Password Generator
Generate strong random passwords or passphrases in your browser, with a real strength estimate rather than a coloured bar.
…Very weak0 bits
Entropy, not a guess: how many bits an attacker would have to search. Above 75 is comfortable, above 100 generous.
Runs entirely in your browser — nothing you paste is uploaded or stored.
About password generator
A strong password is simply one that is hard to guess, and the honest measure of that is entropy — how many equally likely possibilities an attacker would have to work through. Length buys far more of it than exotic characters do.
Everything is generated with your browser's cryptographic random source and never leaves the page. A password generator that sent its output to a server would be worse than useless.
Good to know
- The strength shown is calculated entropy in bits, not a vague label. Above roughly 75 bits is comfortable for an account you care about; above 100 is generous.
- Passphrases of random words are easier to type and remember than a scramble of symbols. The word list here holds 289 words, so each one contributes about 8.2 bits — meaning you need eight of them to match roughly what a five-word Diceware phrase gives you. The meter shows the real figure as you change the count, so you can see the trade rather than trust a label.
- Ambiguous characters (l, I, 1, O, 0) can be excluded, which helps when a password has to be read aloud or typed from a screenshot.
- The best password is one you never type: use a password manager, and use this to fill it.