Regex Tester

Build, test, and debug your regular expressions with real-time highlighting.

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Match Results 0 matches

How to Use Regex Tester?

  1. Enter Pattern: Type your Regular Expression in the top input field.
  2. Set Flags: Optionally add flags like g (global), i (case-insensitive), or m (multiline).
  3. Test String: Paste the text you want to test in the large text area.
  4. Analyze: Matches are highlighted in real-time. Check the "Match Results" panel for details.

Cheat Sheet

. Any char | \d Digit | \w Word char | [abc] Character set | ^ Start of line | $ End of line | * 0 or more | + 1 or more

Frequently Asked Questions

This tool uses the JavaScript Regular Expression engine. It supports most standard regex features but might behave slightly differently than PCRE or Python regex.
We alternate colors (blue shades) for each match found to help you distinguish between adjacent matches.
Yes! If your pattern contains capturing groups like (abc), you can see the content captured by each group in the breakdown section below the text area.