Strong Password Generator

What makes a password strong?

Length beats complexity. A 16-character password mixing letters, numbers, and symbols has so many possible combinations that brute-forcing it is infeasible with today's hardware. Short "clever" passwords like P@ssw0rd feel secure but fall in seconds, because attackers try predictable letter-for-symbol substitutions first. Real strength comes from randomness and length, which is exactly what this generator provides.

Understanding entropy

The strength meter above shows entropy in bits — a measure of how unpredictable your password is. Each bit doubles the number of guesses an attacker would need. Under about 50 bits is weak; 80 bits or more is strong. A 16-character password drawn from all character types lands well above 100 bits, comfortably beyond what any realistic attack could crack. Increasing the length is the fastest way to raise entropy.

How to use your new password

1. Generate a unique password for every account — never reuse one across sites.
2. Store it in a password manager so you don't have to remember it.
3. Turn on two-factor authentication where available, so a leaked password alone can't unlock your account.

For the handful of passwords you must type from memory — your device login, your email, your password manager's master password — consider a memorable passphrase instead. Our guide on creating a strong password you can remember explains the method.

Why generate passwords in the browser?

This tool uses the Web Crypto API (crypto.getRandomValues), the same cryptographic randomness browsers use for secure connections — far more unpredictable than ordinary random functions. Crucially, the password is created entirely on your device and is never transmitted, logged, or stored. You can even disconnect from the internet after the page loads and it still works. That makes it safe to generate passwords for your most sensitive accounts.

Password do's and don'ts

• Do use at least 12 characters, and 16+ for important accounts.
• Do include a mix of character types when a site allows it.
• Don't use names, birthdays, or dictionary words.
• Don't reuse a password, even a strong one, across multiple sites.