infoz

Regex Tester

Test JavaScript regular expressions with capture groups and flags.

Edit the pattern, flags, and test string. Matches and capture groups update live.

Matches

  • [0] index 12: hello@infoz.com
    groups: ($1: hello) ($2: infoz.com)
  • [1] index 31: partners@example.org
    groups: ($1: partners) ($2: example.org)

About this tool

Compiles your pattern with the browser's RegExp constructor. Flags supported: g (global), i (case-insensitive), m (multiline), s (dotAll), u (unicode), y (sticky). Errors from RegExp construction are surfaced inline.

All processing happens entirely in your browser — no input is sent to our servers.