Regex Tester
Test regular expressions against text with real-time matching, group capture, and detailed explanations
Regex
Testing
Pattern
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Regular Expression
/
/
Real-time pattern matching
Test Text
No matches found
0 characters
Highlighted Matches
Enter a pattern and test text to see matches highlighted
Match Details
No matches to display
Replace Tool
Preview:
Enter a replacement pattern to see preview
Quick Patterns
How to Use
This Regex Tester helps you build and test regular expressions with real-time feedback:
🔍 Features
- Real-time matching: See results as you type
- Syntax highlighting: Visual match highlighting
- Capture groups: Extract and analyze groups
- Replace tool: Test replacements with group references
🚩 Flags
- g: Global - find all matches
- i: Case insensitive matching
- m: Multiline - ^ and $ match line breaks
- s: Dot matches newlines
📝 Common Patterns
\d+ - Numbers\w+ - Words\s+ - Whitespace[a-zA-Z] - Letters^ - Start of line$ - End of line.* - Any character+ - One or more💡 Tips
- • Use capture groups () to extract parts of matches
- • Test with various inputs to ensure pattern accuracy
- • Use the replace tool to test substitutions
- • Click quick patterns for common use cases
Privacy: All regex testing happens locally in your browser. No patterns or text are transmitted to any server.
Keyboard Shortcuts
Test Pattern
Ctrl + Enter
Clear Pattern
Ctrl + R
Copy Matches
Ctrl + C
Paste Text
Ctrl + V