Password Generator – Strong & Secure Passwords
Generate strong passwords and passphrases instantly. Client-side, no data stored.
Advanced Options
Keyboard: Cmd/Ctrl+Enter to generate, Cmd/Ctrl+R to regenerate
Generated locally. We don't store or transmit your passwords.
Strong passwords are your first line of defense against unauthorized access to your accounts. Our password generator creates cryptographically secure passwords using your browser's built-in random number generator, ensuring maximum entropy and unpredictability. Whether you need a complex random password or a memorable passphrase, our tool provides instant generation with real-time strength analysis and entropy calculation.
All password generation happens entirely in your browser – we never send your passwords to any server or store them anywhere. You can customize length, character types, and apply advanced constraints like excluding similar characters or requiring at least one of each type. For added security, enable the optional breach check to verify your password hasn't appeared in known data breaches using the k-anonymity method that protects your privacy.
Frequently Asked Questions
How strong should a password be?
A strong password should be at least 12-16 characters long and include a mix of uppercase letters, lowercase letters, numbers, and symbols. The longer and more complex your password, the harder it is to crack. Our generator calculates entropy (randomness) in bits – aim for at least 60-80 bits for good security.
What's entropy and why does it matter?
Entropy measures the randomness and unpredictability of your password in bits. Higher entropy means more possible combinations, making brute-force attacks exponentially harder. A password with 80 bits of entropy would take billions of years to crack with current technology. Our tool shows entropy estimates to help you gauge password strength.
Are passphrases better than complex passwords?
Passphrases (like 'correct-horse-battery-staple') can be both strong and memorable. They're easier to remember than random character strings while still providing excellent security when using 4+ random words. Our passphrase generator uses a 2048-word list, giving each 4-word passphrase about 44 bits of entropy.
Do you store my passwords?
No, absolutely not. All password generation happens entirely in your browser using cryptographically secure random number generation. We never send your passwords to any server or store them anywhere. Only your settings preferences (like length and options) are saved locally in your browser.
What is a breach check and how does it work?
Our optional breach check uses the k-anonymity method with the Pwned Passwords API. Your password is hashed locally with SHA-1, and only the first 5 characters of the hash are sent to the API. The API returns all breached password hashes starting with those characters, and your browser checks if your full hash matches. Your actual password never leaves your device.
Can I use symbols safely?
Yes, symbols significantly increase password strength. However, some systems don't accept certain symbols. Our 'avoid ambiguous symbols' option excludes characters like brackets, slashes, and backticks that might cause issues with some systems. The 'exclude similar characters' option removes visually similar characters like O/0 and l/1 to prevent confusion.