Password Strength Checker
Type a password to see strength score, estimated entropy bits, and practical tips. Everything runs locally; we do not send or store what you type.
Runs entirely in your browser. Your data never leaves this device.
- Strength score
- Entropy estimate
- Charset analysis
- Actionable tips
- No logging
How it works
- Type or paste a password.
- Review score, entropy estimate, and tips.
- Improve the password or generate a stronger one.
Key features
- Strength score
- Entropy estimate
- Charset analysis
- Actionable tips
- No logging
FAQ
Do you store passwords?
No — checks run only in your browser and are not uploaded.
Is entropy exact?
It is an estimate from length and character classes, not a breach-database check.
Online leaks?
This tool does not query Have I Been Pwned or similar services.
Related?
Use Password or Passphrase Generator for stronger secrets.
Keep building
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