Match Results — 0 match(es)
100% Free
No cost, no limits. Test as many regex patterns as you need.
Private & Secure
Everything runs in your browser. Your data never leaves your machine.
Live Results
Instant match highlighting and group extraction as you type.
No Signup Required
Just open and start testing. No accounts, no cookies, no tracking.
Frequently Asked Questions
Is Regex Tester free?▼
Yes, Regex Tester is completely free with no signup required. It runs entirely in your browser with no server-side processing.
Is my data private?▼
Absolutely. All regex matching and text processing happens locally in your browser. No data is ever sent to any server. Your patterns and test strings stay on your machine.
What regex flags are supported?▼
Regex Tester supports the four most common JavaScript regex flags: g (global — find all matches), i (case-insensitive), m (multiline — ^ and $ match line boundaries), and s (dotAll — . matches newlines).