Password Generator
This password generator creates strong, unpredictable passwords using your browser’s cryptographically secure random number generator — the same class of randomness used for encryption keys. Set the length and choose which character classes to include (uppercase, lowercase, digits, symbols), and see the estimated entropy in bits update live. Everything runs client-side, so no password you generate is ever transmitted or stored anywhere.
Frequently asked questions
How does this password generator create randomness?
It draws its randomness from your browser’s built-in cryptographically secure random number generator, the same source used for encryption keys, rather than a predictable pseudo-random function.
How long should my password be?
For most accounts, 16 or more characters combined with mixed character classes pushes entropy well past 100 bits, which is far beyond what offline brute-force attacks can feasibly search.
Does adding symbols make a password much stronger than adding length?
Length matters more than character variety — each extra character multiplies the search space by the size of your chosen character set, so a 20-character lowercase-only password can out-entropy a 10-character password that mixes all four classes.
Is it safe to generate a password for a real account using this tool?
Yes — password generation happens entirely in your browser and nothing you generate is sent over the network or stored, so it is as private as writing one down yourself, but faster and less error-prone.
Is a long passphrase better than a random character password?
Both can reach similar entropy, but a random character password reaches high entropy in fewer characters — a 12-character fully random password can exceed the entropy of a four-word passphrase, though passphrases are easier to type and remember.