Password Generator
Enter your values below and click Calculate for instant results.
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Generate strong random passwords with custom length, character types, and options. Includes one-click copy.
Enter your values below and click Calculate for instant results.
Password strength is measured by entropy, which represents how many guesses an attacker would need to crack it through brute force. Entropy is determined by two factors: the length of the password and the size of the character pool it was drawn from. Longer passwords and larger character pools produce exponentially more possible combinations.
A 16-character password using uppercase, lowercase, numbers, and symbols has over 95 trillion trillion possible combinations, making brute force attacks practically impossible with current technology. A 6-character password using only lowercase letters has about 300 million combinations, which modern computers can crack in seconds.
Use a unique password for every account. Reusing passwords means one breach exposes everything. Use a password manager to store complex passwords you could never memorize. Enable two-factor authentication wherever possible, since even a strong password can be stolen through phishing or data breaches. Change passwords for sensitive accounts if you learn a service you use has been compromised.
Dictionary attacks try thousands of common words, names, dates, and simple substitutions (replacing o with 0, a with @) before even attempting random character combinations. A password like "P@ssw0rd!" has extremely low entropy despite containing numbers, uppercase, and symbols, because attackers know these patterns. Randomly generated passwords cannot be targeted by dictionary attacks.