How do pure CSS triangles work?

CSS triangles work by setting an element with 0 width and 0 height, and applying thick borders where three sides are transparent and one side is colored.

Can I generate diagonal corner triangles?

Yes! You can choose from 8 directions: Top, Bottom, Left, Right, Top-Left, Top-Right, Bottom-Left, and Bottom-Right.

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Developer Utilities

CSS Triangle Generator

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How to Use CSS Triangle Generator

Choose the pointing direction (e.g. Top, Bottom, Diagonal).
Adjust the width and height sliders to resize your triangle.
Pick your desired triangle fill color.
Click Copy CSS to paste the lightweight CSS snippet into your project.

Frequently Asked Questions

How do pure CSS triangles work?: CSS triangles work by setting an element with 0 width and 0 height, and applying thick borders where three sides are transparent and one side is colored.
Can I generate diagonal corner triangles?: Yes! You can choose from 8 directions: Top, Bottom, Left, Right, Top-Left, Top-Right, Bottom-Left, and Bottom-Right.

Sources & References

Primary references: MDN: CSS gradients; W3C CSS Syntax Module Level 3.

Review policy: references and behavior notes are checked whenever the tool implementation changes.