FREE DEVELOPER TOOL
Online Regex Tester
Test and validate regular expressions with real-time highlighting, match details, and capture groups. Perfect for developers, data analysts, and anyone working with pattern matching.
Live match highlighting
Pattern validation
Real-time preview
Capture groups
Instant results
Privacy-first
Pattern & Input
g=global, i=ignore case, m=multiline
Match Highlighting
0 matches
Match Details
Enter a regex pattern to see matches
Frequently Asked Questions
Why Use Our Regex Tester?
- • Real-time testing: See matches instantly as you type
- • Visual highlighting: Clearly see what your regex matches
- • Capture groups: Analyze grouped matches and backreferences
- • Flag support: Test with global, case-insensitive, and multiline flags
- • Privacy-focused: All processing happens in your browser
- • Free forever: No registration or payment required
Common Regex Use Cases
- • Email validation: Validate email address formats
- • Phone numbers: Extract and validate phone number patterns
- • URLs: Match and extract web addresses
- • Data extraction: Parse structured text and logs
- • Input validation: Ensure user input meets requirements
- • Text processing: Find and replace text patterns