Test regex patterns with flags, group captures, and live matches.
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.
Type your regular expression pattern and toggle flags (global, case-insensitive, multiline).
Paste the sample input strings you wish to match against the pattern.
View highlighted matches, capture groups, and replacement outputs in real time.
It uses the native JavaScript RegExp engine conforming to ECMAScript standard specifications.
Yes, full support for named/unnamed capture groups, lookaheads, and lookbehinds is supported.
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