AbraCalc

CSS Border-Radius Generator

Shape each corner with independent border-radius sliders and a live preview. Copy the CSS — supports % and px units.

Pure browser JavaScript — generates CSS locally.

Embed this tool on your site

How to use this tool

  1. Drag the slider for each of the four corners.
  2. Switch between % and px units.
  3. Copy the border-radius CSS shorthand.

Shape each corner with independent border-radius sliders and a live preview. Copy the CSS — supports % and px units.

Frequently asked questions

Does this produce shorthand?
Yes — the four values map to top-left, top-right, bottom-right, bottom-left in the standard border-radius shorthand order.

References & sources