Regex Tester
Test and debug regular expressions in real-time with match highlighting, capture groups, and replace mode
Regex Tester
Enter a pattern and test string. Matches are highlighted in real-time.
Quick Presets
Email
URL
IPv4
Phone (US)
Date (YYYY-MM-DD)
Hex Color
HTML Tag
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Tool Features
Real-time regex testing and debugging
Real-time Testing
Matches update as you type with 300ms debounce
Capture Groups
View numbered and named capture group values
Replace Mode
Preview regex-based text replacements instantly
Common Presets
One-click patterns for email, URL, IP, phone and more