Free Online Password Generator
Generate strong, random passwords instantly with this free online password generator. Choose your password length from 4 to 128 characters and customize which character types to include — uppercase letters, lowercase letters, numbers, and symbols. Every password is generated using your browser's cryptographic random number generator (crypto.getRandomValues), the same source of randomness used by password managers. A real-time strength meter shows the entropy in bits so you can see exactly how secure your password is before copying it. The generator auto-creates a new password whenever you change any setting, and a regenerate button lets you cycle through options. One-click copy puts the password on your clipboard instantly. All generation happens entirely in your browser — no passwords are ever sent to a server, stored, or logged. Whether you need a quick password for a new account, a strong passphrase for a database, or a random string for an API key, this tool delivers cryptographically secure results in one click.
Frequently Asked Questions
Very secure. This tool uses crypto.getRandomValues(), the same cryptographic random number generator built into your browser that password managers and security applications rely on. It produces truly random output that cannot be predicted. A 16-character password with all character types enabled has about 105 bits of entropy — it would take billions of years to crack with current technology.
No. All password generation happens entirely in your browser using JavaScript. No passwords are transmitted to any server, stored in any database, or logged anywhere. The passwords exist only in your browser's memory and your clipboard. You can verify this by checking the network tab in your browser's developer tools.
For most accounts, 16 characters with a mix of uppercase, lowercase, numbers, and symbols is more than sufficient. For high-security applications (master passwords, encryption keys), use 20-32 characters. The strength meter shows the entropy in bits — aim for at least 60 bits for everyday use and 80+ bits for critical accounts.
Password strength depends on two factors: length and character variety. A longer password with more character types (uppercase, lowercase, numbers, symbols) is exponentially harder to crack. A 12-character password using only lowercase letters has about 56 bits of entropy, while adding uppercase, numbers, and symbols increases it to about 79 bits — making it roughly 8 million times harder to crack.
Yes. Humans are terrible at generating random passwords — we tend to use predictable patterns, dictionary words, and personal information. Password generators produce truly random strings with no patterns for attackers to exploit. Use a generated password with a password manager for the best security.
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