Test and debug regular expressions with live matching and highlighting. See capture groups, match indices, and pattern flags in real-time. Includes a quick reference cheatsheet and common patterns library for email, URL, phone, and more.
Developer
Regex Tester
Test and debug regular expressions with live highlighting
Try Regex Tester Free
Test and debug regular expressions with live highlighting
Tech Stack
React 19
Tailwind CSS 4
Vite 7
shadcn/ui
Core Capabilities
- Live regex matching with colored highlighting
- Named and numbered capture groups
- Pattern flags: global, case-insensitive, multiline, dotAll, unicode
- Match details with index and group info
- Quick reference cheatsheet
- Common patterns library (email, URL, phone, IP, date)
- Dark/light mode
- 100% client-side
