Perform regex find & replace with capture groups ($1, $2) and flag controls.
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.
Write your search regular expression with optional capture groups.
Use $1, $2, or $& in your replacement template.
Inspect live transformed text and copy the output.
Use $1 for the first captured group, $2 for the second, and $& for the entire matched substring.
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