Developer utility · Free

Regex Tester

Enter a JavaScript regex literal and test it against sample text without uploading the input. Flags can be adjusted separately.

Uses JavaScript RegExp syntax.

Processing happens in your browser for this tool. Follow the example format shown above when a calculator or generator needs multiple values.

What is Regex Tester?

Test JavaScript regular expressions against sample text with configurable flags, matches and capture-group output in your browser. This utility is designed for quick, practical use without requiring an account.

Common uses

  • Validate patterns
  • Inspect matches
  • Debug capture groups
  • Test global, case-insensitive and multiline behavior

Privacy and processing

V1 utilities in this cluster process input in the browser where practical. The application does not need to transmit the tool input to Software Engine for the core transformation.

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