CSS Triangle Generator
Craft pure CSS geometric triangles and tooltip arrows with zero images or external dependencies.
How does the CSS border triangle trick work?
By giving an HTML element zero width and height, its entire visual shape is dictated by border intersections. Making three borders transparent and coloring the fourth renders a pixel-perfect triangle.
Ideal for Tooltip Arrows and Dropdowns
Pure CSS triangles are lightweight, resolution-independent, and widely used for pseudo-elements (::before / ::after) on popovers and accordion indicators.