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