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CSS Tools

CSS Border Radius Generator

Adjust each corner of a box with sliders, in px or %, and copy the shortest border-radius CSS.

Runs in your browser. Nothing you enter is uploaded. Last updated

How to use

  1. Keep corners linked for an even radius, or unlink them to set each one.
  2. Choose px or %.
  3. Copy the CSS.

What this tool does

It writes border-radius in shorthand order (top-left, top-right, bottom-right, bottom-left) and collapses repeated values.

Frequently asked questions

How do I make a perfect circle?

Use a square element with border-radius: 50%.

CSS Box Shadow Generator

Design soft, natural box shadows with up to four layers and a live preview, then copy the CSS.

CSS Gradient Generator

Build linear, radial and conic CSS gradients visually with multiple colour stops and copy production-ready code.

REM to PX Converter

Convert rem values to pixels for any root font size, with a quick reference table.

PX to REM Converter

Convert pixels to rem instantly with any base font size, see a reference table, or convert every px…

CSS Minifier

Minify CSS by removing comments and unnecessary whitespace, and see exactly how many bytes you save.