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Regex Tester — Free Online, No Upload Needed

Test JavaScript regular expressions against sample text with match highlighting and groups.

Data & DevFreeNo upload

Open the interactive regex tester tool — free, runs in your browser.

About this regex tester

Debug email, phone or log-parsing patterns against sample text with live match counts and highlighting, plus instant feedback on invalid patterns and bad flags.

How to use

  1. Type a pattern and flags.
  2. Paste sample text.
  3. Review highlighted matches and the match count.

Regex Tester FAQ

Which flavor?

JavaScript (ECMAScript) RegExp, with g/m/i/s/u/y flags.

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