Password & passphrase generator
Generate a strong random password, or a passphrase of random words that's easier to type and remember. Shows the estimated strength in bits.
🔒 Your files never leave your device
How it works
Randomness comes from crypto.getRandomValues, your browser's cryptographically secure generator, with rejection sampling so every character or word is exactly equally likely. Passwords always include at least one character from each set you select.
Passphrases use the EFF large wordlist (7,776 words, about 12.9 bits per word). Six words is about 77 bits, which is plenty for most accounts; use more for a password manager master password.
The strength shown is the entropy of the generation method, which is a true measure for randomly generated secrets. Nothing is saved; refreshing the page forgets everything.
Privacy: the tool runs in your browser, so nothing you add (files, text, passwords) is uploaded or stored by us. No account needed. It also works offline once loaded.