Test regular expressions against text.
This free regex tester lets you check JavaScript regular expressions against sample text in real time. Toggle global, case-insensitive and multiline flags and see every match highlighted. Your pattern and text stay in your browser — nothing is uploaded.
Enter your regular expression pattern, paste sample text, and select the flags you need. Matches are highlighted automatically as you type.
The tool supports Global (g), Case-insensitive (i) and Multiline (m) — the most common JavaScript RegExp flags.
Yes. It uses the browser's native JavaScript RegExp engine, so results match what you get in Node.js and modern browsers.