About This Tool
A thorough regular expression reference with an interactive tester. Browse patterns by category, search for specific syntax, and test expressions against your own text.
How to Use
- Use the search box to filter patterns
- Browse by category (Character Classes, Anchors, etc.)
- Click “Try” to load a pattern into the tester
- Enter test strings to see matches highlighted
FAQ
Which regex flavor does this use?
The tester uses JavaScript regular expressions. Most patterns are compatible across languages, but some advanced features may differ.
