Générateur de mots de passe
The detailed guide below is currently available in English.
What makes a password strong
Strength comes from randomness and length, not from clever patterns. Each extra character multiplies the number of possible passwords by the size of the character set, which is why a 16-character password drawn from all four sets is vastly harder to brute-force than an 8-character one. The entropy figure shown under the output measures exactly that: the logarithm of how many equally likely passwords the generator could have produced.
How the randomness works
Passwords are drawn with the browser's cryptographic random number generator. The code uses rejection sampling, which discards the tiny mathematical remainder that would otherwise make some characters slightly more likely than others — a subtlety that naive "random() % N" implementations get wrong. Nothing you generate is transmitted or stored; every password is created locally in your browser and disappears when you leave the page.
Using passwords safely
A unique password for every account matters more than any single strong password: reusing one lets a breach at one site compromise the rest. Pair this generator with a password manager, turn on two-factor authentication where it is offered, and use the "avoid ambiguous characters" option when a password must be typed from paper or read aloud over the phone.
Questions fréquentes
Are these passwords stored anywhere?
No. Generation happens entirely in your browser using its built-in cryptographic random source. The password never leaves your device, and closing or reloading the page erases it.
How long should my password be?
Sixteen characters with all character sets enabled is a comfortable default that reaches the "very strong" range. Use longer passwords — 20 characters or more — for accounts that guard email, banking, or password managers, since those accounts can reset everything else.
What does "avoid ambiguous characters" do?
It removes look-alike characters — zero versus capital O, lowercase l versus digit 1, and similar marks such as the vertical bar, backtick, and quotes. This slightly shrinks the character pool but makes passwords much easier to transcribe correctly by hand.