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Border Radius Playground

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Welcome to the Border Radius Playground, the ultimate interactive tool for creating complex CSS shapes with full control over each corner. Easily preview your design live, tweak border-radius values, and instantly export the CSS for your projects.

Whether you're a web designer, front-end developer, or hobbyist, this tool gives you the freedom to experiment with custom corners, presets, and gradients, making your UI elements unique and visually appealing.

This interactive border-radius editor lets you adjust each corner independently, link or unlink sides, and experiment with units (pixels or percentages). You can apply randomized values, reset to defaults, or save your own custom presets for future use.

With live preview and CSS export functionality, you can see exactly how your shapes will appear in the browser, and copy ready-to-use code to your website or project. This makes it perfect for creating buttons, cards, containers, or any element that requires a unique shape.

Take advantage of this tool to experiment, learn, and enhance your CSS skills, while keeping your designs optimized, flexible, and visually striking.

How to Use

  1. Adjust each corner’s border-radius using the sliders or number inputs for precise control.
  2. Toggle the Link corners checkbox to synchronize horizontal or vertical values across corners.
  3. Set your unit to pixels (px) or percentages (%) depending on your layout needs.
  4. Modify the box size, background, and border to match your design preferences.
  5. Use the Copy CSS button to export your live shape to your project instantly.
  6. Optionally, save your current design as a preset for future use or apply pre-made presets from the list.

Tips / Guide

  • Experiment with both horizontal and vertical radii independently to create unique, organic shapes.
  • Use percentages for responsive designs that scale with the container.
  • Leverage presets as a starting point and customize them for your project.
  • Combine gradients, background colors, and borders to make your shapes visually striking.
  • Remember to preview in the live preview panel before copying the CSS to your codebase.

Why It Matters

Complex shapes and custom border-radius designs enhance the visual appeal of your website and improve user experience. This tool lets you experiment without writing CSS manually, reducing errors and saving development time. It ensures your elements are precise, responsive, and consistent across all devices.

Who Should Use This Tool

  • Web designers and front-end developers looking to create unique UI components.
  • Content creators and marketers who want visually engaging shapes for blogs, landing pages, or social media.
  • UX/UI enthusiasts experimenting with CSS shapes for personal projects.
  • E-commerce site managers designing product cards, buttons, and banners with custom curves.
  • Anyone who wants to save time while generating precise CSS for complex border-radius designs.

  

Create complex border-radius shapes (each corner independent), preview live and export CSS. URL: /border-radius-playground/

x px
Presets
Soft pill
Circle-ish
Blob left
Diagonal
Swoosh
border-radius: 20px 20px 20px 20px / 20px 20px 20px 20px
CSS
/* CSS will appear here */
Live values
--

FAQs & Tips

  • Border Radius Playground is an interactive tool that allows you to create complex CSS shapes by adjusting each corner independently, preview them live, and export the CSS code.
  • Use the Link corners checkbox to synchronize either horizontal or vertical values across corners. Uncheck it to adjust corners individually.
  • Yes, you can switch the unit to percentages (%) for scalable, responsive shapes that adapt to container sizes.
  • Absolutely — you can save any design as a preset and reuse it later, or start from the provided preset shapes.
  • Click the Copy CSS button to copy the live CSS code for your shape and paste it into your project.
  • Yes, Border Radius Playground is completely free and accessible for designers, developers, and enthusiasts.

Advanced FAQs & Pro Tips

  • Uncheck the Link corners option and adjust each corner's horizontal and vertical values independently to create unique, asymmetric designs.
  • Use px for fixed-size shapes and % for responsive designs that scale with the container.
  • Apply CSS gradients in the background field. The preview updates in real-time, showing the gradient clipped to your border-radius shape.
  • Yes, use the save button to store presets, which can be edited, updated, or copied to other projects.
  • Stick to standard CSS syntax. Most modern browsers fully support border-radius: horizontal / vertical; notation.
  • Absolutely. You can animate the border-radius properties in CSS transitions or keyframes to create morphing shapes.
  • Use consistent ratios between horizontal and vertical corner values, and experiment with percentages for smooth, scalable curves.
  • Yes, copy the generated CSS and convert values into framework-specific utilities or custom classes as needed.

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