Skip to content

CSS Triangle Generator (Border & Clip-path)

Generate CSS triangles in eight directions with any width, height and color, using either clip-path or the classic border trick, for arrows, tooltips and decorative shapes.

Direction

CSS code

How to make a triangle with CSS

  1. Choose a direction: up, down, left, right or one of the four corners.
  2. Set the width, height and color.
  3. Pick a method: clip-path or the border trick.
  4. Copy the CSS for your .triangle element or pseudo-element.

clip-path vs the border trick

  • clip-path: a normal box with a polygon() mask. It is easy to read, accepts gradients and background images, and scales with the element.
  • Border trick: a zero-size element where one border is colored and the neighbouring borders are transparent. The borders meet at diagonal angles, which forms the triangle. It works everywhere and is common in older code and tooltip arrows.

Tooltip and dropdown arrows

To add an arrow to a tooltip, put the triangle on a ::before or ::after pseudo-element with content: "" and position: absolute, then place it on the edge of the bubble. Match its color to the bubble's background. With the border method the arrow color must be a solid color; with clip-path it can match a gradient.

Tips

  • Use an equilateral triangle by setting the height to about 0.866 times the width (for example 120 by 104).
  • Triangles drawn with borders cannot have their own border or shadow; stack two triangles, or use filter: drop-shadow().
  • Decorative triangles should be hidden from screen readers with aria-hidden="true" when they are real elements.

Need more corners? The clip-path generator creates any polygon, from hexagons to stars.

More CSS tools

CSS Gradient Generator: Linear, Radial & Conic
Create linear, radial and conic CSS gradients with multiple color stops, a live preview and ready-made presets, then copy the background CSS with a solid color fallback.
CSS Box Shadow Generator with Layers
Design CSS box shadows with multiple layers, inset shadows, blur, spread and opacity, preview them on any background and copy the box-shadow CSS or a Tailwind class.
CSS Border Radius Generator & Blob Shape Maker
Generate CSS border-radius values for all corners, each corner or 8-value elliptical blob shapes in px, % or rem, with a live preview, presets and Tailwind output.
PX to REM Converter (and REM to PX)
Convert px to rem and rem to px with any root font size, turn every px value in a CSS snippet into rem at once, and look up a px to rem table with Tailwind spacing values.
CSS Grid Generator: Visual Layout Builder
Build CSS Grid layouts visually: set columns, rows and gaps, drag across cells to create items that span tracks, then copy the CSS, HTML or Tailwind classes.
CSS Flexbox Generator & Playground
Learn and generate CSS flexbox layouts: try flex-direction, wrap, justify-content, align-items and gap on live items, edit grow, shrink and order, and copy CSS, Tailwind or Bootstrap classes.
Glassmorphism CSS Generator (Frosted Glass)
Create a frosted glass effect with CSS: adjust blur, transparency, saturation, border and radius over colorful backgrounds and copy backdrop-filter CSS that works in every modern browser.
CSS Text Shadow Generator: Neon, 3D & Outline
Generate CSS text-shadow effects with multiple layers: soft shadows, neon glow, 3D, outline, retro and fire presets with a live preview of your own text and colors.
CSS Button Generator with Hover Effects
Design a custom CSS button: colors, font, padding, border radius, border, shadow, hover color and lift effect, with ready-made presets and copy-ready HTML and CSS including focus styles.
CSS Clip-path Generator: Polygon Shape Maker
Create CSS clip-path shapes: triangles, hexagons, stars, arrows, chevrons and more. Drag the polygon points to customize any shape and copy the clip-path CSS.
Cubic Bezier Generator: CSS Easing Functions
Design custom CSS easing with cubic-bezier(): drag the control points, try presets like easeOutCubic and easeOutBack, and compare your curve with ease in a live animation.