Regex Tester and Generator

Test and generate regular expressions with real-time visualization and explanation.

Regex Tester and Generator
//g
Flags:
Enter a regex pattern and test string to see matches

💡 Quick Tips

Tips for working with regular expressions:

  • Start simple: Build your regex pattern incrementally, testing each addition.
  • Use non-capturing groups: When you don't need to extract the matched content, use (?:pattern) instead of (pattern) for better performance.
  • Be careful with greedy quantifiers: The * and + quantifiers are greedy by default and will match as much as possible. Add ? after them to make them lazy.
  • Escape special characters: Use backslash to escape meta-characters when you want to match them literally (e.g., \. to match a period).
  • Use anchors: ^ and $ ensure your pattern matches at the beginning and end of the string, preventing partial matches.
  • Test with various inputs: Include edge cases and unexpected inputs in your testing.
✓ Real-time pattern matching
✓ Visual pattern explanation
✓ Common pattern library
✓ Match highlighting
✓ Regex syntax reference
✓ Pattern sharing capabilities

Why Use This Tool?

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Test regex patterns in real-time

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Understand complex patterns easily

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Debug regex issues quickly

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Learn regex through visualization

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Save and share regex patterns