Regex Tester
Test and debug regular expressions with real-time matching and highlighting.
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About this tool
Build and test regex patterns with real-time match highlighting, named groups, substitution mode, and a library of common patterns. Export as code snippets for JS, Python, PHP, and Go.
Frequently Asked Questions
Enter your regex pattern and test string. The tool highlights matches in real-time, shows capture groups, and flags any syntax errors. Use the patterns library for common regex templates like email, URL, phone validation.