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CSS Triangle Generator
Border-code speech bubbles and arrows.
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About CSS Triangle Generator
Pick direction and size to generate the classic border-trick CSS triangles.
📐 Methodology & Reference Accuracy:
Calculations, formulas, and conversions execute locally in your web browser. Output models are benchmarked against official reference standards and updated for 2026.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Background reading: Css Triangle on Wikipedia. More: all developer tools.
Frequently Asked Questions about CSS Triangle Generator
Which triangle directions can I generate?
Up, down, left and right triangles plus chevron arrows. Pick a direction, size and color, then copy the generated border-trick CSS straight into your stylesheet.
How is the CSS triangle actually made?
With the classic border trick: a zero-size element with thick colored borders on some sides and transparent borders on the rest renders as a triangle. The generator writes that CSS for you so you never hand-tune border widths.
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Sep 9, 2026
CSS Triangle Generator: Pointers Without a Single Image File
Border-code speech bubbles and arrows.
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