100% private: this check runs only inside your browser. Still, never type your real current passwords into any website ā test similar patterns instead.
Type a password into the text field to test its strength.
Watch the strength bar update in real time as you type.
Read the strength verdict: Very Weak, Weak, Fair, Strong, or Very Strong.
Review the detailed analysis including length, character types, and estimated crack time.
All calculations and data stay in your browser. Nothing is uploaded or stored.
Get instant, precise results with no waiting. Just input and calculate.
No registration, no fees, no daily limits. Use any tool as often as you need.
Fully responsive. Works on desktop, tablet, iPhone, and Android.
The tool calculates entropy based on password length and character pool size, then estimates the time required for a computer to brute-force it at 10 billion guesses per second.
Yes. The tool has a built-in list of the most common passwords (like password, 123456) and flags them immediately as very weak.
Never. All analysis happens entirely in your browser. No data is ever transmitted over the network.