Security & Privacy
🔒 Your data stays on your device
Password & Passphrase Generator
Generate cryptographically secure passwords and passphrases with NIST entropy score calculation and custom charsets.
Strength: Very Strong (104 bits)
Crack Time Estimate: Billions of years
Cryptographically Strong Passwords & Passphrases
Protect your accounts with uncrackable, high-entropy credentials. Choose between character-randomized passwords or memorable multi-word passphrases with real-time cryptographic strength assessment.
Key Capabilities
- ✓ Cryptographically secure randomness generated via standard window.crypto.getRandomValues
- ✓ NIST Special Publication 800-63B Shannon entropy score and crack-time estimator
- ✓ Dual modes: Random Character Passwords and Memorable Multi-Word Passphrases
- ✓ Custom character pool toggles: uppercase, lowercase, numbers, symbols, ambiguous character exclusion
- ✓ Strict zero-transmission policy: passwords are generated purely in client memory and never saved
Frequently Asked Questions
Is this password generator safe to use for sensitive accounts?
Yes. All randomness is sourced directly from your operating system's cryptographic entropy source through the browser's native window.crypto API. No password data is sent over the internet or logged.
What entropy score is considered safe?
An entropy score above 60 bits is robust against modern offline brute-force attacks; scores above 80 bits provide enterprise-grade protection.