Password Generator

What is Password Generator?

Password Generator creates cryptographically strong random passwords using the Web Crypto API's getRandomValues method. It supports configurable length from 8 to 128 characters, with toggleable character sets including uppercase letters, lowercase letters, digits, and special symbols. The tool displays a real-time strength meter based on entropy calculation and checks passwords against common pattern weaknesses.

System administrators creating service credentials, developers generating application secrets, and security-conscious users creating strong personal passwords. The tool runs entirely in your browser — your data never leaves your device.

How to Use Password Generator

1. Set the desired password length using the slider or number input
2. Toggle character sets on or off — uppercase, lowercase, digits, and symbols
3. Optionally exclude ambiguous characters like 0, O, l, and 1 to avoid confusion when reading
4. Click Generate to produce a new password — the strength meter updates immediately
5. Copy the password to clipboard and store it in your password manager

Common Use Cases

• Generating unique passwords for new service accounts and storing them in a password manager
• Creating strong database credentials for PostgreSQL, MySQL, or Redis instances
• Producing API secrets and webhook signing keys with sufficient entropy
• Generating random passphrases as alternatives to complex character passwords
• Creating one-time-use passwords for temporary access grants

Pro Tips

• Aim for at least 16 characters with all character sets enabled — this provides over 100 bits of entropy, which is considered very strong against brute-force attacks
• Exclude similar-looking characters (0/O, l/1, I) if the password will ever need to be typed manually rather than pasted
• Passphrases of 4-5 random dictionary words can be both stronger and more memorable than short complex passwords — consider passphrase mode for human-typed credentials

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: Entropy, CSPRNG, Password manager, bcrypt.

Frequently Asked Questions