Free Online Regex Tester
Write and test regular expressions in real time. See matches highlighted instantly, inspect capture groups, and debug complex patterns with ease.
Debug Regular Expressions with Confidence
Regular expressions are powerful but notoriously tricky. This tool gives you instant visual feedback as you type your pattern, highlighting every match in your test string so you can iterate quickly and catch edge cases before they hit production.
Frequently Asked Questions
The tester uses the JavaScript regex engine, which supports standard features like character classes, quantifiers, lookaheads, lookbehinds, named groups, and Unicode property escapes.
Yes. Each match displays its full match along with all numbered and named capture groups, so you can verify that your groups are extracting exactly the data you expect.
The tool provides a breakdown of your pattern, explaining what each token does in plain language. This is especially helpful for learning regex or debugging complex expressions.