a solid white (or specific color) website background to save file size. |
Expert Tips
- Making a Perfect Circle: The border-radius slider is based on percentages. If you want a perfect circle, you must upload an image that is a perfect square (1:1 aspect ratio) and set the slider to exactly 50%. If the image is a rectangle, 50% will result in an oval/pill shape.
- Matching JPG Backgrounds: If you must use JPG for file size reasons, use the color picker to select the exact HEX code of your website's background. The image will appear to have transparent corners when placed on your site!
- Consistency is Key: If you are creating a grid of team headshots for an "About Us" page, pick a specific radius (e.g., 15%) and apply it consistently to all photos for a clean, uniform look.
Frequently Asked Questions (FAQ)
This usually happens when you export as a JPG, or upload a transparent PNG to a website that doesn't support transparency and forces a black background. To fix this, export as a JPG and set the "Corner Background Color" to white (or match your website's color).
First, ensure the image you upload is a perfect square (e.g., 500x500 pixels). If it is a rectangle, crop it to a square first. Once uploaded here, drag the Border Radius slider to exactly 50%.
No. This tool utilizes HTML5 Canvas technology to process the image directly within your web browser. Your images never leave your device, ensuring total privacy and fast processing times.
No, the tool simply mathematically clips the edges of your image. The internal pixels remain untouched and retain their original high-resolution quality upon export.
PNG files support an alpha channel, which allows the clipped corners to be completely transparent. This is essential if you plan to place the rounded image over a colorful background, a pattern, or a gradient on your website.
Conclusion
The Free Online Image Border Radius Tool is a simple yet powerful utility for preparing images for the web, email, and social media. By baking rounded corners directly into the image file, you ensure complete compatibility across all platforms without relying on complex CSS code, saving you time and guaranteeing pixel-perfect designs.