Developer Tools
CSS Box Shadow Generator
Visually generate CSS box-shadows. Adjust offset, blur, spread, and opacity in real-time.
Border Radius Generator
Master modern CSS shape generation with our advanced 8-value border-radius generator. Effortlessly create custom rounded corners, organic fluid blobs, pill buttons, speech bubbles, and distinctive UI container cards. Independently tune all 8 corner values (horizontal and vertical radii), customize border stroke styles, and copy clean, cross-browser CSS code with one click.
Shape Preview
CSS Code
border-radius: 50% 50% 50% 50% / 50% 50% 50% 50%; border: 2px solid #3b82f6;
Border Radius (8-Point)
Horizontal (X) Radius
Vertical (Y) Radius
Border Settings
What is the Border Radius Generator?
The FreeTechLearner 8-Point CSS Border Radius Generator provides an interactive visual canvas to craft custom geometric and organic shapes. It enables web developers to visually tweak all 8 radius parameters (4 horizontal corners + 4 vertical corners), stroke weights, border styles, and colors with real-time feedback, automatically outputting clean, production-ready CSS.
How to Use
- Use the 8 individual corner sliders to adjust horizontal (X) and vertical (Y) radii for each corner.
- Toggle between percentage (%) and pixel (px) units based on your layout needs.
- Adjust the Border Width, Border Style (solid, dashed, dotted, double), and Border Color controls.
- Inspect your shape in real time on the live interactive preview canvas.
- Click the Copy button to copy the complete `border-radius` and `border` CSS code directly into your stylesheet.
Common Use Cases
- Organic Image Masking: Creating fluid, modern blob masks for team photos and hero banners.
- UI Buttons & Badges: Styling modern pill buttons, rounded tags, and notification badges.
- Card Containers: Customizing unique corner cuts for feature cards and testimonial boxes.
- Avatar Frames: Designing rounded square or circular user profile avatars.
- Speech Bubbles: Crafting custom callout boxes and tooltip containers.
- Interactive Hover Effects: Animating border-radius transitions on hover states.
Key Benefits
- Advanced 8-Point Control: Full flexibility over both horizontal and vertical corner curves.
- Real-Time Live Canvas: Instant visual feedback on shape transformations.
- Clean Cross-Browser CSS: One-click copying of standard, prefix-free CSS code.
- Interactive Unit Toggle: Easily switch between percentage and pixel measurements.
- 100% Client-Side & Private: Runs completely in your browser without tracking.
- Fully Mobile Responsive: Designed for desktop monitors, tablets, and smartphones.
Frequently Asked Questions
What is the syntax for the full 8-point CSS border-radius property?
The 8-point border-radius syntax uses a slash (/) to separate horizontal radii from vertical radii: border-radius: [top-left-x] [top-right-x] [bottom-right-x] [bottom-left-x] / [top-left-y] [top-right-y] [bottom-right-y] [bottom-left-y];. For example: border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;.
How do 8-point border-radius values create organic blob shapes?
By specifying asymmetric horizontal and vertical radii for each of the four corners, the curvature along the horizontal axis differs from the vertical axis. When combined, this produces fluid, organic, non-rectangular blob shapes popular in modern web design.
Can border-radius be specified in percentages (%) and pixels (px)?
Yes! Pixel values (px) produce fixed, absolute corner radii that stay constant regardless of element dimensions. Percentage values (%) calculate radii relative to the width and height of the element, making shapes responsive.
How do I create a perfect circle or oval using CSS border-radius?
To make a perfect circle, set border-radius: 50% on a square element (equal width and height). If the element is rectangular, border-radius: 50% creates an oval or ellipse.
How do I create a pill-shaped button in CSS?
To create a pill button, set border-radius: 9999px or border-radius: 50px (a value larger than half the height of the button). This ensures smooth, fully rounded left and right ends regardless of button text length.
Does border-radius clip background images and inner content?
Yes, if you set overflow: hidden; on the container element. By default, background colors and background images are clipped to the border-radius curve, but child elements might overflow unless overflow: hidden; is applied.
Is border-radius fully supported across all desktop and mobile browsers?
Yes! The border-radius property has 100% full native support across Chrome, Firefox, Safari, Edge, Opera, iOS Safari, and Android. Vendor prefixes (like -webkit-border-radius) are no longer needed.
What is the difference between individual corner properties and the shorthand border-radius?
Shorthand border-radius allows setting all corners in a single declaration. Alternatively, you can target specific corners individually using border-top-left-radius, border-top-right-radius, border-bottom-right-radius, and border-bottom-left-radius.
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