Regex Tester

Test JavaScript regular expressions and visualize matches.

Common Patterns:

Matches

No matches found.

Free Online Regex Tester for JavaScript

This free online Regex Tester helps you test your JavaScript regular expressions against any text. It highlights matches in real-time and supports all standard JavaScript flags.

Features

  • Real-time Matching: See matches highlight as you type.
  • JavaScript Engine: Uses your browser's native JavaScript RegExp engine for 100% accuracy.
  • Flag Support: Toggle global (g), case-insensitive (i), multiline (m), and more.
  • Common Patterns: One-click access to regex for emails, URLs, dates, and more.
  • Privacy Focused: All processing happens in your browser. No data is sent to our servers.

Supported Flags

  • g - Global search
  • i - Case-insensitive search
  • m - Multiline search
  • s - DotAll (dot matches newlines)
  • u - Unicode support
  • y - Sticky search