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  1. Encrypti0n.com
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  3. Password Intelligence

Password Intelligence

Unlock stronger security with our free online password strength checker. The Password Intelligence tool delivers instant, client-side analysis powered by open-source zxcvbn pattern detection and optimized for the Argon2id hashing algorithm which is used in our AES-GCM-256 Data Encryption App for key derivation. View crack-time estimates, tips, and best-practice guidance all without ever sending your password to a server.

Password Input

Note: Your password is NOT sent anywhere. Analysis is done locally in your browser.

Tips & Feedback

Weaknesses Detected:

    Suggestions:

      Analysis Results

      Score: Password Strength Unknown
      Cracking Time Estimates:
      Fast Hash (SHA-1,…)
      —
      Argon2id: Large Scale Cluster Attack (100k High-End GPUs)
      —
      Argon2id: Single Attacker (3 High-End GPUs)
      —

      How Password Strength Estimation Works

      • 1. Pattern Matching (zxcvbn)

        We scan for common words, names, sequences ( qwerty , 12345 ), repeats, and substitutions ( @→a , 3→e ).

      • 2. Entropy Calculation

        Each pattern's unpredictability is measured to calculate overall guess entropy.

      • 3. Crack Time Estimates

        Guess counts translate into time estimates for fast hashes and Argon2id scenarios with a datacenter level attack or a single strong attacker.

      • 4. Score Assignment (0-4)

        0 = unusably weak | 4 = strong

      “A passphrase like correct horse battery staple (~550 years at 1k guesses/sec) far outlasts Tr0ub4dor&3 (~3 days).”

      Why Key Derivation & Salting Matter

      When you use this site's encryption function, it generates a 256-bit key using the Argon2id (memory-hard, salted) algorithm: Roughly 20 million times slower to brute-force than fast hashes.

      Tips for Creating a Strong Password

      Use a Passphrase

      Combine random words ( correct-horse-battery-staple ) for length and memorability.

      Avoid Predictable Patterns

      No common substitutions ( @→a ) or sequences like 1234 .

      No Personal Info

      Skip names, birthdays, pet names—top hacker guesses.

      Unique per Account

      Use a password manager so one breach can't cascade.

      Make It Long

      Aim for 12+ characters; length beats complexity.

      Enable 2FA

      Authenticator apps or biometrics give a vital extra layer.

      Try our customizable password generator here for truly random passwords or our master password generator for complex, easy-to-rember passwords here. The File and Text Encryption App on this site also uses this password generator and comes with a built-in password manager that can also managed via a master password.

      Privacy & FAQ

      All analysis runs client-side, your password never leaves your browser.

      No. everything runs locally via zxcvbn. Nothing is logged or transmitted.

      Score 0-1 = very weak; 2 = fair; 3 = good; 4 = excellent (offline attacks).

      We compare a fast, unsalted hash (billions/sec) to Argon2id (10k/sec on a strong GPU) to show the impact of salting and hashing.

      These are back-of-the-envelope calculations; real attacker speeds can vary.