Password Strength Checker
Test how strong a password is.
Checked locally — never sent anywhere.
About Password Strength Checker
Test how strong a password is and get feedback on how to improve it. This checker estimates a password's resistance to guessing and brute-force attacks based on its length, variety of character types, and common weak patterns, then rates its strength and suggests what to add. It helps you understand why length and unpredictability matter far more than swapping a letter for a symbol. Crucially, the analysis runs entirely in your browser and the password you type is never sent to any server or stored, so it is safe to test real passwords. The tool is free with no signup and works on any device.
How to use this tool
- 1Type or paste a password.
- 2See its strength score and estimated crack time.
- 3Follow the tips to strengthen it.
Frequently asked questions
Is it safe to type my password here?
Yes. The check runs entirely in your browser and the password is never sent, stored, or logged.
How is strength estimated?
It scores length and character variety and estimates the entropy to approximate brute-force crack time.
Related guide
5 min readHow to Create Strong Passwords (and Actually Remember Them)
A practical guide to strong passwords: what makes them secure, common mistakes to avoid, and how to generate and remember them.