Password Generator — Generate Strong, Secure Passwords Free
NewGenerate strong, secure passwords instantly
Generate cryptographically secure passwords with custom length (8–128 chars), uppercase, lowercase, numbers, and symbols. Includes strength indicator.
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About Password Generator
A strong password is the first line of defence against unauthorised account access. This generator creates cryptographically secure random passwords using the browser's Web Crypto API — the same randomness source used by security-sensitive applications — ensuring that generated passwords cannot be predicted by an attacker even with knowledge of the generation algorithm.
Password strength is primarily determined by length and character set diversity. A 12-character password using uppercase letters, lowercase letters, digits, and symbols has over 4 × 10^21 possible combinations — far beyond the reach of brute-force attacks with current computing power. Increasing length to 20 characters raises this to approximately 10^36 combinations.
Common character set options include: uppercase letters (A–Z), lowercase letters (a–z), digits (0–9), and symbols (!@#$%^&*). Combining all four with a length of 16+ characters is the recommended baseline for accounts that protect sensitive data.
The strength indicator provides real-time entropy estimation, helping you understand the practical security level of the configuration. The bulk generation mode produces multiple passwords at once — useful for provisioning accounts, generating Wi-Fi passphrases, or creating test credentials. All generation is local to your browser; no passwords are logged, stored, or transmitted.
Frequently Asked Questions
How secure are the generated passwords?
Passwords are generated using the Web Crypto API (crypto.getRandomValues()), which provides cryptographically secure random numbers. This is the same randomness source used by security-critical applications.
Are my generated passwords stored anywhere?
No. Passwords are generated entirely in your browser and are never transmitted to any server. No history is kept. Close the tab and the passwords are gone.
What makes a password strong?
Length is the most important factor — each additional character exponentially increases the search space. A 20-character random password with mixed characters has approximately 10^36 possible combinations, making brute-force attacks impractical.
Should I use a password manager?
Yes. Randomly generated passwords are difficult to memorise, especially across multiple accounts. A reputable password manager stores and auto-fills complex passwords securely.