CSS Border Radius Generator – Custom Borders & Rounded Corners Free

About the CSS Border Radius Generator

The CSS Border Radius Generator lets you build complete CSS borders visually, combining border style, width, color, opacity, and independent per-corner radius control in one live preview. Choose from 10 border styles, link or unlink each corner’s radius, apply borders to all sides or a single side, and copy production-ready CSS or SCSS instantly.

It’s built for developers and designers who want precise control over rounded corners and border styling without manually calculating four separate radius values. Pair it with the CSS Box Shadow Generator to add depth to your bordered element, or the Color Converter to match your border color to an existing brand palette.

The BigToolSite Team tested every border style, corner-linking combination, and shorthand toggle in this tool to confirm the generated CSS matches the live preview exactly.

How to Use the CSS Border Radius Generator

• Pick a border style: solid, dotted, dashed, double, groove, ridge, inset, outset, hidden, or none.
• Set the width, color, and opacity of the border.
• Adjust each corner’s radius individually, or keep Link all corners checked to apply one value to all four.
• Choose whether the border applies to all sides or just one (top, right, bottom, left).
• Select CSS or SCSS syntax, then click Copy Code to grab the result.

Example Usage

Input: Style: Solid, Width: 2px, Color: #2563eb, Opacity: 100%, Radius: 12px on all corners

Output:

.border-box {
  border-radius: 12px;
  border: 2px solid rgba(37, 99, 235, 1.00);
}

Uncheck Link all corners and set a different radius per corner to create asymmetrical shapes, useful for speech-bubble or organic card designs.

Frequently Asked Questions