Password Generator
Generate strong, truly random passwords instantly. Customise length and character types. Passwords are generated in your browser and never transmitted anywhere.
Generate Secure Password
Why Use a Password Generator?
Humans are terrible at creating truly random passwords. We gravitate toward patterns, words, dates, and keyboard walks like "qwerty123" — all of which are trivially cracked by modern tools. This free password generator uses the browser's cryptographic random number generator (window.crypto) to produce genuinely unpredictable passwords that are mathematically very hard to crack.
How Long Should Your Password Be?
A 12-character password using all character types has about 95^12 ≈ 540 quintillion possible combinations. At 1 billion guesses per second, that would take ~17 years to brute force. A 16-character password raises that to billions of years. Always use at least 12 characters for important accounts, 16+ for banking and email.
Password Security Best Practices in 2026
Use a unique password for every account — reuse is the biggest password security risk. Store passwords in a reputable password manager (Bitwarden, 1Password, or your browser's built-in vault). Enable two-factor authentication (2FA) on all critical accounts. Never share passwords via email, SMS, or chat — these channels are not secure.
Why This Generator Is Safe
All passwords are generated entirely inside your browser using the Web Crypto API. Nothing is sent to any server, logged, or stored anywhere. CalcSpace has no access to any password you generate here.