All tools

Regex Tester

Live-test regular expressions against your text.

The quick brown fox jumps over the lazy dog.

9 matches

  • 1.The
  • 2.quick
  • 3.brown
  • 4.fox
  • 5.jumps
  • 6.over
  • 7.the
  • 8.lazy
  • 9.dog

About

Paste a regex and a test string. Matches highlight live. Capture groups are listed. Common flags (g, i, m, s, u) are toggleable. The cheatsheet shows the most-used patterns.

How to use

  1. Type a regex pattern.
  2. Toggle flags (g, i, m, s).
  3. Paste test text. Matches highlight, and groups list below.

FAQ

Which regex flavor?+

JavaScript regex (the same one your browser uses). Mostly compatible with Perl-style regex but lacks lookbehind in older Safari and some advanced features like atomic groups.