Password Strength Checker
Estimate password strength from length and character variety.
Checked locally — nothing is sent.
Start typing to see a strength estimate.
About this tool
Not every long password is strong if it is a common phrase. This free password strength checker estimates robustness as you type. Test candidates locally before you save them in a manager—helpful guidance, not a guarantee against every attack.
How to use
- Type or paste a candidate password into the checker.
- Review the strength score and feedback tips.
- Improve length or complexity if the rating is weak.
- Store the final password in a password manager.
Frequently asked questions
No. Strength estimation runs locally for this tool.