Generate Strong Passwords Instantly
Create secure, random passwords with custom length and character types. Runs entirely in your browser — passwords are never sent anywhere.
How to Generate a Secure Password
Set Length
Drag the slider or click a preset. 16+ characters is recommended for most accounts. Use 32+ for high-value accounts.
Choose Types
Enable uppercase, lowercase, numbers, and symbols for maximum strength. Disable any type if a site restricts it.
Copy & Use
Click Generate, then Copy. Paste it into your password manager or directly into the site. Never reuse passwords.
Frequently Asked Questions
Are passwords generated on the server?
No. PassGen uses the browser's built-in crypto.getRandomValues() API — a cryptographically secure random number generator. Passwords are generated entirely on your device and never sent to any server.
How long should my password be?
For most accounts, 16 characters with all character types gives over 100 bits of entropy — effectively uncrackable with current technology. For critical accounts (email, bank, password manager), use 24–32 characters.
What does "exclude ambiguous characters" do?
It removes characters that look similar to each other: 0 and O, l, 1, and I. Useful when you need to read and type the password manually instead of copy-pasting.
What is password entropy?
Entropy measures how unpredictable a password is, expressed in bits. Each bit doubles the number of possible combinations an attacker must try. A 60-bit password has over a quintillion possible values; at a billion guesses per second, it would take thousands of years to crack.
Should I use a password manager?
Yes — always. A password manager lets you use a unique, strong password for every site without memorizing them. Generate passwords here, then store them in a manager like Bitwarden, 1Password, or KeePass.