Password Generator
Generate strong, secure, random passwords with customizable length and character sets.
🔐 Generated Password
About the Password Generator
Our Password Generator helps you create highly secure, random passwords instantly. The strength of a password relies on its entropy (often measured using Shannon entropy), which calculates the unpredictability of the string based on its length and the pool of available characters.
To ensure complete privacy and security, all random generation is performed locally in your browser using secure math APIs like window.crypto.getRandomValues or standard secure pseudorandom number math. This means your passwords are never sent to or stored on any server, keeping your data entirely in your hands.
Frequently Asked Questions
What makes a password secure and strong?
A strong password is long (at least 12-16 characters), unpredictable, and uses a mix of uppercase letters, lowercase letters, numbers, and special symbols. Avoid using dictionary words or personal information.
How is password strength/entropy calculated?
Password entropy is measured in bits. It is calculated by taking the base-2 logarithm of the number of possible character combinations. For example, a 12-character password using all character types has about 78 bits of entropy, which is considered very strong.
Is it safe to generate passwords using online web tools?
Yes, provided the tool uses client-side scripting (like JavaScript) and secure cryptographic functions (like Web Crypto API) to generate the passwords locally on your device, ensuring nothing is transmitted over the internet.
Why should I include symbols and numbers in passwords?
Including symbols and numbers increases the pool of possible characters from just 52 (uppercase and lowercase letters) to over 90. This exponentially increases the difficulty for hackers using brute-force attacks.
How often should I change my passwords?
Current security guidelines suggest changing passwords only if you suspect they have been compromised. Regularly forced changes often lead to weaker passwords. Instead, focus on unique, strong passwords for every account and use a password manager.