Regex Tester

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Test regular expressions with live highlighting

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How to Use Regex Tester

  1. 1Enter your regular expression
  2. 2Select flags (g, i, m, s, u)
  3. 3Paste test text
  4. 4Matches are highlighted in real time

Frequently Asked Questions

What regex engine is used?

JavaScript native RegExp engine, compatible with most modern regex features including lookaheads, groups, and Unicode.

What flags are supported?

Global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) flags.