Generated locally with crypto.getRandomValues. Nothing is stored or sent.
Generate strong passwords and memorable passphrases
Updated · Free · No sign-up · Runs in your browser
Passphrase Smith creates Diceware-style passphrases and random passwords using your browser's cryptographic random number generator (Web Crypto). An entropy meter shows how strong each result is, and options let you skip look-alike characters. Passwords are generated on your device and never sent anywhere.
How to use Passphrase Smith
Choose passphrase or password mode.
Set the length, word count, separators and character options.
Check the entropy estimate and copy the result into your password manager.
Frequently asked questions
How does Passphrase Smith generate random words and characters?
Passphrase Smith uses window.crypto.getRandomValues() combined with rejection sampling to ensure mathematically uniform selection with zero modulo bias.
Are generated passphrases stored or transmitted anywhere?
Never. Generation happens strictly in-memory inside your browser tab, and session history clears when you close or reload the page.