Validation

Regex Tester

Build and test regular expressions with immediate match feedback to speed up validation logic for forms, parsers, and search features.

Interactive Regex Tester

Test expressions with flags and inspect matched values and positions in real time.

Matches: 3

  • [0] Next
  • [19] React
  • [26] React

Common use cases

  • Validate user input patterns in forms.
  • Test extraction patterns for logs and plain text.
  • Debug edge cases with grouped and flagged expressions.

Quick start

  1. Write or paste a regular expression.
  2. Add test input and toggle flags.
  3. Inspect matched groups and refine the expression.

Related guides

Regex Made Easy: Top Online Tools to Test Your ExpressionsWhy TypeScript is No Longer Optional for Modern Web Projects

FAQ

Does it support regex flags?

Yes. Common flags like global, multiline, and case-insensitive can be toggled during testing.

Can I test capture groups?

Yes. Group results are surfaced so you can verify extraction logic quickly.

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