Regex Tester
Test regular expressions with real-time matching and highlighting
About Regex Tester
Test regular expressions against sample text with real-time matching and highlighting. See exactly what your regex matches as you type — perfect for building and debugging patterns.
- ·Real-time matching as you type
- ·Highlights all matches in the test string
- ·Shows match groups and capture details
- ·Runs entirely in your browser — data never leaves your device
Regex Tester FAQ
Does it support regex flags?▼
Yes. You can use flags like g (global), i (case-insensitive), m (multiline), and others.
Which regex flavor does it use?▼
It uses JavaScript's built-in RegExp engine. Most standard regex syntax is supported.
Is my data safe?▼
Yes. Everything runs locally in your browser. No data is sent to any server.
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