Generate Strong, Secure Passwords — Instantly
Create cryptographically random passwords with full control over length and character sets. All generation happens in your browser. Nothing is sent to any server.
Character Types
Advanced Options
What Is a Password Generator?
A password generator is a tool that creates random, unpredictable strings of characters that can be used as passwords. Unlike passwords humans create — which often contain dictionary words, dates, or predictable patterns — generated passwords are truly random, making them exponentially harder to crack through brute force or dictionary attacks.
Our password generator uses the crypto.getRandomValues() API built into every modern browser. This is the same cryptographically secure random number generator that underpins HTTPS, ensuring that every password it produces is as unpredictable as possible.
Why Use a Password Generator?
Weak passwords are the single most common cause of account compromise. According to industry research, over 80% of hacking-related breaches involve stolen or weak credentials. Here is why a password generator should be part of your security workflow:
- Eliminates predictability: Humans are terrible at randomness. We reuse patterns, add predictable suffixes like "123", and lean on dictionary words. A generator removes human bias entirely.
- Scales to any length: Need a 32-character Wi-Fi passphrase? A 64-character API key? A generator produces any length instantly — no typing required.
- Enforces character diversity: Our tool can guarantee that every password contains uppercase, lowercase, numbers, and symbols, satisfying even the strictest password policies.
- Prevents reuse: Because each password is generated on demand, you naturally create unique passwords for every account — a critical habit for compartmentalizing risk.
- Works offline: All generation happens in your browser. No network calls, no server logging, no database of generated passwords.
How Strong Is Your Password?
Password strength is measured by entropy — the amount of uncertainty an attacker faces when trying to guess it. The formula is simple:
Entropy = log₂(possible characters ^ length)
A 12-character password using only lowercase letters has about 56 bits of entropy. The same length using uppercase, lowercase, numbers, and symbols jumps to 78 bits. At 16 characters with full character diversity, you reach 105 bits — effectively uncrackable by any brute-force method.
Our strength meter evaluates length, character diversity, and pattern complexity to give you an instant assessment: Weak, Fair, Good, Strong, or Very Strong.
Password Length Recommendations
| Use Case | Recommended Length | Character Types |
|---|---|---|
| Online accounts (email, social media) | 16 characters | All types |
| Banking and financial | 20–24 characters | All types |
| Wi-Fi router passphrase | 20–32 characters | All types |
| API keys and tokens | 32–64 characters | All types |
| Master password (with memorization) | 12–16 characters | Passphrase style |
How to Use This Password Generator
- Choose a length: Drag the slider or click a preset (12, 16, 24, 32, 64). We recommend 16 as the default minimum.
- Select character types: Toggle uppercase, lowercase, numbers, and symbols. Most systems require at least three of the four.
- Enable advanced options (optional): Exclude visually similar characters if you need to type the password manually. Enable "require all types" to guarantee diversity.
- Click Generate: The password appears in the display area with a scramble animation.
- Copy and save: Click Copy to save the password to your clipboard. Paste it into your password manager or account creation form.
Frequently Asked Questions
Is this password generator free?
Yes, completely free. No signup, no usage limits, no premium tier. Use it as often as you need.
Does this tool send my passwords to a server?
No. All password generation happens 100% client-side in your browser using the Web Crypto API. Your passwords never leave your device. This makes it safe for generating credentials for any system, including proprietary and high-security environments.
How random are the generated passwords?
We use crypto.getRandomValues(), a cryptographically secure pseudorandom number generator provided by your browser. It is the same RNG that powers TLS/HTTPS encryption. This is vastly superior to Math.random(), which is not cryptographically secure.
What is the maximum password length?
You can generate passwords up to 128 characters long. This is more than enough for any practical use case, including long API keys and encryption passphrases.
Should I exclude similar characters?
If you need to manually type the password (for example, on a device without copy-paste), enabling "Exclude similar characters" removes visually ambiguous glyphs like l, I, 1, O, and 0. If you are copying and pasting, this option is unnecessary.
How do I remember these random passwords?
You should not try to memorize them. Use a password manager like Bitwarden, 1Password, or KeePassXC to store your generated passwords securely. Your only memorized password should be your master password for the manager itself.