CSS triangle generator

Set size and direction and copy the CSS.

On your device · No account

Privacy details

CSS triangle 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.

Triangle size (px)

More options

Direction

Color

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 CSS triangle generator

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

Next: CSS variable generator

A worked example

An up triangle uses a colored bottom border and transparent side borders.

Before you use the result

The size controls border lengths. The visible base is twice that value. This is a CSS border shape, not an image file.

Cite this page

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ToolOctopus. “CSS triangle generator.” Updated 2026-09-19. https://tooloctopus.com/css-triangle-generator.

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