Test regex patterns in real time
Validate patterns quickly before adding them to application code.
About This Tool
Regex Tester lets you experiment with patterns and flags against sample text so you can debug matching behavior faster.
Key Features
Test regex patterns in real-time
Highlight all matches
Support for flags (g, i, m, etc.)
Show match groups
Instant feedback
How to Use This Tool
- Enter a regex pattern and test text.
- Choose flags like g, i, or m.
- Run test and inspect all matches.
Why Use This Tool
- Reduces regex trial-and-error in code.
- Shows exact matches clearly.
- Great for validation and parsing tasks.
Pro Tips
- Test edge cases with your pattern
- Use the i flag for case-insensitive matching
- Escape special characters properly
- Test with realistic sample data
Frequently Asked Questions
What regex syntax does this use?
It uses JavaScript RegExp syntax.
Why do I get no matches?
Check pattern, flags, and escaping in your expression.