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Debug and test your regular expressions with instant visual feedback. Type your pattern and test string to see matches highlighted in real-time.
Regular Expressions (Regex) can be complex. Our tool simplifies the debugging process:
[a-z0-9]+).Need a specific tool? All Utilexa tools are free, fast, and secure.
g (Global): Finds all matches rather than stopping after the first one. i (Case Insensitive): Ignores case (e.g., [A-Z] matches [a-z]). m (Multiline): Allows ^ and $ to match the start/end of lines, not just the whole string.
This tool uses the standard JavaScript RegExp engine, which is highly compatible with PCRE (Perl Compatible Regular Expressions).
Absolutely. Your test strings and regex patterns are processed entirely in your browser. No data is sent to our servers.
Common errors include unclosed parentheses, invalid escape characters, or quantifying a non-existent group. Our tool provides real-time error messages to help you fix these issues.