Password Entropy Calculator
Estimate entropy bits, character-pool size and offline crack time without sending your password anywhere.
Hit Calculate to see strength
Calculate to estimate crack time
Metrics appear after calculation
Your explanation appears here
Password reuse, phishing, malware and leaked hashes can bypass mathematical strength.
Your plan appears after calculation
Test a longer password or different character pool without changing the main input.
Calculate your baseline first
It estimates entropy bits from password length and character pool size, then applies simple penalties for obvious repeats, sequences, common words and reuse risk. The calculation runs entirely in your browser.
No. This tool uses client-side JavaScript only. It does not call external APIs, store passwords, use analytics or send the entered text anywhere.
For important accounts, aim for at least 60–80 effective bits, unique passwords and MFA. Long random passphrases or password-manager generated strings are usually safer than short complex passwords.
Results are estimates generated locally in your browser. Real-world safety depends on password uniqueness, storage practices, breach exposure, phishing resistance, malware, MFA and service-side rate limits. Do not paste highly sensitive production secrets on shared devices. VisionVix accepts no liability for security decisions based on this output.
