Password Generator
Create strong, secure, and random passwords instantly
Advanced Options
Entropy: -- bits
Character Pool: -- characters
How to Use This Password Generator
- Adjust the password length slider (16+ characters recommended for most accounts)
- Select character types to include (uppercase, lowercase, numbers, symbols)
- Enable advanced options if needed (exclude ambiguous characters, no repeats)
- Click 'Generate Password' to create a new random password
- Click 'Copy' to copy the password to your clipboard
Example: A 16-character password with all character types enabled generates something like 'K9#mPx$2nQw@7LfB' with 105 bits of entropy - strong enough for banking and email accounts.
Tip: For passwords you'll type manually (like your computer login), consider excluding ambiguous characters (l, 1, I, O, 0) to avoid confusion.
Why Use a Password Generator?
Strong, unique passwords are your primary defense against account breaches. This generator creates truly random passwords that resist both guessing and brute-force attacks.
- Generate unique passwords for each online account (never reuse passwords)
- Create strong master passwords for password managers (20+ characters)
- Generate secure Wi-Fi network passwords (WPA2 supports up to 63 characters)
- Create API keys and tokens for development projects
- Generate secure encryption passphrases for file protection
- Replace weak passwords flagged in security audits
Understanding Your Results
Password strength is measured in entropy bits - higher is better.
| Result | Meaning | Action |
|---|---|---|
| Below 36 bits | Very Weak - crackable in seconds | Never use for any account - add length and character types |
| 36-48 bits | Weak - crackable in hours/days | Only for throwaway accounts with no personal data |
| 48-60 bits | Good - would take months to crack | Acceptable for low-importance accounts |
| 60-120 bits | Strong - would take centuries | Recommended for email, banking, social media |
| Above 120 bits | Very Strong - effectively uncrackable | Ideal for password manager master passwords and encryption keys |
Meaning: Very Weak - crackable in seconds
Action: Never use for any account - add length and character types
Meaning: Weak - crackable in hours/days
Action: Only for throwaway accounts with no personal data
Meaning: Good - would take months to crack
Action: Acceptable for low-importance accounts
Meaning: Strong - would take centuries
Action: Recommended for email, banking, social media
Meaning: Very Strong - effectively uncrackable
Action: Ideal for password manager master passwords and encryption keys
Note: These estimates assume attackers can try billions of passwords per second. Actual security also depends on the service's security measures.
About Password Generator
Formula
Entropy = log2(pool_size^length) Pool size is the number of possible characters (94 with all types enabled). A 16-character password from 94 characters has log2(94^16) = 105 bits of entropy, meaning 2^105 possible combinations.
Current Standards: NIST SP 800-63B recommends passwords be at least 8 characters, but security experts suggest 12-16+ characters. Most importantly, each account should have a unique password stored in a password manager.
Frequently Asked Questions
Is it safe to generate passwords in a web browser?
Yes, when using a reputable tool like this one that generates passwords locally using the Web Crypto API. The password never leaves your browser - check the network tab in developer tools to verify. However, for maximum security (like password manager master passwords), consider using your password manager's built-in generator.
Should I use all character types?
Generally yes - more character types increase the pool size and entropy. However, some sites have poor password policies that reject certain symbols. If a site rejects your password, try disabling symbols or use only common ones (!@#$%^&*). Length matters more than complexity anyway.
How do I remember a random password?
Don't try to memorize random passwords - that's what password managers are for. Use a password manager to store all your unique passwords, then only memorize one strong master password. Popular options include Bitwarden, 1Password, and KeePassXC.
What length should I use for different accounts?
Use at least 12 characters for any account. For banking and email (which can reset other passwords), use 16+. For your password manager master password, use 20+ characters or a long passphrase. For WiFi passwords, 20+ characters since they're rarely typed manually.
Are passphrases better than random passwords?
Passphrases (like 'correct-horse-battery-staple') are easier to memorize but need to be longer for equivalent security. A 4-word passphrase from a 7,776-word list has about 51 bits of entropy - you'd need 5-6 random words to match a 16-character random password. For your master password, a memorable passphrase plus some random characters works well.