Password Generator
Create strong random passwords and passphrases on your device.
About the Password Generator
Choose a password or a passphrase, its length and whether to include symbols. The generator shows the result and its strength in bits of entropy; nothing is stored or sent.
Passwords here are generated in your browser with crypto.getRandomValues, the operating system's cryptographically secure random source; nothing is sent or stored. A 20-character password from about 70 symbols has roughly 120 bits of entropy. Passphrases of random words are easier to type and remember.
The formula
Entropy = length × log₂(characters available)
Worked example
20 characters with symbols
- About 70 possible characters per position
- 20 × log₂ 70 ≈ 123 bits of entropy
Questions people ask
Is this safe to use?
Yes; generation happens locally. For best security, save it straight into a password manager.
How long should it be?
16+ characters, or 5+ random words for a passphrase.
Should every account have its own password?
Yes: reused passwords let one breach unlock other accounts. A password manager makes this easy.