Create diagonal corner ribbon banners (PRO, NEW, SALE, BETA) with pure CSS transformations.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
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.
Enter your ribbon text (e.g. PRO EDITION, 50% OFF).
Select badge background color, text color, and Top-Left vs Top-Right corner.
Copy the snippet into your stylesheet and component markup.
The parent card container must have 'position: relative' and 'overflow: hidden' so the rotated ribbon clips cleanly at the card boundaries.
Standard corner ribbons use 45deg (or -45deg for top-left) for symmetrical corner diagonal positioning.
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