4 Corner StylesComponent Radius ControlExport ReadyAI Ready

Radius Builder

Create consistent border radius scales and radius tokens for components, design systems, and AI-ready UI.

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HOW IT WORKS

How to Use Radius Builder

Create a consistent border radius system in minutes, from corner personality to export-ready design tokens.

  1. 1

    Choose a corner style

    Start with Sharp, Subtle, Rounded, or Pill to define the overall corner personality of your design system.

  2. 2

    Adjust component radii

    Customize border radius for buttons, cards, inputs, modals, alerts, and other components when needed.

  3. 3

    Fine-tune the radius scale

    Modify semantic radius steps from none to full, or use advanced controls to precisely tune roundness.

  4. 4

    Preview across layouts

    Test your radius system in component previews, website layouts, and comparison mode to ensure consistency.

  5. 5

    Export your tokens

    Export radius tokens as CSS variables, Tailwind config, JSON, or AI prompts for development workflows.

WHY RADIUS BUILDER

More Than a Basic Border Radius Generator

Most border radius tools generate a single CSS value. Radius Builder helps you create a complete radius system with semantic scales, component rules, live previews, and AI-ready exports for consistent UI design.

4 Corner Personalities

Start with Sharp, Subtle, Rounded, or Pill presets to instantly define the visual personality of your interface corners.

Semantic Radius Scale

Generate a consistent radius scale from none to full, making rounded corners predictable across every component and layout.

Per-Component Overrides

Adjust border radius independently for buttons, cards, inputs, modals, alerts, and other UI components when needed.

Live UI Preview

Preview radius changes in real time across components, full website layouts, and comparison views before exporting.

Radius Health Checks

Validate hierarchy, progression, consistency, and balance to avoid random or visually inconsistent corner styles.

Export for Development

Export radius tokens as CSS variables, Tailwind config, JSON, and AI prompts for production-ready workflows.

Unlike generic rounded corner generators, Radius Builder creates a complete border radius system for modern design systems and AI-generated UI.

Radius Builder FAQ

Common questions about border radius systems, rounded corners, and radius tokens for modern UI design.

What is a border radius system?
A border radius system is a structured set of corner radius values used consistently across UI components like buttons, cards, inputs, and modals. Instead of using random rounded corner values, a radius system creates visual consistency throughout a product.
What is the difference between Sharp, Subtle, Rounded, and Pill styles?
Sharp uses minimal or no corner rounding for a clean and formal look. Subtle adds slight softness while staying professional. Rounded creates a friendlier modern interface, while Pill uses fully rounded corners for bold and playful UI styles.
What is a pill or full radius?
Pill or full radius refers to extremely large border radius values, commonly 9999px, which force elements like badges, chips, avatars, and tags into fully rounded shapes regardless of their size.
Should all components use the same border radius?
Not always. Components should follow the same radius system, but they do not need identical values. For example, buttons may use medium radius while modals and cards use larger radius to preserve hierarchy and visual balance.
Should I use px or rem for border radius?
Both work. Px offers precise control and is common for radius values. Rem improves scalability when working with token-based design systems. Radius Builder supports both output formats.
Can I export radius tokens for Tailwind or AI coding tools?
Yes. Radius Builder lets you export radius tokens as CSS variables, Tailwind configuration, JSON tokens, and AI-ready prompts for tools like ChatGPT, Claude, and Cursor.

After defining your border radius system, build spacing, shadows, and color tokens to create a consistent visual language.

Spacing Builder Design consistent spacing scales. Shadow Builder Build an elevation system. Palette Builder Build accessible color systems.