CSS Triangle Generator

The CSS Triangle Generator creates pure CSS triangles using the border trick, outputting clean Bootstrap 5 HTML with inline styles you can drop straight into any project. Configure direction, size, and color to get a live preview and copy-ready code. Built for front-end developers, UI designers, and anyone building tooltips, arrows, breadcrumbs, or decorative dividers without image assets.

Configuration

Shape

Triangle Direction

Triangle Size (px)

Triangle Color

Shape Variant

Layout

Wrapper Background Color

Horizontal Alignment

Wrapper Padding

Show Direction Label

Label Text

Label Text Color

Wrapper Border Radius (px)

Code Output

Show CSS Code Block

Code Block Theme

How to Use

1. Choose the triangle direction (up, down, left, right) and size using the controls. 2. Set the triangle color, optional background color, and any wrapper padding or alignment. 3. Preview the rendered triangle and its generated HTML in real time. 4. Copy the HTML snippet and paste it directly into your Bootstrap 5 project.

Why Use This Tool?

Hand-coding CSS triangles with the border trick is error-prone and easy to forget between projects. This tool eliminates trial-and-error by calculating the correct border values instantly, giving you production-ready HTML with zero third-party dependencies and no JavaScript required in the output.

Frequently Asked Questions

What is the CSS Triangle Generator?

The CSS Triangle Generator is a free browser tool that builds pure CSS triangles using the CSS border trick and outputs Bootstrap 5 HTML with inline styles, ready to paste into any project without images or SVG files.

Can I use these triangles as tooltip arrows or callout pointers?

Yes. The generated triangles are zero-width, zero-height elements styled entirely with borders, which makes them ideal as ::before or ::after pseudo-element arrows on tooltips, dropdown menus, and speech bubbles. The output HTML shows a standalone div, but you can copy just the inline style values into a pseudo-element rule in your own stylesheet for even cleaner markup.

Is it free?

Yes — the CSS Triangle Generator is completely free with no signup required. Built by the CanvasBuilder.co team.