🔍 Regex Tester
Test regular expressions live with match highlighting and capture groups
✓ Runs entirely in your browser — your data never leaves this device
About This Tool
Test regular expressions live: matches are highlighted, counted, and capture groups are listed. Supports all JavaScript flags (g, i, m, ...). A sandbox for writing and debugging regex.
How to Use
- Enter your regex and flags (g by default)
- Paste test text below
- Matches highlight live; the result panel shows counts and groups
FAQ
Which flags are supported?
All JavaScript flags: g global, i case-insensitive, m multiline, s dotAll, and more.
Where are capture groups shown?
The first 10 matches containing groups are listed under the result panel.