CSS Triangle Generator
Generate pure CSS border triangles pointing in any directional angle.
CSS Button Generator
About CSS Triangle Generator
The Pure CSS Border Triangle Generator calculates exact `border-width` and `border-color` geometric rules to render solid, zero-pixel-element triangles pointing Up, Down, Left, Right, and diagonal corners with zero SVG or image assets.
How to Use CSS Triangle Generator
Step 1
Select triangle pointer direction.
Step 2
Enter desired width and height dimensions in pixels.
Step 3
Pick a color.
Step 4
Click "Copy CSS" and apply to a zero-width element or `::after` pseudo-element.
Practical Use Cases for CSS Triangle Generator
Dropdown Menu & Tooltip Pointer Arrows
Generate crisp triangular arrows for popovers, navigation dropdowns, and speech bubbles using pure CSS.
Accordion & Collapsible Expand Indicators
Build directional arrow indicators pointing right (collapsed) and down (expanded) for FAQ accordions.
Input & Output Examples
Generating Top-Pointing Triangle
Direction: Up, Width: 20px, Height: 10px, Color: #1F2937
width: 0;\nheight: 0;\nborder-left: 10px solid transparent;\nborder-right: 10px solid transparent;\nborder-bottom: 10px solid #1F2937;
Key Features & Performance
- ✓Directions: Up, Down, Left, Right, Top-Left, Top-Right, Bottom-Left, Bottom-Right.
- ✓Interactive Width and Height controls with live orientation preview.
- ✓Supports equilateral, isosceles, and right-angled triangle geometry.
- ✓Outputs Vanilla CSS, Tailwind arbitrary values, and pseudo-element (`::after`) snippets.
- ✓100% Client-Side generation.
- ✓1-Click Copy CSS.
Key Terminology & Definitions
CSS Border Triangle Trick
A classic CSS technique where setting `width: 0; height: 0` and using transparent borders on three sides reveals a solid triangular corner.
Isosceles Triangle
A triangle with two equal-length sides, commonly used for symmetrical UI pointer arrows.