Password Mode
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Generated Password
Security Guarantee
All passwords are generated using the cryptographically secure Web Crypto API directly in your browser. Your passwords are never sent to any server or stored anywhere. Once you leave this page, the only record of your passwords exists where you copied them.
About Password Generator
Generate strong, secure passwords instantly with our free online password generator. Customize password length (4-128 characters), include or exclude uppercase, lowercase, numbers, and symbols. Advanced features include password strength meter with entropy calculation, multiple password generation, pronounceable password mode for easier memorization, word-based passphrase generation, exclude ambiguous characters, and custom character sets. All password generation happens locally in your browser using the cryptographically secure Web Crypto API - your passwords are never sent to any server.
Password Generation Modes
Random
Fully random characters from your selected character set. Maximum security but harder to remember.
Pronounceable
Alternating consonants and vowels create speakable passwords. Easier to remember while still being secure.
Passphrase
Random words joined together (like "correct-horse-battery"). Very secure due to length, easy to remember.
Understanding Password Strength
Password strength is measured in "bits of entropy" - a measure of unpredictability. The formula is: log₂(charset_size^length)
Password Best Practices
- Use unique passwords - Never reuse passwords across different accounts
- Length matters - Longer passwords are exponentially harder to crack (aim for 12+ characters)
- Mix character types - Include uppercase, lowercase, numbers, and symbols
- Use a password manager - Store your complex passwords securely
- Enable 2FA - Add two-factor authentication for important accounts
- Avoid personal info - Don't use birthdays, names, or common words
Frequently Asked Questions
How secure are the generated passwords?
Very secure! We use the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure random numbers. This is the same level of security used by password managers and security applications.
Are my generated passwords stored or sent anywhere?
No! All password generation happens entirely in your browser. Your passwords are never sent to any server or stored anywhere. Once you leave the page, the only record of your passwords exists where you copied them.
What is password entropy?
Entropy measures password unpredictability in bits. Higher entropy means harder to crack. 40 bits takes hours to crack, 60 bits takes years, 80+ bits is practically uncrackable with current technology.
What are pronounceable passwords?
Pronounceable passwords alternate consonants and vowels to create passwords that sound like words (e.g., "kobami"). They are easier to remember but slightly less secure than fully random passwords of the same length.
What is a passphrase and why use one?
A passphrase is a password made of random words (e.g., "correct-horse-battery-staple"). They are longer but easier to remember than random character strings, and can be very secure due to their length.
Why exclude ambiguous characters?
Ambiguous characters like 0/O (zero/letter O) and l/1/I (lowercase L/one/uppercase i) look similar in many fonts. Excluding them prevents confusion when reading or typing passwords manually.