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Regex Tester

Test and debug regular expressions online with real-time matching. Support for multiple regex flavors and explanation mode.

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ℹ️ About Regex Tester

Test and debug regular expressions in real-time. See matches highlighted, capture groups, and explanations. Essential for developers working with text patterns.

💡 Use Cases

Testing regex patterns before coding
Debugging complex expressions
Learning regular expressions
Validating pattern matches
Extracting data from text

📋 How to Use

1

Enter your regex pattern

2

Paste test text below

3

See matches highlighted

4

View capture groups and details

💎 Pro Tips

  • Use flags: g (global), i (case-insensitive), m (multiline)
  • Test with edge cases
  • Start simple and build complexity

❓ Frequently Asked Questions

Regular Expression - a pattern language for matching text.

Check flags, escaping special characters, and pattern logic.

Parentheses () capture part of the match for extraction.