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Check password strength: entropy, crack time, patterns, and breach check.
Analyzed locally — never leaves your browser.
Analyze the strength of any password instantly. See entropy bits, estimated crack time for online and offline attacks, character set analysis, and pattern warnings (sequences, repetition, keyboard walks, common words). Optionally check if your password has appeared in known data breaches using the Have I Been Pwned API (k-anonymity — your full password is never sent). All analysis runs locally in your browser.
Follow these steps to analyze your password's entropy, crack time, and potential breach status using our secure local analysis tool.
Enter your password into the input field
Type or paste the password you wish to analyze into the secure text area. All analysis is performed locally in your browser to ensure your data remains private.
Review entropy and character set analysis
Check the calculated entropy bits and character set diversity to understand the mathematical complexity of your password.
Analyze estimated crack time and patterns
Examine the estimated time required for online and offline attacks. Look for warnings regarding sequences, keyboard walks, or common dictionary words.
Perform an optional data breach check
Use the Have I Been Pwned integration to see if your password has appeared in known leaks. This uses k-anonymity so your full password is never transmitted.
Adjust your password based on results
If the strength is low or patterns are detected, modify your password until the checker confirms it meets high security standards.
Estimated time: PT1M
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