Password Strength Checker

Your password is never sent anywhere — all analysis happens locally in your browser. Get entropy score, time-to-crack estimate, pattern detection, and stronger alternatives generated on-device.

🔑 Password 🔒 100% Private 💻 Client-Side Only

🔒 Privacy Guarantee: This tool runs entirely in your browser. No password data is ever transmitted, stored, or logged. You can disconnect from the internet and it will still work.

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Check Your Password

Enter Password to Test

Start typing to analyse...

Strength Score

0/100

Time to Crack

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Stronger Password Suggestion

📝

Passphrase Alternative (easier to remember, harder to crack)

Passphrases are 4+ random words — much harder to crack than complex short passwords. Entropy: ~50 bits vs typical 8-char password's ~30 bits.

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Password Best Practices

Use a password manager (Bitwarden is free and open-source) to generate and store unique passwords for every account. Never reuse passwords — a breach at one site exposes all your accounts if you reuse. Enable 2FA on every account that offers it, especially email and banking.