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Regex Tester

Test regular expressions online with live match highlighting

//
2 matches
Contact us at hello@lazyblink.com or support@lazyblink.com for help.
Match 1"hello@lazyblink.com"at index 14
Match 2"support@lazyblink.com"at index 37
Browser-based, files never uploaded Instant results Works on any device

How to use Regex Tester

  1. 1Enter your regex pattern
  2. 2Add flags (g, i, m, s)
  3. 3Type test string below
  4. 4Matches highlight in real time

About this tool

Test and debug regular expressions (regex) online with live match highlighting. Shows all matches, groups, and indices. Supports all JS regex flags.

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Frequently asked questions

What regex flavour is used?

JavaScript (ECMAScript) regular expressions.

Can I test multiline patterns?

Yes — use the m flag and s (dotAll) flag for multiline matching.