What is a Password Generator?
A password generator creates random strings of characters designed to serve as secure passwords. Unlike human-chosen passwords that tend to follow predictable patterns, generated passwords use true randomness to resist brute force attacks, dictionary attacks, and credential stuffing. Our tool uses the Web Crypto API (crypto.getRandomValues) to produce cryptographically secure random values, the same source of randomness used by encryption libraries and security protocols. Every password is generated entirely in your browser with no server involvement.
How to Use This Tool
Adjust the length slider to set your desired password length (4 to 128 characters). Select which character types to include: lowercase letters, uppercase letters, numbers, and symbols. Set the count to generate multiple passwords at once (up to 50). The strength indicator updates in real time, showing the estimated security level based on the entropy (randomness) of your configuration. Click "Generate Passwords" and use the copy button next to each password to transfer it to your password manager or application.
Common Use Cases
- Creating strong, unique passwords for online accounts, email services, and cloud platforms
- Generating API keys, secret tokens, and encryption passphrases for development environments
- Producing temporary passwords for new user accounts, password resets, or onboarding workflows
- Generating multiple passwords at once when setting up test accounts or staging environments
Why Use a Client-Side Tool?
Passwords are the most sensitive type of data you handle online. Using a server-based password generator means your passwords travel across the network and could be logged, intercepted, or stored by a third party. Our generator runs entirely in your browser. The Web Crypto API provides hardware-backed randomness on supported devices, and no passwords are ever transmitted or stored. This is the safest way to generate passwords outside of a local command-line tool or a trusted password manager.
Frequently Asked Questions
How long should my password be?
Security experts recommend a minimum of 12 characters, but 16 or more is ideal for sensitive accounts. Each additional character exponentially increases the number of possible combinations an attacker must try. A 16-character password with mixed character types provides over 100 bits of entropy, which is considered very strong.
What does the strength indicator measure?
The strength indicator calculates entropy in bits based on your password length and the size of the character set. Higher entropy means more possible combinations and greater resistance to brute force attacks. "Very Strong" passwords have 128 or more bits of entropy, making them practically impossible to crack with current technology.
Are symbols necessary for a strong password?
Symbols increase the character set size, which adds entropy per character. However, length matters more than complexity. A 20-character password using only lowercase letters and numbers can be stronger than a 10-character password with all character types. If a service restricts certain symbols, compensate by increasing the length instead.