Free Regular Expression (Regex) Tester & Matcher

Test and debug regular expressions in real-time with JavaScript regex engine. Features syntax highlighting, match group extraction, and common pattern presets.

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About Regex Tester & Matcher

Live regular expression evaluator that highlights matches, capture groups, and replacement patterns with support for global (g), case-insensitive (i), and multiline (m) flags.

How to Use Regex Tester & Matcher Online

  1. Enter your regular expression pattern and flags.
  2. Type or paste your test text in the test string area.
  3. View live highlighted matches, match counts, and capture group tables.

Frequently Asked Questions

Which regular expression dialect is used?
Standard ECMAScript (JavaScript) regex dialect with full Unicode property escapes support.