Free Password Generator
Create strong, secure passwords instantly
đź”’ 100% Secure & Private: All passwords are generated locally in your browser using cryptographically secure random number generation. Nothing is stored or transmitted to any server.
What Makes a Password Strong?
A strong password is your first line of defense against unauthorized access to your accounts. Understanding what makes a password secure is essential in today's digital landscape.
- Length over complexity: A longer password is exponentially harder to crack than a shorter one with special characters. Aim for at least 12 characters, but 16+ is better.
- Entropy matters: Entropy measures unpredictability. Higher entropy means more possible combinations and a stronger password. Our generator shows entropy in bits to help you gauge strength.
- Uniqueness for each account: Never reuse passwords across different services. If one site is breached, all your accounts with that password are at risk.
- Avoid personal information: Birthdays, names, addresses, and other personal details are easily guessable or discoverable through social engineering.
- Dictionary words are weak: Attackers use dictionary attacks that try common words and phrases. Random character combinations or memorable passphrases with multiple words are much stronger.
Password Security Best Practices
Following these best practices will help keep your accounts secure:
- Use a unique password for every account: This is the most important rule. If one service is compromised, your other accounts remain safe.
- Use a password manager: Managing dozens of unique, strong passwords is impossible without help. Password managers like Bitwarden, 1Password, or LastPass securely store all your passwords behind one master password.
- Enable two-factor authentication (2FA): Add an extra layer of security with 2FA. Even if someone gets your password, they can't access your account without the second factor.
- Change passwords if a breach occurs: If you receive notification of a data breach, change your password immediately. Check haveibeenpwned.com to see if your accounts have been compromised.
- Never share passwords: Your password is like your house key—sharing it defeats its purpose. If you must share access, use proper account sharing features or password manager sharing.
- Avoid writing passwords down: Unless stored in a secure physical location like a safe, written passwords are vulnerable to theft. Use a password manager instead.
How to Use This Generator
Our password generator makes creating secure passwords simple:
- Choose your generation mode: Select "Random" for maximum security, "Memorable" for easier-to-type passphrases, or "PIN" for numeric codes.
- Adjust length and complexity: Use the slider to set your desired password length. For random passwords, select which character types to include.
- Click "Generate Password": The generator creates a cryptographically secure password instantly using your browser's built-in security features.
- Copy and save securely: Use the Copy button to copy your password, then save it in your password manager immediately.
- Use immediately and never reuse: Apply the password to the account you're creating or updating, and never use it for any other account.
Understanding Password Entropy
Entropy is a measure of password unpredictability. Higher entropy means more possible combinations, making the password harder to crack through brute force attacks.
Entropy is calculated based on the character set size and password length. The formula is: entropy = logâ‚‚(possible_characters^length). Here's how different passwords compare:
| Password Type | Example | Entropy |
|---|---|---|
| 8-char lowercase only | password | ~37 bits |
| 12-char mixed case + numbers | aB3dE5gH9jK2 | ~71 bits |
| 16-char all types | aB3!dE5@gH9#jK2$ | ~105 bits |
| 4-word passphrase | correct-horse-battery-staple | ~52 bits |
Generally, 60+ bits of entropy is considered strong for most purposes, while 80+ bits provides excellent security even against well-resourced attackers.
Frequently Asked Questions
Is this password generator secure?
Yes! All passwords are generated using your browser's cryptographically secure random number generator (window.crypto). Passwords are never sent to our servers or stored anywhere.
Are generated passwords truly random?
Yes. We use crypto.getRandomValues(), which provides cryptographically strong randomness suitable for security-critical applications.
Should I use symbols in my passwords?
Symbols increase password strength, but length is more important. A 16-character password without symbols is stronger than a 10-character password with symbols.
What's better: random passwords or passphrases?
Both are secure if long enough. Passphrases (like "Correct-Horse-Battery-Staple") are easier to remember and type, while random passwords offer maximum security for password managers.
How often should I change my passwords?
Only change passwords if there's a known breach or suspicious activity. Frequent changes without reason can lead to weaker, predictable passwords.
Can I use generated passwords for banking?
Absolutely! Generated passwords are suitable for all accounts, including banking, email, and social media.
What is a password manager?
A password manager securely stores all your passwords in an encrypted vault, so you only need to remember one master password. Popular options include Bitwarden, 1Password, and LastPass.
Why shouldn't I reuse passwords?
If one account is breached, attackers will try that password on all your other accounts (credential stuffing). Unique passwords contain the damage to one account.