Free2BoxFree2Box

Generateur de mots de passe

Generer des mots de passe aleatoires forts et securises

Parametres
Configurer les options de generation de mots de passe
4128
Mots de passe generes
Cliquez sur generer pour creer des mots de passe
Les mots de passe generes apparaitront ici

Comment utiliser

1

Entrez vos valeurs

Remplissez les champs de saisie avec vos nombres ou paramètres.

2

Obtenez des résultats instantanés

Les résultats se mettent à jour automatiquement pendant la saisie — aucun bouton de validation nécessaire.

3

Copiez ou enregistrez

Copiez les résultats dans le presse-papiers ou utilisez-les dans votre flux de travail.

Pourquoi utiliser cet outil

100 % Gratuit

Aucun coût caché, aucun niveau premium — chaque fonctionnalité est gratuite.

Aucune installation

Fonctionne entièrement dans votre navigateur. Aucun logiciel à télécharger ou installer.

Privé et sécurisé

Vos données ne quittent jamais votre appareil. Rien n'est envoyé sur un serveur.

Fonctionne sur mobile

Entièrement adaptatif — utilisez-le sur votre téléphone, tablette ou ordinateur.

Generating Strong Passwords: Entropy and Best Practices

Key Takeaways

  • Password strength is measured in bits of entropy — a strong password should have at least 60–80 bits of entropy.
  • Randomly generated passwords with mixed character types are exponentially harder to crack than human-chosen passwords.
  • Passwords are generated entirely in your browser using cryptographically secure randomness — they are never stored or transmitted.

Weak passwords remain the number one cause of account compromises. Human-chosen passwords tend to follow predictable patterns that attackers exploit with dictionary attacks and rule-based cracking. A cryptographically random password generator creates truly unpredictable passwords that resist all known attack methods, from brute force to sophisticated AI-powered cracking.

81% of data breaches involve weak or stolen passwords according to the Verizon Data Breach Report.

Breach Statistics

Key Concepts

1

Password Entropy

Entropy measures password randomness in bits. A password using 26 lowercase letters has log2(26) = 4.7 bits per character. Adding uppercase, digits, and symbols increases entropy to ~6.5 bits per character.

2

Cryptographic Randomness

This tool uses the browser's crypto.getRandomValues() API, which draws from the operating system's cryptographic random number generator — far superior to Math.random() for security.

3

Character Set Impact

A 12-character password using only lowercase letters (26 chars) has 56 bits of entropy. Adding uppercase, digits, and symbols (95 chars) jumps to 79 bits — making it 8 million times harder to crack.

4

Passphrase Alternative

Random word passphrases (like 'correct horse battery staple') offer high entropy with better memorability. Four random words from a 7,776-word list provide approximately 51 bits of entropy.

Pro Tips

Use a minimum of 16 characters for critical accounts — longer passwords exponentially increase the time needed for brute-force attacks.

Use a password manager to store generated passwords — you should never need to memorize random passwords.

Generate unique passwords for every account — password reuse means one breach compromises all your accounts.

Enable two-factor authentication (2FA) alongside strong passwords for defense in depth.

All passwords are generated entirely in your browser using the Web Crypto API's cryptographically secure random number generator. No passwords are stored, logged, or transmitted to any server.

Questions fréquentes