Regex Tester

Test regular expressions instantly with live match highlighting, flag controls, and instant error feedback — all in your browser.

Real-time matching

g / i / m flag support

Local processing

Examples:

Regex Pattern

Enter your pattern without slashes — flags are controlled below

//g

Test String

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JavaScript RegExp: This tester uses the browser's native RegExp engine — the same one used in Node.js and all modern browsers.

All matching happens locally in your browser. No text or patterns are sent anywhere.