Test Regex Online

A Test Regex Online tool lets you quickly test, validate, and debug regular expressions (regex) directly in your browser. It helps developers, testers, and learners ensure their regex works correctly.

Simply enter your regex pattern and test string into the input fields. The tool will instantly highlight matches, show results, and help you identify any errors.

Yes, it is completely free with no hidden fees, registration, or limitations.

No registration is required. You can test regex patterns immediately without creating an account.

Yes, this tool supports multiple regex flavors, including JavaScript, Python, Java, PHP, C#, and PCRE.

Absolutely. All processing happens client-side in your browser. Your test strings and patterns are never sent to external servers.

Yes, the tool efficiently handles complex patterns and large test strings, providing real-time feedback and highlighting matches.

Yes, it is ideal for learners and beginners. You can experiment with different patterns, flags, and test strings to understand how regex works.

Yes, matches are highlighted in real-time, making it easier to debug patterns and see which parts of the string are captured.

Absolutely. This Test Regex tool is perfect for web developers, QA testers, and software engineers who need to validate and debug regex patterns efficiently.