About This Tool
This tool lets you build and test a regular expression against sample text, highlighting every match live and breaking out capture groups, so you can debug a pattern without leaving the browser.
How to Use
- Type your regular expression pattern into the pattern field.
- Toggle the flags you need — g, i, m, s, u.
- Paste your test string into the box below and watch matches highlight live.
- Check the capture groups panel if your pattern uses groups.