Password Generator

Generate strong, random passwords instantly. Customize length, include symbols, numbers, and uppercase letters. Free secure password generator.

Last updated: June 1, 2026

+evlr0blg1EyW(ME

StrengthVery Strong

Length: 16

464

LowercaseUppercaseNumbersSymbols

What is Password Generator?

A password generator creates random, unpredictable passwords that are resistant to brute-force attacks, dictionary attacks, and credential stuffing. Unlike passwords humans create (which tend to follow predictable patterns — substituting 3 for E, appending 123, using pet names), generated passwords have maximum entropy per character. A 16-character random password with mixed case, numbers, and symbols has approximately 105 bits of entropy, meaning it would take a modern computer billions of years to crack by brute force. This tool lets you customize length, character types, and quantity to generate passwords that meet any security requirement.

How It Works

This tool uses the Web Crypto API (crypto.getRandomValues()) — the same cryptographically secure random number generator used by banking applications, TLS/SSL, and cryptocurrency wallets. It's not pseudo-random like Math.random(); it draws entropy from your operating system's hardware random number generator (thermal noise, interrupt timing, etc.). You configure the desired length and character set (uppercase, lowercase, numbers, symbols), and the tool generates a password by randomly selecting characters from that set. Each character position is independently random, ensuring no patterns or biases exist in the output.

Examples

16-character strong password (all character types)

Input

Length: 16, Uppercase: ✓, Lowercase: ✓, Numbers: ✓, Symbols: ✓

Output

k7#Qm9!xR2$pW4&n

20-character alphanumeric (no symbols)

Input

Length: 20, Uppercase: ✓, Lowercase: ✓, Numbers: ✓, Symbols: ✗

Output

Km8nR2xPq5tW7yB3jF9s

Tips & Best Practices

💡

Length matters more than complexity. A 16-character password with just letters is stronger than an 8-character password with all character types.

💡

Never reuse passwords across accounts. A breach on one site compromises every site sharing that password.

💡

Use a password manager to store generated passwords. You only need to memorize one master password.

Common Use Cases

•Creating unique, strong passwords for each online account to prevent credential reuse attacks
•Generating API keys, secret tokens, and authentication credentials for development environments
•Creating master passwords for password managers that are both strong and memorable (using passphrase mode)
•Generating temporary passwords for new employee accounts and password reset flows
•Creating secure Wi-Fi passwords that resist brute-force attacks from nearby attackers
•Generating encryption passphrases for file encryption, disk encryption, and encrypted backups

Frequently Asked Questions

How secure are the generated passwords?▼

Passwords are generated using the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random numbers sourced from your OS hardware entropy. This is the same level of randomness used in TLS encryption and banking applications.

Is my password stored anywhere?▼

No. Everything happens in your browser. No passwords are sent to any server or stored anywhere. The password exists only in your browser's memory until you navigate away or close the tab.

What makes a strong password?▼

A strong password is at least 12 characters long and includes a mix of uppercase, lowercase, numbers, and special characters. Length is the most important factor — each additional character doubles the time needed to crack it. A 16-character random password is effectively uncrackable.

Should I use symbols in my password?▼

Yes, including symbols significantly increases the character set from 62 (letters+numbers) to 95 possibilities per character position. This exponentially increases the total possible combinations, making brute-force attacks impractical.

How long should my password be?▼

At minimum 12 characters, ideally 16 or more. A 16-character password with full character set has about 105 bits of entropy. For high-value accounts (email, banking, password manager master), use 20+ characters.

Can I generate multiple passwords at once?▼

Yes, you can generate several passwords simultaneously to quickly set up multiple accounts or compare options. Each is independently generated with full cryptographic randomness.