Round Image Corners Online
Add rounded corners to any image instantly. Adjustable radius, preset styles, circle crop. One click download.
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How It Works
Upload Your Image
Drop any image — JPG, PNG, WebP, GIF, or BMP. No size limit.
Adjust Corner Radius
Use the slider or pick a preset — from subtle rounding to a full circle crop.
Download
Download as PNG to keep transparent corners, or JPG with white corners.
How to Round Image Corners
Rounding image corners adds a polished, modern look by replacing sharp 90-degree edges with smooth curves of any radius you choose.
Rounded corners have become a defining visual pattern of modern interface design. From app icons and profile pictures to product thumbnails and social media graphics, curved edges signal a contemporary, approachable aesthetic. The human eye naturally follows curves more comfortably than sharp angles, which is why rounded rectangles feel friendlier and more inviting than their sharp-cornered counterparts. Apple popularized the rounded rectangle as a core design element, and it has since become the default shape language across iOS, Android, and web design.
The corner radius determines how much curvature is applied. A small radius (5-10% of the image's smallest dimension) produces subtle softening that removes the harshness of sharp corners without dramatically changing the shape. A medium radius (15-20%) creates the familiar rounded rectangle seen in app cards and thumbnails. A large radius (30-40%) produces a "squircle" or superellipse shape popular for app icons. At 50%, the corners meet and the image becomes a perfect circle (for square images) or a full oval (for rectangular images).
Understanding Corner Radius
Corner radius is measured as a percentage of the image's smallest dimension. This percentage-based approach ensures consistent results regardless of image size. A 10% radius on a 1000x800 image produces 80px corners (10% of 800, the smaller dimension). The same 10% on a 500x500 image produces 50px corners. This way, the visual proportion of rounding stays consistent whether you're working with thumbnails or high-resolution images.
PNG vs JPG: Choosing the Right Format
When you round corners, the clipped areas become transparent. PNG supports transparency, so downloading as PNG preserves these transparent corners — perfect for layering the image over any background. JPG does not support transparency, so clipped areas are filled with white. Choose PNG when the image will be placed on a colored or patterned background, and JPG when file size matters or the image will always appear on a white background.
Circle Crop
Setting the radius to 50% creates a full circle (or oval for non-square images). This is the standard shape for profile pictures across nearly every platform — LinkedIn, Slack, Twitter, Discord, and GitHub all display avatars as circles. Creating a circular crop ensures your photo looks exactly as intended when uploaded to these platforms, rather than relying on automatic cropping that might cut off important parts of the image.
Rounded Corners Image Use Cases
App Icons
App store guidelines require specific corner radius for icons. iOS uses a superellipse (squircle) at roughly 22% radius. Round your app icon to the exact spec before uploading to ensure it displays correctly across devices and avoids awkward automatic clipping.
Profile Pictures
Most social platforms display avatars as circles. Pre-crop your profile photo to a perfect circle at 50% radius to control exactly what appears, rather than letting automatic cropping cut off your face or important details.
Product Thumbnails
E-commerce product images with rounded corners look more polished and modern in grid layouts. A subtle 5-10% radius softens the presentation without distracting from the product, creating visual consistency across your catalog.
Social Media Graphics
Social posts with rounded corner images stand out in feeds. The softened edges create a more designed, intentional look compared to sharp rectangles, increasing engagement and perceived quality of your content.
Presentations
Slides with rounded corner images look more professional and contemporary. Whether for business presentations, pitch decks, or educational materials, curved edges add a layer of visual refinement that sharp corners lack.
Website Images
Web designers use rounded corners extensively for card layouts, hero images, team photos, and testimonial sections. Pre-rounding images ensures consistent appearance across all browsers without relying on CSS border-radius, which can behave differently on various platforms.
Round Image Corners Tool Features
Adjustable Radius
Fine-tune corner roundness from 0% to 50% with a precise slider control.
Preset Styles
One-click presets for subtle, medium, large, and circle rounding.
Circle Crop
50% radius creates a perfect circle — ideal for profile pictures and avatars.
Transparent Corners
PNG download preserves transparency. Checkerboard preview shows clipped areas.
100% Private
Everything runs in your browser. Images never leave your device.
Unlimited & Free
No limits, no sign-up, no watermarks. Round as many images as you need.
Frequently Asked Questions
Is my image uploaded to a server?
Does rounding corners reduce image quality?
What does the corner radius percentage mean?
How do I make a circle image?
What is the difference between PNG and JPG download?
Can I use this for app icons?
What image formats are supported?
Is there a file size limit?
Does it work on mobile?
Can I round only specific corners?
Why do the corners show a checkerboard pattern?
How many images can I round?
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