Password and random value generator
Strong passwords, pronounceable passphrases, UUIDs and random keys, from your browser’s cryptographic random number generator. Nothing is sent or stored.
Password
Passphrase
UUID
Random key
完全在你的浏览器中运行 — 不会发送到任何地方
What entropy means
Entropy counts the guesses an attacker would need: each bit doubles them. Around 70 bits is strong for an online account; 100 or more is plenty for a key or a master password. The figure holds only for randomly generated values — a password you chose yourself is weaker than its length suggests.
How long should a password be?
For a password manager to remember, 16–20 random characters. For one you type, a passphrase of five or more words is easier and just as strong.
Where do the passphrase words come from?
They are made of random syllables rather than taken from a word list, so every word is equally likely and the strength shown is exact.
When should I use UUID v7 instead of v4?
Version 7 starts with the time, so values sort in creation order — better for database keys. Version 4 is fully random.