Create cryptographically strong, complex passwords that resist modern cracking hardware. Every character class included — uppercase, lowercase, numbers, and symbols — all generated in your browser with zero server transmission.
A complex password uses all four character types — uppercase letters, lowercase letters, digits, and symbols — arranged unpredictably. This maximises entropy, making brute-force and dictionary attacks computationally infeasible.
| Character Set | Entropy per Character |
|---|---|
| Numbers only (10) | 3.3 bits |
| Lowercase only (26) | 4.7 bits |
| Uppercase + lowercase (52) | 5.7 bits |
| All types + symbols (94+) | 6.6+ bits |
A 20-character complex password from all 94 character types has approximately 132 bits of entropy — billions of years to crack with current hardware.
crypto.getRandomValues(). Nothing leaves your device.| Metric | Standard (8 chars, simple) | Complex (20 chars, all types) |
|---|---|---|
| Possible combinations | ~2.8 × 10¹⁴ | ~2.9 × 10³⁸ |
| Time to crack (GPU cluster) | Minutes to hours | Billions of years |
| Resistant to dictionary attack | No | Yes |
| Resistant to brute-force | No | Yes |
Major security frameworks all recommend complex, machine-generated passwords over human-created ones. NIST Special Publication 800-63B (2025 update) "SHALL" requires CSPRNG generation for verifier-created passwords. NCSC guidance recommends using password managers and machine-generated passwords. OWASP's ASVS requires at least 12 characters with complexity for high-value accounts.
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