Generate secure, random 24-character passwords. 158 bits of entropy — overkill strength. Everything runs in your browser.
Use ⌘ + D to bookmark this toolA 24-character password approaches AES-256 level security — the encryption standard approved for TOP SECRET classified information. With 158 bits of entropy, even quantum computers running Grover's algorithm would still face 79 bits of effective security, well beyond any foreseeable attack. This is professional-grade security with no compromises.
Entropy is calculated as: length × log₂(pool_size). With 24 characters from the full 95-char printable ASCII set, you get 158 bits of entropy. Brute-force time at 10 billion guesses/sec: 6 × 10²⁹ years.
50 pre-generated examples. Use the generator above for a cryptographically fresh password — these are for illustration only.
Enterprise key management systems (HashiCorp Vault, AWS KMS) typically use 24-32 character secrets. Service mesh authentication tokens (Consul, Istio) default to 24+ characters. PGP/GPG passphrase best practices recommend 20-24 characters for long-term key protection.
Protecting your PGP private key used for email encryption, code signing, and identity verification. These keys may remain in use for 10+ years, so the passphrase must resist future computing advances.
Transparent Data Encryption (TDE) master keys and column-level encryption passwords. These protect entire databases of customer records, financial data, and personally identifiable information.
If you operate an internal CA, the root key passphrase must be extremely strong. A compromised CA key allows issuing trusted certificates for any domain — catastrophic for organizational security.
Passwords for systems physically isolated from networks (nuclear facilities, voting machines, military systems). These rely entirely on password strength since remote attacks aren't possible.
| 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 24-character password using uppercase, lowercase, numbers, and symbols provides 158 bits of entropy — well beyond what brute-force attacks can crack. It would take 6 × 10²⁹ years to break with current GPU technology.
With a modern GPU cluster computing 10 billion hashes per second, a random 24-character password using all character types (95-char pool) would take approximately 6 × 10²⁹ 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 24-character password is recommended for: maximum security, API secrets, and encryption keys. Always use the strongest password practical for each account, and never reuse passwords across sites.