Online and offline regular expression tester
Enter a pattern, choose its flags and inspect matches in real time. All text is processed in your browser.
Test workspace
Matches
Enter a pattern and text to begin.
How to test a regular expression
- Enter the pattern without surrounding slashes.
- Enable flags such as g, i, m, s, u or y.
- Inspect matches and test the replacement before using it in code.
Privacy and offline use
Your pattern and text never leave the device. The tool needs no API and can be opened offline after the first visit.