RegExp Tester

Regular Expressions (Regex) are incredibly powerful for pattern matching, but notoriously difficult to write and debug. Our Regex Tester provides a live environment to test your JavaScript regular expressions against sample text with real-time highlight feedback.

Features

• Live Highlighting: See exactly which parts of your text match as you type.
• Flags Support: Toggle global (g), case-insensitive (i), and multiline (m) flags instantly.
• Client-Side: Test against sensitive logs or customer data safely, as everything stays in your browser.