Password & Passphrase Generator
Generate secure, random passwords and memorable passphrases with advanced customizable options.
Your Guide to Creating Unbreakable Passwords
In today's digital world, a strong password is your first line of defense against cyber threats. A weak or reused password can expose your most sensitive information. This tool is designed not just to generate secure passwords, but to help you understand the principles of modern password security.
Your Security is Our Priority
This tool is 100% client-side. All passwords and passphrases are generated directly on your device in your browser. **Nothing is ever sent to our servers.** Your privacy and security are guaranteed.
What Makes a Password Strong? The Science of Entropy
Password strength isn't about using your pet's name and the year. True security comes from randomness, which is measured in **entropy**. Entropy, measured in "bits," calculates a password's unpredictability.
- Brute-Force Attack: A method where a hacker uses a computer to try every possible combination of characters until they guess your password.
- Entropy's Role: Each "bit" of entropy doubles the number of guesses a computer would have to make. A password with 60 bits is twice as hard to crack as one with 59 bits. A password with 128 bits is considered computationally secure against brute-force attacks with current technology.
Length vs. Complexity: What Matters More?
While complexity (using symbols, numbers, etc.) is good, **length is exponentially more important.** Consider the famous XKCD example:
- A complex password like `Tr0ub4dor&3` is hard for a human to remember but relatively easy for a computer to guess (approx. 44 bits of entropy).
- A simple passphrase like `correct-horse-battery-staple` is easy for a human to remember but incredibly hard for a computer to guess (approx. 77 bits of entropy).
Our tool's "Passphrase" mode leverages this principle to create passwords that are both highly secure and memorable.
Frequently Asked Questions (FAQ)
Is this password generator safe to use?
Yes. Our password generator is completely safe. All passwords and passphrases are generated entirely on your device (in your browser). Nothing is ever sent to our servers or stored anywhere. You can verify this by disconnecting from the internet after the page has loaded—the tool will still work perfectly.
What is the difference between a password and a passphrase?
A password is typically a shorter string of random characters, numbers, and symbols (e.g., 'Tr0ub4dor&3'). A passphrase is a sequence of random words (e.g., 'correct-horse-battery-staple'). Modern security research shows that long passphrases are often more secure and significantly easier for humans to remember than complex passwords of a shorter length.
What is password entropy?
Password entropy, measured in 'bits,' is a measure of a password's unpredictability and randomness. A higher bit number means there are more possible combinations, making it exponentially harder for a computer to guess through a brute-force attack. A password with 128 bits of entropy is considered extremely secure.
Should I use a password manager?
Yes, absolutely. It is the most recommended way to manage digital security. A password manager allows you to generate and store unique, complex passwords for every single account you own without having to memorize them. You only need to remember one master password to unlock your vault.
