Pure CSS Triangle & Tooltip Arrow Generator
Generate pure CSS border-trick triangles and tooltip carets for all 8 directions.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use Pure CSS Triangle & Tooltip Arrow Generator
Choose from 8 directional angles: Top, Right, Bottom, Left, or Diagonal Corners.
Set exact pixel dimensions for base width and arrow height.
Copy the border-trick stylesheet rule into your CSS or pseudo-element (::after).
Frequently Asked Questions
How do CSS border triangles work?
By setting width: 0 and height: 0, thick border edges meet at 45-degree mitered angles. Setting three sides to transparent and one to a solid color creates a triangle.
Can I use this in CSS pseudo-elements?
Yes, apply the generated CSS properties inside a .tooltip::after or .dropdown::before selector with content: ''.
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