Border radius generator

Shape each corner and copy the CSS.

On your device · No account

Privacy details

Border radius generator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

Top left radius (px)

More options

Top right

Bottom right

Bottom left

Your result

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-09-19

Using Border radius generator

Border radius generator gives you the declarations and a live browser preview. Adjust individual values, then copy the CSS into your own selector.

Next: CSS clip path generator

A worked example

Radii 24, 48, 24 and 0 produce top-left, top-right, bottom-right and bottom-left corners in that order.

Before you use the result

CSS may scale large corner radii to fit the element. The preview uses a fixed rectangle; check your final element dimensions.

Cite this page

Citation style

ToolOctopus. “Border radius generator.” Updated 2026-09-19. https://tooloctopus.com/border-radius-generator.

Add an access date if your instructions require one.

Citation formatting uses citeproc-js by Frank Bennett and Citation Style Language styles. Licence and source code.