Regex Tester
Full-featured regex tester with highlight preview and group details.
Examples:
Flags
Valid RegExpValid RegExp
Matches0
Flagsg
0
No preview
0
No matches yet
About This Tool
The regex tester helps developers quickly validate patterns. It supports common flags, match list, capture and named groups, and replace preview. Everything runs locally in your browser for privacy.
Features
- ⚡ Live Matching: Instant parsing and highlight
- 🧩 Flag Toggles: Support g/i/m/s/u/y
- 📚 Rich Examples: Built-in common regex patterns
- 🎯 Match List: Show index, length, and groups
- 🧷 Named Groups: Display named captures
- 🔁 Replace Preview: Live replacement output
- 📋 Copy Results: One-click copy match details