Secure Password Generator

To generate a secure password: 1) Set desired length (16+ characters recommended), 2) Enable character types (uppercase, lowercase, numbers, symbols), 3) Click 'Generate', 4) Copy and store in a password manager. The tool uses cryptographically secure random generation.

Secure passwords have: 1) Length (16+ characters), 2) Complexity (mixed character types), 3) Randomness (not based on words or patterns), 4) Uniqueness (different for each account). Length is most important - a 20-character password is stronger than an 8-character complex one.

Entropy measures password strength in bits. Formula: log2(characters^length). Higher entropy = harder to crack. 60 bits minimum for important accounts, 80+ bits for sensitive data. A 16-character alphanumeric password has ~95 bits of entropy.

Minimum 12 characters, recommended 16+ characters. For high-security accounts (banking, primary email), use 20+ characters or a passphrase. Length beats complexity - 'correcthorsebatterystaple' is stronger than 'Tr0ub4dor&3'.

Passphrases (4-6 random words) offer good security with better memorability. A 4-word passphrase from a 7,776-word list has ~51 bits entropy. Random passwords are more compact but harder to remember. Use passphrases for memorable passwords, random strings for password managers.

Common passwords are in breach databases and cracking dictionaries. Attackers try these first. '123456', 'password', and 'qwerty' are cracked instantly. Even variations like 'P@ssw0rd' are well-known. Always use randomly generated passwords.

Special characters add complexity but aren't essential if length is sufficient. A 20-character alphanumeric password is stronger than a 10-character password with symbols. Include symbols if required, but prioritize length and randomness.

Change passwords only when: 1) You suspect compromise, 2) After a service breach, 3) When leaving an organization. Routine rotation often leads to weaker passwords. Use unique, strong passwords and a password manager instead of frequent changes.

A password manager securely stores all your passwords, encrypted with one master password. Benefits: unique passwords per site, strong random generation, auto-fill convenience. Popular options: 1Password, Bitwarden, KeePass. Essential for good password hygiene.

Yes, this generator uses the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random numbers. Passwords are generated entirely in your browser and never sent to any server. The source code is open for inspection.