Regex Tester
Test regular expressions with live matches.
Highlighted matches:
About this tool
Test JavaScript regular expressions live. See highlighted matches and match counts as you type.
Key Features
- Live matching & highlighting
- Custom flags (g, i, m, s)
- Match counter
- Safe error handling
How to Use
- Enter your pattern and flags.
- Type a test string.
- See matches highlighted instantly.
Benefits
- Build & debug regex fast
- Learn regex interactively
- Validate patterns before coding
Frequently Asked Questions
It uses the JavaScript (ECMAScript) regex engine, the same one in your browser and Node.js.