How do CSS triangles work?

Triangles use an element with zero width and height but thick borders. A transparent top, left, and right border with a colored bottom border creates a downward-pointing triangle. The border corners create diagonal lines that form the triangle shape.

Should I use CSS triangles or SVG for arrows?

CSS triangles work well for simple decorative arrows in UI components. SVG is better when you need scaling at multiple sizes, accessibility (title/desc elements), or animation. For tooltips and small UI indicators, CSS triangles are perfectly fine.

Can I make a right-angle triangle with CSS?

Yes. Use different border widths for adjacent sides: a large bottom border and smaller left border creates a right-angle triangle pointing up-right. The generator handles all standard triangle orientations including diagonal variants.

Home ToolsCSS Triangle Generator

CSS Triangle Generator

Name: CSS Triangle Generator
Rating: 4.8 (120 reviews)
Author: DailyDevTools

Generate pure CSS triangles

Direction

Color

Width (px)

Height (px)

CSS Output

width: 0;
height: 0;
border-style: solid;
border-width: 0 50px 100px 50px;
border-color: transparent transparent #fb923c transparent;

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What is CSS Triangle Generator?

Pure CSS triangles and arrows are created by manipulating borders on elements with zero width and height — a classic CSS trick for tooltips, dropdown arrows, breadcrumb shapes, and decorative elements without SVG or image files. DailyDevTools' CSS Triangle Generator lets you configure direction, size, and color visually and copies the complete CSS instantly.

How to use CSS Triangle Generator

1Select the triangle direction: up, down, left, right, or diagonal
2Adjust the size using the width and height sliders
3Pick the triangle color using the color picker
4Copy the CSS (which uses border manipulation to create the triangle) into your stylesheet

Frequently asked questions

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CSS Triangle Generator

What is CSS Triangle Generator?

How to use CSS Triangle Generator

Frequently asked questions

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