Regex for strong password validation in JavaScript
This pattern uses lookaheads to require at least one lowercase, one uppercase, one digit, and one special character across 8+ characters. Test candidate passwords live below.
/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$/Try it live
The pattern and sample strings below are pre-loaded. Edit anything, or describe a variation in plain English and generate your own.
/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$/valid ✓One sample per line. Tested live on the JavaScript engine — other flavors are validated and flagged for differences, not executed.
No samples.