Best Free CSS Border Radius Generator
Round element corners visually — per-corner or linked, px/%/em — with live preview and copy.
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Files processed in memory, never stored
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How it works
- Set the corners. Drag each corner slider, or keep Link all corners on to move them together.
- Watch the preview. The live box rounds as you drag; switch px, % or em in Advanced options.
- Copy the CSS. Hit Copy CSS and paste the border-radius rule into your stylesheet.
About this tool
Round the corners of an element exactly how you want them. Drag a slider for each of the four corners — or keep them linked so one slider moves all four — while a live preview box shows the result. Copy the border-radius CSS, which collapses to a single value when every corner matches and expands to the four-value form when they differ. The Advanced options switch the unit between px, % and em, so you can build pill shapes and percentage-based rounding too.
What people use it for
- Round card, button and image corners
- Create a pill or fully-rounded shape
- Set different radii on individual corners
- Use percentage rounding for circles and ovals
Frequently asked questions
Yes. Turn off Link all corners and each slider controls one corner; the CSS then uses the four-value form (top-left, top-right, bottom-right, bottom-left).
With it on, dragging any slider moves all four corners together and the CSS collapses to a single value.
Percentage rounds relative to the box size, so 50% on a square makes a circle and it scales with the element. Pixels give a fixed radius.
Set a large radius on all corners; for a true pill, a radius of half the element height — or 50% — rounds the ends completely.
No. The sliders compute a CSS string locally in your browser.
Completely free, no account and no limits — a client-side tool with nothing to meter.
Yes. It runs in your browser, so CSS Border Radius Generator works on phones and tablets as well as desktop — there is no app to install.
Usually just a few seconds for a typical file — CSS Border Radius Generator starts working the moment you give it your input.
Casual use is unlimited, under a generous fair-use cap that keeps it fast for everyone.
All modern browsers — Chrome, Safari, Firefox and Edge. CSS Border Radius Generator needs nothing installed beyond the browser you already use.