Passphrase Strength Checker

Analyze passphrases locally, review breach exposure, and see how length and word choice change the score. Nothing leaves your browser.

Privacy-First Passphrase analyzer

Enter your passphrase to analyze its strength

Your password never leaves your browser — all analysis happens locally

Entropy

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Offline crack time

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Character coverage

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Enter a passphrase above to see entropy, crack times, breach status, and tailored guidance—all computed locally in your browser.

Frequently Asked Questions