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Test and debug JavaScript regular expressions with live match highlighting and capture groups.
Test, validate, and debug regular expressions in real time with match highlighting and capture group details.
Regex pattern, flags, and test string.
Live match highlighting, match count, and group extraction details.
Test email validation regex or extract URL parameters from server logs.
All operations for this tool execute locally in your web browser memory using client-side WebAssembly, HTML5 APIs, or local JavaScript. Your files, text inputs, and generated data never touch our servers.
It uses JavaScript native RegExp engine, supporting lookaheads, lookbehinds, named groups, and unicode flags.
Yes. The match details panel breaks down full matches and numbered or named capture groups.