What is a password strength checker?
A password strength checker estimates how hard a password is to guess by reviewing length, character variety, entropy, and predictable patterns.
Free Tool
Password Strength Checker
A password strength checker estimates how hard a password is to guess by analyzing length, entropy, character mix, and common risk patterns directly in your browser.
Use it to test password security, improve weak passwords, and build safer passphrases without sending anything to a server.
Local checker
Test a password
Strength scoreVery strong
100/100195 bits entropy
Character pool
69
Online attack estimate
3,833,478,626,378 years
This checker runs in your browser. It does not submit the password to Code Card, store it, or check it against live breach databases.
Safer password recipe
- Use 4 or more random words, then add numbers and symbols.
- Make every account password unique, especially email and banking.
- Store passwords in a password manager instead of reusing patterns.
- Turn on multi-factor authentication for important accounts.
Security report
What to fix
No obvious local risk flags
Suggestions
- Add uppercase letters.
Checklist
At least 12 characters
At least 16 characters
Lowercase letters
Uppercase letters
Numbers
Symbols
No obvious sequence
No repeated run
Not a common password
Try a passphrase format
river-laptop-orbit-candle-72
Long passphrases are often easier to remember and stronger than short passwords with predictable substitutions.
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Answer engine notes
Password strength basics
Length matters most
Each extra character expands the search space. A long unique passphrase usually beats a short password with substitutions.
Unique beats reused
A strong password becomes risky if reused after another site is breached. Use a password manager for unique credentials.
Password strength checker FAQ
Does this password checker store my password?
No. This tool runs in your browser and does not send, save, or log the password you type.
What makes a password strong?
Strong passwords are long, unique, hard to predict, and avoid common words, sequences, reused patterns, and leaked credentials.
Is a passphrase better than a short complex password?
A long random passphrase is often stronger and easier to remember than a short password with predictable symbol substitutions.
Can this tell me if a password was breached?
No. This local checker does not query breach databases. Use it for strength estimates, then use unique passwords and multi-factor authentication.