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CSS border-radius generator

CSS & UI generators

Create custom rounded corners visually and copy exact border-radius CSS shorthand.

Updated

Corner controls

Adjust each corner independently.

Preview and CSS

border-radius: 16px 16px 16px 16px;

Quick start

How to build border-radius CSS

Move each corner slider and copy the shorthand value.

  1. Step 1
    Set corner values

    Adjust top-left, top-right, bottom-right and bottom-left independently.

  2. Step 2
    Inspect shape

    Use the live preview to verify your card or button silhouette.

  3. Step 3
    Copy output

    Paste the generated border-radius shorthand into your CSS.

In-depth guide

CSS border-radius generator

Create custom rounded corners visually and copy exact CSS values instantly.

Value order

The four-value shorthand is top-left, top-right, bottom-right, bottom-left.

UI best practices

  • 8-16px for cards and inputs.
  • 20-32px for hero blocks.
  • Use asymmetric radii sparingly to avoid visual noise.

When to use it vs alternatives

Use this tool for quick browser-based work when you need an answer or output immediately. Use a dedicated application or automated workflow when you need bulk processing, approvals, or repeatable production rules.

Common pitfalls

  • Check the result before replacing the original input.
  • Watch for unit, format, encoding, and browser memory limits on large inputs.
  • Keep a copy of important source material until the output is verified.

Privacy and security

Browser-first by design. The tool page explains any exception before you use it.

Your input is handled in the browser wherever the tool can process it locally. EpitomeTool does not add an upload step unless a tool page explicitly says so.

Frequently asked questions

Can I control corners separately?

Yes. Each corner has its own slider and updates in real time.

Does this support percentages?

Current output is pixel-based for predictable UI design. Percentage mode can be added in a later sprint.

Is any data uploaded?

No. All calculations run locally in your browser.

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