Generate secure, random 16-character passwords. 105 bits of entropy — excellent strength. Everything runs in your browser.
Use ⌘ + D to bookmark this toolA 16-character password is the gold standard recommendation from NIST, Google, and most cybersecurity professionals. With 105 bits of entropy using the full character set, it is effectively uncrackable by brute force — the required computation exceeds the energy output of the sun over billions of years. This is the length most password managers generate by default.
Entropy is calculated as: length × log₂(pool_size). With 16 characters from the full 95-char printable ASCII set, you get 105 bits of entropy. Brute-force time at 10 billion guesses/sec: 84 trillion years.
50 pre-generated examples. Use the generator above for a cryptographically fresh password — these are for illustration only.
1Password generates 16-character passwords by default. Bitwarden defaults to 14 but recommends 16+. Google's Advanced Protection Program recommends 16+ characters. AWS recommends 16+ for root account passwords. Most SIEM and security tools default to 16-character generated passwords.
The password that protects your password manager vault should be at least 16 characters. This is the one password you need to memorize — consider using a passphrase of 4-5 random words instead.
Your main email account is the single point of failure for all other accounts. A 16-character password with hardware 2FA makes your email virtually impenetrable.
AWS, GCP, Azure console access, Kubernetes clusters, and CI/CD pipelines. These control production systems and customer data. 16 characters is the industry standard.
Hot wallet passwords and exchange account passwords protecting digital assets. Unlike traditional banking, stolen cryptocurrency is usually unrecoverable.
| Length | Entropy | Crack Time (GPU) | Rating | Recommended For |
|---|---|---|---|---|
| 6 chars | 39 bits | 3.5 seconds | Weak | temporary or throwaway accounts only |
| 8 chars | 53 bits | 1.3 days | Fair | low-security accounts where the site enforces rate limiting |
| 10 chars | 66 bits | 117 years | Good | general-purpose accounts and social media |
| 12 chars | 79 bits | 1.1 million years | Strong | general accounts |
| 14 chars | 92 bits | 10 billion years | Strong | sensitive accounts |
| 15 chars | 99 bits | 894 billion years | Excellent | business accounts |
| 16 chars | 105 bits | 84 trillion years | Excellent | master passwords |
| 20 chars | 132 bits | 7 × 10²¹ years | Overkill | master passwords |
| 24 chars | 158 bits | 6 × 10²⁹ years | Overkill | maximum security |
| 32 chars | 211 bits | 4 × 10⁴⁵ years | Overkill | encryption keys |
| 48 chars | 316 bits | ∞ | Maximum | cryptographic secrets and machine-to-machine authentication |
| 64 chars | 421 bits | ∞ | Maximum | cryptographic keys |
Crack times assume 10 billion guesses/sec (GPU cluster with MD5). Bcrypt/Argon2 hashing makes these 10,000x–100,000x slower.
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Yes. A 16-character password using uppercase, lowercase, numbers, and symbols provides 105 bits of entropy — well beyond what brute-force attacks can crack. It would take 84 trillion years to break with current GPU technology.
With a modern GPU cluster computing 10 billion hashes per second, a random 16-character password using all character types (95-char pool) would take approximately 84 trillion years to crack by brute force. Using only lowercase letters would be significantly faster to crack.
Both matter, but length has a greater impact. Each additional character multiplies the total combinations by the pool size (up to 95 for all printable ASCII). However, using all character types (uppercase, lowercase, numbers, symbols) maximizes the pool size, which also multiplies security exponentially.
Yes. You cannot reliably memorize unique random passwords for every account. A password manager securely stores all your passwords behind one strong master password, and can auto-fill them across devices and browsers.
A 16-character password is recommended for: master passwords, cloud infrastructure, and crypto wallets. Always use the strongest password practical for each account, and never reuse passwords across sites.