Can I use CSS triangles in pseudo-elements?

Yes. They are commonly applied to `::before` or `::after` pseudo-elements on tooltips and popovers.

Updated: August 2026 • Verified v1.2

CSS Triangle Generator — Border Shapes & Arrow Builder

Creative & DesignDesign

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

CSS Border Hack: width: 0; height: 0; border-width: ...; border-color: transparent transparent [color] transparent;

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Understanding Your Results

Renders an interactive triangle canvas, supports 8 directional orientations, custom dimensions, hex fill color, and generates clean, cross-browser CSS border rules.

Practical Guidance & Next Steps

CSS triangles use `width: 0; height: 0` with transparent borders and one colored border to create lightweight vector-like shapes.

What is this?

A visual design utility that creates lightweight, pure CSS border triangles and tooltip pointers.

How does it work?

1. Select triangle orientation direction (Up, Down, Left, Right, Diagonals). 2. Adjust width, height, and fill color. 3. Copy the pure CSS code snippet in 1 click.

Why use it?

Creates crisp UI carets and speech bubble arrows without external icon fonts or SVG assets.

Technical Scope & Calculation Limitations

Generates standard CSS border-style rules supported by all modern and legacy browsers.

Frequently Asked Questions

When an element has zero width and height with thick borders, the borders meet at diagonal 45-degree angles. Setting three sides to `transparent` leaves one visible triangular wedge.

Windows Desktop & Widget Options