What is Password Generator?
The Password Generator is a free online tool that creates strong, random passwords with customizable options. It allows you to generate passwords of any length with complete control over character types including uppercase letters, lowercase letters, numbers, and special symbols.
Strong passwords are essential for protecting your online accounts from hacking attempts. A secure password should be long enough, complex enough, and unique enough to resist brute-force attacks and credential stuffing.
Our password generator uses cryptographically secure random number generation to ensure that every password is truly random and unpredictable, making it virtually impossible for attackers to guess.
Why Use Password Generator?
- Ultimate Security — Generate passwords with cryptographically secure randomness
- Customizable Length — Create passwords from 4 to 128 characters
- Full Character Control — Include or exclude uppercase, lowercase, numbers, and symbols
- Instant Generation — Get a new secure password in milliseconds
- Strength Indicator — See how strong your generated password is
- Password History — Keep track of recently generated passwords
- No Storage — Passwords are generated locally and never sent to any server
- Completely Free — No registration, no limits, no ads
How to Create Strong Passwords
Recommended Password Settings
- Length: Minimum 12 characters, 16+ recommended
- Uppercase: Include A-Z
- Lowercase: Include a-z
- Numbers: Include 0-9
- Symbols: Include special characters
Password Strength Guide
| Length | Character Types | Strength | Time to Crack |
|---|---|---|---|
| 8 | Letters only | Weak | Minutes |
| 12 | All types | Good | Centuries |
| 16 | All types | Strong | Millennia |
| 24+ | All types | Very Strong | Heat death of universe |
Understanding Password Entropy
Password entropy measures the randomness of a password, typically measured in bits. Higher entropy means a stronger password:
- 40-50 bits: Easily crackable
- 50-60 bits: Below average
- 60-80 bits: Good security
- 80-100 bits: Excellent security
- 100+ bits: Maximum security
A 16-character password using all character types has approximately 95^16 (95 possible characters, 16 positions) combinations, resulting in about 104 bits of entropy.
Password Security Best Practices
Do's
- Use unique passwords for each account
- Use a password manager to store passwords securely
- Generate passwords with at least 16 characters
- Include all character types when possible
- Enable two-factor authentication (2FA) when available
- Change passwords if you suspect a breach
Don'ts
- Never reuse passwords across different accounts
- Never use personal information (birthdays, names, pet names)
- Never use common words or sequences (password, 123456, qwerty)
- Never share passwords via email or chat
- Never store passwords in plain text
- Never use the same password for multiple accounts
How to Use Password Generator
- Adjust the password length slider (16 characters is recommended)
- Select the character types you want to include
- Click "Generate Password" or wait for auto-generation
- Check the strength indicator to verify password strength
- Click the copy button or use keyboard shortcuts (Ctrl+C)
- Paste the password into your account setup or password manager
Password vs Passphrase
Traditional Passwords
Random combinations of characters, numbers, and symbols. Example: G#7$kL9@Pq2$mN4
Pros: Compact, meets most complexity requirements
Cons: Hard to remember, often less entropy than passphrases
Passphrases
Multiple random words combined. Example: correct-horse-battery-staple
Pros: Easier to remember, high entropy with enough words
Cons: Longer, may not meet character complexity requirements
Frequently Asked Questions
How does the password generator work?
Our password generator uses the Web Crypto API's crypto.getRandomValues() function, which provides cryptographically secure random numbers. These numbers are used to select characters randomly from your chosen character sets, ensuring true randomness.
Is this tool safe to use?
Yes. All password generation happens locally in your browser using JavaScript. Your passwords are never sent to any server, ensuring complete privacy and security.
What is the best password length?
We recommend at least 16 characters for most accounts. For sensitive accounts or password managers, 24+ characters provide additional security. The longer the password, the harder it is to crack.
Should I use special characters?
Yes. Special characters increase the character pool, making brute-force attacks more difficult. However, the most important factor is length. A 16-character password without symbols is often stronger than an 8-character password with all character types.
How should I store my generated passwords?
Use a reputable password manager like Bitwarden, 1Password, or LastPass. These tools encrypt your password vault with a master password, allowing you to use unique, strong passwords for every account without memorizing them.