🧱 Password Strength Checker
Type a password to see strength, entropy, and realistic attack estimates — all locally in your browser.
In-browser · Private · No uploads
Strength —
Length
0
Entropy (approx)
0 bits
Crack time (offline)
—
Basic hygiene
Suggestions
- Start typing to see advice…
Help & FAQ — Password Strength Checker
How to use
- Type or paste a password into the checker.
- Review strength feedback, entropy estimates, and breach count lookups.
- Adjust length and character mix until the score meets your requirement.
Use cases
- Check password strength before reuse.
- Spot weak patterns in existing passwords.
Tips & FAQs
- Is my password sent anywhere?
- No—hash matching happens locally against an embedded prefix dataset.
- Why does it flag common words?
- The entropy model penalizes dictionary words and known patterns to encourage stronger choices.
Formats & limits
- Offline breach data covers the top exposed passwords list
- Results are advisory—services may enforce different policies
- Input field clears when you navigate away
Privacy
Analysis stays in your browser; nothing is uploaded.
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Updated
15 October 2025