Weak passwords are the #1 cause of account breaches. This guide explains how to generate cryptographically secure passwords online and what makes a password truly strong.
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Generate Password Free →What Makes a Password Strong?
A strong password has four qualities: length (at least 12 characters), complexity (uppercase, lowercase, numbers, symbols), randomness (not based on dictionary words or personal info), and uniqueness (different for every account).
Password Entropy Explained
Entropy measures how unpredictable a password is, expressed in bits. A 12-character password using all character types has around 79 bits of entropy — practically uncrackable with current hardware. Each additional character exponentially increases security.
| Length | Character Set | Entropy (bits) | Crack Time |
|---|---|---|---|
| 8 | Lowercase only | 37.6 | Minutes |
| 8 | Mixed + symbols | 52.4 | Hours–days |
| 12 | Mixed + symbols | 78.7 | Centuries |
| 16 | Mixed + symbols | 104.9 | Heat death of universe |
How to Use a Password Manager
You can't memorize 50 unique, random passwords — and you shouldn't try. Use a password manager (Bitwarden, 1Password, or the built-in one in your browser) to store passwords. Generate a unique strong password for each site, store it in the manager, and only memorize one strong master password.
Frequently Asked Questions
crypto.getRandomValues() — the same cryptographically secure random number generator used by browsers for encryption. Your password is generated entirely in your browser and never sent to any server.