Secure Password Generator

Cryptographically secure passwords generated locally on your device.

...

StrengthStrong · 104 bits

Parameters

Password Length16

83264

Bulk Count1

11020

Uppercase Letters

A-Z

Lowercase Letters

a-z

Numbers

0-9

Symbols

!@#$%^&*

Exclude Ambiguous

No 0,O,l,1,I

Building a Strong Password

A truly secure password should be completely random, highly complex, and unique for every account. Our Secure Password Generator allows you to enforce uppercase letters, lowercase letters, numbers, and symbols up to 64 characters in length to defeat brute-force attacks. Use bulk mode to generate up to 20 passwords at once for batch provisioning.

Is it safe to generate passwords online?

Standard online generators are risky. ZeroServer is different. We use window.crypto.getRandomValues() to tap into your operating system's hardware-level entropy. The password is generated in your computer's memory and is destroyed the moment you close the tab. It is completely invisible to our servers.

Frequently Asked Questions

How long should a strong password be?

At least 16 characters for general use; 20+ for critical accounts. Each extra character multiplies the brute-force search space exponentially. With a password manager, use 32+ characters — you don't need to memorize them.

Should I include special characters?

Yes, if the site allows them. Mixing uppercase, lowercase, digits, and symbols dramatically increases the search space an attacker must explore — especially for shorter passwords under 12 characters.

What's a passphrase and when should I use one?

A passphrase is several random words joined together (e.g. correct-horse-battery-staple). It's easier to memorize than a random string while being statistically harder to brute-force at 4+ words. Best for passwords you must type from memory.

Is the generated password truly random?

Yes. This tool uses your browser's crypto.getRandomValues() API — the same cryptographically secure entropy source used for TLS key generation. The password is generated in your browser and never transmitted anywhere.

What does 'exclude ambiguous characters' do?

It removes visually similar characters like O (capital O) and 0 (zero), I (capital I) and l (lowercase L) and 1. Use this when you need to read the password off a screen and type it into another device.

Private & free — this tool runs entirely in your browser.