Border Radius Generator

The Border Radius Generator is a free online tool that helps you create custom CSS border-radius values with a visual interface. It is ideal for frontend developers and designers who need to round corners, create circles, or design complex shapes. Use it to instantly generate the correct CSS syntax for any element.

How the Border Radius Generator works

  1. 1

    Add Your Content

    Use the interactive sliders to adjust the radius for each of the four corners individually or all at once. You can input specific pixel or percentage values to get the exact shape you need.

  2. 2

    Format Your Data

    The tool calculates the shorthand CSS syntax based on your corner adjustments. It updates a live preview box so you can see the shape morph in real time as you change the values.

  3. 3

    Get Your Results

    Copy the generated CSS border-radius code from the output panel. Paste it directly into your stylesheet to apply the perfect shape to your web elements.

Real-world examples

Social Media Avatar

Input: Top-left 50%, Top-right 50%, Bottom-left 50%, Bottom-right 50%

Results: A perfect circle CSS rule that crops a square image into a round profile picture.

Use case: Frontend developers use this to create circular user avatars in comment sections and profiles.

E-commerce Checkout Button

Input: Top-left 8px, Top-right 8px, Bottom-left 8px, Bottom-right 8px

Results: A uniformly rounded button that feels modern and clickable.

Use case: UI designers use this to style primary action buttons that guide users through the checkout flow.

Blog Comment Box

Input: Top-left 20px, Top-right 0px, Bottom-left 20px, Bottom-right 20px

Results: A custom speech-bubble shape with one sharp corner pointing to the user.

Use case: Bloggers use this to create unique, visually engaging comment thread designs.

SaaS Pricing Card

Input: Top-left 16px, Top-right 16px, Bottom-left 0px, Bottom-right 0px

Results: A card with rounded top corners and sharp bottom corners for a distinct look.

Use case: Web designers use this to differentiate pricing tiers and highlight premium plans.

Newsletter Signup Input

Input: Top-left 30px, Top-right 30px, Bottom-left 30px, Bottom-right 30px

Results: A fully rounded, pill-shaped input field that looks friendly and inviting.

Use case: Marketers use this to design eye-catching email capture forms for landing pages.

Border Radius Generator FAQ

Is an account required to use this tool?

No, you can use this tool instantly without registering or logging in.

Is my data secure and private?

Yes, all processing happens directly in your browser, meaning your design data is never sent to our servers.

Does the tool work offline?

Once the page is loaded, the core generation engine works entirely offline in your browser.

Is there a character or file size limit?

There are no limits, as the tool only processes simple CSS values and visual rendering.

Does it support multiple programming languages?

It generates standard CSS, which is universally supported by all web browsers and frontend frameworks.

How is this different from similar text editors?

Unlike code editors, this tool provides a visual canvas to see the border radius effects before writing code.

What is the technical working principle?

The tool maps your slider inputs to the CSS border-radius shorthand syntax and applies them to a DOM element.

What is the most common use case?

Developers most commonly use it to quickly design rounded buttons, cards, and circular images without memorizing CSS shorthand.

Why use the Border Radius Generator?

  • Visual Shape Building: See the exact shape of your element as you adjust the corner values.
  • Shorthand Automation: Automatically generates the correct CSS shorthand syntax for all four corners.
  • Complex Shapes Made Easy: Easily create asymmetrical shapes and custom UI elements.
  • cross browser Compatible: Generates standard CSS that works perfectly across all modern browsers.
  • browser based Privacy: Keeps your design concepts secure by processing everything locally.
  • Zero Setup Required: Works immediately in any modern web browser without installations.
  • Completely Free: Offers full functionality without hidden paywalls or premium tiers.
  • Clean Code Output: Generates properly formatted CSS ready to be pasted into your project.

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