Is the Password Strength free to use?

Yes, the Password Strength is completely free. There is no sign-up, no account required, and no limit on how often you can use it.

Are the values from the Password Strength truly random?

The Password Strength uses your browser's cryptographically secure random number generator (Web Crypto API), the same standard used for password and security applications.

What devices does the Password Strength work on?

The Password Strength works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.

⚡ Generators

Password Strength Checker

Check password strength. Shows entropy, crack time estimate and improvement suggestions. Password never leaves your browser.

The Password Strength is a free online tool that helps you check password strength. shows entropy, crack time estimate and improvement suggestions. password never leaves your browser It runs in your browser with no sign-up, downloads, or installation needed. All processing happens locally — your data stays on your device.

Enter your password to check

🔒 Your password is never sent to any server — everything runs in your browser.

How to use

What makes a strong password?

A strong password has: 12+ characters, uppercase and lowercase letters, at least one number, at least one symbol, and avoids common words and patterns. The entropy score (in bits) measures how hard the password is to crack mathematically.

Crack time estimates

Crack time is estimated assuming an attacker trying 10 billion guesses per second (modern GPU). A 60-bit entropy password takes decades at this rate. An 80-bit+ password is effectively uncrackable with current technology.

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