Password Strength Checker
Check password strength with clearer feedback about patterns, crack-time estimates, and privacy. The page explains that breach checking is optional and should only use k-anonymity when enabled.
Strength
✗ At least 8 characters
✗ At least 12 characters
✗ Uppercase letter (A-Z)
✗ Lowercase letter (a-z)
✗ Number (0-9)
✗ Special character (!@#$...)
✗ Not a common password
How to Use Password Strength Checker
- Type or paste a password you want to evaluate.
- Review strength, detected weak patterns, and estimated crack time.
- Optionally run breach checking if available, then generate or choose a stronger alternative.
Features
- Pattern feedback for dates, repeats, and common words
- Online and offline crack-time context
- Show/hide password control language
- Optional breach check disclosure
- Link to generate a stronger password
Password Strength Checker: practical uses
This password strength checker supports password checker, password strength test, strong password, and breached password check intent with clear privacy language.
Why it helps
- Best for: Understanding why a password is weak and what to improve.
- Privacy: The page keeps the privacy message close to the working area.
- Next step: Use Password Generator to create a stronger passphrase or random password.
Frequently Asked Questions
What makes a password strong?
A strong password has at least 12 characters, includes uppercase and lowercase letters, numbers, and special characters, and is not a commonly used word or phrase. This tool checks all these criteria simultaneously.
Is my password stored anywhere?
No. This tool runs entirely in your browser using JavaScript. Your password is never sent to any server and never stored anywhere. You can even disconnect from the internet before typing your password.
What counts as a special character?
Any character that is not a letter (a-z, A-Z) or digit (0-9) is considered special. Examples include: ! @ # $ % ^ & * ( ) _ - + = [ ] { } | \ : ; " ' < > , . ? /
What does "common password" mean?
The tool checks your password against a list of the most frequently used passwords (like "password", "123456", "qwerty"). Using a common password is extremely risky because attackers always try these first.
