Regex Tester & Validator Online
Test regular expressions with real-time validation, match highlighting, and detailed explanations. Debug regex patterns quickly and efficiently.
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About Regex Tester & Validator
Test and validate regular expressions with real-time pattern matching, syntax highlighting, and detailed match analysis. Perfect for developers, data analysts, and anyone working with text processing and pattern matching.
Key Features
- Real-time regex testing and validation
- Comprehensive flag support (global, case-insensitive, multiline, etc.)
- Match highlighting with position information
- Capture groups and named groups support
- Pattern explanation and documentation
- File upload for testing large text files
- Export results in JSON format
- Common regex examples and templates
- Cross-browser compatibility
- Privacy-first design with local processing
Use Cases
- Email and phone number validation
- Data extraction from log files
- Text parsing and transformation
- Input validation for web forms
- Search and replace operations
- Code syntax highlighting
- URL and path matching
- Data cleaning and preprocessing
- Configuration file parsing
- API response validation
Supported Formats
Related Keywords
Regex Syntax Support
This tool supports modern JavaScript regular expression syntax including ES2018+ features like named capture groups, Unicode property escapes, and lookbehind assertions. All processing is done locally in your browser for maximum privacy and security.
Privacy & Security
All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.
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