🔒 Security Tool
Password Strength Checker
Instantly analyze password security. Check entropy, crack time, common patterns, and get actionable tips to create unbreakable passwords.
⚡ Real-time analysis
📊 Entropy calculator
⏱️ Crack time estimation
🛡️ Security checklist
❓ Frequently Asked Questions
What makes a password strong?+
A strong password is long (at least 12-16 characters), includes a mix of uppercase, lowercase, numbers, and special symbols, avoids dictionary words, names, or common patterns, and is unique for each account. Our checker evaluates all these factors.
What is password entropy?+
Entropy measures password randomness in bits. Higher entropy means harder to crack. 60+ bits is considered secure for most purposes, 80+ bits is very strong. Our calculator estimates entropy based on character set size and length.
How is "crack time" estimated?+
We estimate using modern GPU cracking speeds (billions of guesses/second). It's a conservative estimate — real-world time varies based on hash algorithm and attacker resources. Always use a password manager for unique, complex passwords.
Should I use a password manager?+
Absolutely! Password managers generate and store strong, unique passwords for each site. You only need to remember one master password. This is the safest way to manage credentials.