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How to Generate Strong Passwords
The Password Generator creates cryptographically random passwords with customizable length, character types, and exclusion rules.
- Set the desired password length (12+ characters recommended).
- Choose character types: uppercase, lowercase, numbers, symbols.
- Click Generate and copy the password. A strength indicator shows the entropy.
What Makes a Password Strong?
Password strength is measured in bits of entropy: log₂(character-set-size^length). A 16-character password using uppercase, lowercase, digits, and symbols (~95 characters) has ~105 bits of entropy — well beyond the reach of brute-force attacks. Avoid dictionary words, personal information, and reused passwords. A password manager should store your generated passwords.
Why Use Our Password Generator?
- Cryptographically random — uses crypto.getRandomValues() for true randomness.
- Strength indicator — see the entropy and estimated crack time.
- Customizable rules — include/exclude character types, avoid ambiguous characters.
- Private — passwords are generated in your browser and never transmitted.
Frequently Asked Questions
How long should my password be?
At least 12 characters, ideally 16+. Every additional character exponentially increases the number of possible combinations an attacker must try.
Is the generated password truly random?
Yes. It uses the browser's crypto.getRandomValues() API, which is a cryptographically secure pseudo-random number generator.
Should I use special characters?
Yes, if the service allows them. Special characters increase the character set size, which increases entropy. However, a longer password with fewer character types can be equally strong.
Is my password stored?
No. The password is generated in your browser and never sent to any server. Copy it immediately to your password manager.