Vérificateur de Force de Mot de Passe

Outil gratuit en ligne test your password strength instantly with real-time analysis. get entropy scores, crack time estimates, and actionable security tips. free online, private, no sign-up.

Qu'est-ce que Vérificateur de Force de Mot de Passe ?

A powerful developer tool designed to help you work more efficiently. Password Strength Checker provides accurate results instantly with a clean, intuitive interface. Perfect for developers, engineers, and IT professionals.

Formule

entropie (bits) = Length × log₂(Pool Size)

Pool Size = 26 (lower) + 26 (upper) + 10 (digits) + 33 (special) = 95 max

Score based on: length (50%), case mixing (15%), digits (15%), special chars (20%)

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Exemple

The mot de passe "Tr0ub4dor&3" scores ~56 bits of entropie (Good). It would take days to months to crack. A better approach: "blue-elephant-dances-midnight" has ~98 bits (Very Strong).

Avantages Clés

Get accurate results instantly in your browser.
Save time with real-time calculations as you type.
No data leaves your device - complete privacy.
Free to use on any device, no sign-up required.

Erreurs Courantes à Éviter

avec dictionary words or courant phrases
Remplacement letters with similar characters (e.g., 0 for O)
avec personally identifiable information
Créer des mots de passe trop courts ou trop simples

Conseils de Pro

utilisation passphrases — long sentences that are easy to remember
Never reutilisation mot de passes across different accounts
Activez 2FA on all accounts that support it
utilisation a mot de passe manager to générer and store unique mot de passes

Termes Clés Expliqués

entropie: Measure of unpredictability in bits
Attaque par force brute: essayer chaque combinaison
Dictionary attack: Trying courant words/phrases
Passphrase: un mot de passe composé de plusieurs mots

Cas d'utilisation courants

Testing new mot de passes before utilisation
Evaluating existing mot de passe force
Learning mot de passe security best practices
Audit des politiques de mots de passe organisationnelles

Questions fréquentes

How is mot de passe force calculated?

force is calculated avec entropie (bits of aléatoireness), length, character diversity, and motif analysis. Higher entropie and diverse characters result in stronger mot de passes.

What is a good entropie score?

entropie above 60 bits is good, above 80 bits is strong, and above 100 bits is very strong. A 12-character mixed-type mot de passe typically scores 70+ bits.

Pourquoi la longueur est-elle plus importante que la complexité ?

Length exponentially increases mot de passe force. A 20-character lowercase-only mot de passe (95 bits) is stronger than a 10-character mixed-type mot de passe (66 bits). Length always wins.

Is this outil storing my mot de passe?

No. All analysis happens in votre browser. For security, consider typing a similar mot de passe rather than votre actual one.

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