Password Generator Online Free Tool
Random Password Generator
Generated Password
Password Settings
Excludes: i, l, 1, L, o, 0, O
The password generator creates strong, random passwords based on your specified criteria: length, character types (uppercase, lowercase, numbers, symbols), and any characters to exclude. Strong passwords are your first line of defense against account compromise.
What Makes a Strong Password
Password strength depends on two factors: length and character diversity. A longer password with mixed characters has exponentially more possible combinations than a short password.
| Password Length | Lowercase Only | Mixed Characters |
|---|---|---|
| 8 characters | ~200 billion combos | ~6.6 quadrillion |
| 12 characters | Extremely long | Nearly uncrackable |
| 16 characters | Extremely long | Beyond current brute force |
Password Security Best Practices
Use a unique password for every account. Use a password manager (Bitwarden, 1Password, LastPass) to generate and store them. Enable two-factor authentication wherever available. Never reuse passwords across accounts -- one breach exposes all accounts using the same password.
Character pool size (n): Lowercase only: 26 Alphanumeric: 62 (26+26+10) With symbols: 94 (all printable ASCII) Combinations = n^(password length) 94^16 ≈ 3.7 × 10^31 combinations
Frequently Asked Questions
How long should a password be?⌄
NIST (National Institute of Standards and Technology) recommends passwords of at least 8 characters, with 12-16 being ideal for most accounts. For high-value accounts (email, banking, password manager), use 20+ characters. The most important factor is uniqueness: a unique 12-character password is far safer than a reused 20-character one.
Are passphrases better than random character passwords?⌄
Passphrases (random word combinations like "correct-horse-battery-staple") can be as strong as random character passwords while being much easier to remember. A 4-word passphrase from a 2,048-word list has about 44 bits of entropy. A 8-character random password from 94 characters has about 52 bits. Both are adequate; for memorability, passphrases often win.
Should I use a password manager?⌄
Yes. The biggest password security risk is password reuse. Password managers let you have unique, complex passwords for every account without memorizing them. Store the master password (for the manager) in your memory -- make it long, memorable, and unique. The risk of a password manager being compromised is far lower than the risk of reusing passwords.
What is two-factor authentication and why does it matter?⌄
Two-factor authentication (2FA) requires both something you know (password) and something you have (phone app code, SMS, hardware key) to log in. Even if your password is stolen, an attacker cannot access your account without the second factor. Enable 2FA on your email, financial accounts, and any account with sensitive information. Authenticator apps (Google Authenticator, Authy) are more secure than SMS-based 2FA.