Regex Tester & Debugger

Test, validate, and debug regular expressions with live feedback and match highlighting. Perfect for data validation, text processing, and pattern matching development.

//g
Status:Enter a regex pattern

🚀 Features:

  • • Live Testing: Real-time regex validation and matching
  • • Match Highlighting: Visual highlighting of matched text
  • • Detailed Results: Match positions and capture groups
  • • Flag Support: Global, case-insensitive, multiline, and more
  • • Quick Examples: Pre-built patterns for common use cases
  • • Error Detection: Clear error messages for invalid patterns

✅ Common Use Cases:

  • • Email Validation: Validate email address formats
  • • Phone Numbers: Extract and validate phone numbers
  • • URLs: Match and extract web addresses
  • • Data Extraction: Parse structured text and logs
  • • Input Validation: Form field validation patterns
  • • Text Processing: Search and replace operations

💡 Regex Quick Reference:

Character Classes:

  • \d - Any digit (0-9)
  • \w - Word character (a-z, A-Z, 0-9, _)
  • \s - Whitespace character
  • . - Any character (except newline)
  • [a-z] - Any lowercase letter

Quantifiers:

  • * - Zero or more
  • + - One or more
  • ? - Zero or one
  • {n} - Exactly n times
  • {n,m} - Between n and m times

🎯 Pro Tips:

  • • Use the Global flag (g) to find all matches, not just the first
  • • Test with multiple examples to ensure your pattern works correctly
  • • Use capture groups () to extract specific parts of matches
  • • Be specific - overly broad patterns can match unintended text
  • • Use online regex resources for complex patterns
  • • Remember to escape special characters with backslashes