Regex Pattern Tester & Debugger - Test Regular Expressions Live
Advanced regular expression testing tool for developers and data analysts. Test, debug, and validate regex patterns with live matching, group capture, and flag support. Features include real-time pattern matching, match highlighting, group extraction, and comprehensive flag options. Privacy-focused - all pattern testing happens in your browser, no data is stored or transmitted.
Key Features
- Live regex pattern matching with instant feedback
- Match highlighting and group capture visualization
- Support for all standard regex flags (global, case-insensitive, multiline, etc.)
- Named and numbered capture group extraction
- Pattern explanation and debugging assistance
- Multiple test cases and batch testing
- Privacy-safe - patterns never leave your browser
- Copy matches and groups to clipboard
Use Cases
- Data validation and input sanitization
- Log parsing and text extraction
- Search and replace operations development
- Pattern matching for data processing
- Form validation rule creation
- Educational regex learning and experimentation
Regex Tester
Test and debug regular expressions with live pattern matching. Enter your regex pattern and test text to see matches, capture groups, and validation results in real-time.
Regex Tester
Build, test, and debug regular expressions with live preview. See matches in real-time as you type.
Sample patterns:
Regex Pattern
Flags
Test String
Total Matches: 0
No matches found in the test string