Password Generator
Why Strong Passwords Matter
According to the Verizon 2024 Data Breach Investigations Report, 81% of hacking-related breaches leveraged stolen or weak passwords. Passwords remain the most common attack surface for account takeovers.
Using a password manager paired with randomly generated passwords from this tool is currently the most effective protection: a unique, high-entropy password per account means a single breach cannot cascade to your other accounts.
How This Generator Works Securely
This tool uses your browser's built-in Web Crypto API (crypto.getRandomValues), a standardized CSPRNG (Cryptographically Secure Pseudo-Random Number Generator) directly backed by the OS entropy source — unpredictable and unbiased.
All computation happens locally on your device. No requests are sent to any server, no logs are kept, and everything disappears when you close the page. The source is open for anyone to audit.
Why Every Account Needs a Unique Password
Password reuse is the root cause of credential stuffing attacks: attackers take leaked username+password pairs and automatically try them across every major platform. The HaveIBeenPwned database has catalogued over 14 billion breached credentials.
The fix is simple: generate a unique random password for every account with this tool and store them in a password manager (Bitwarden, 1Password, etc.). You only need to remember one master password.
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Frequently Asked Questions
Is this password generator safe to use? +
Completely safe. Passwords are generated locally in your browser using the Web Crypto API (crypto.getRandomValues) for cryptographically secure randomness. Nothing is sent to any server, and no data is stored after you close the page.
How long should a password be to be secure? +
NIST 2024 guidelines recommend at least 12 characters for most accounts; 16+ for important accounts like banking and email; 20+ for administrator accounts. This tool defaults to 16 characters and supports up to 128.
Random password vs passphrase — which is more secure? +
A 16-character random password from the full character set has ~95 bits of entropy. A 4-word Diceware passphrase has ~51 bits. Random passwords are harder to brute-force; passphrases are easier to memorize. If you use a password manager, random passwords are the best choice.
How do I meet company password policy requirements? +
Check the character types your policy requires, set the length to meet the minimum, then generate. Most enterprise policies require: uppercase + lowercase + numbers + symbols, 12+ characters.
Can I generate multiple passwords at once? +
Yes. Increase the Count field (up to 50), click Generate, and all passwords appear at once — one per line. Use "Copy All" to copy them in bulk.
How does this password generator work? +
This tool uses your browser's built-in Web Crypto API (crypto.getRandomValues) to generate cryptographically secure random bytes, then maps them to characters from your chosen set to form a password of the requested length. Everything runs client-side with no server requests.
How often should I change my password? +
NIST SP 800-63B advises against forced periodic password changes — frequent rotation often causes users to choose weaker, predictable passwords. Change immediately if: you receive a breach notification, detect suspicious login activity, or a shared account needs securing. Unique passwords per site limit the blast radius of any breach.
What are the most common password mistakes? +
The most common mistakes: ① Reusing the same password across sites; ② Using personal info like names or birthdays; ③ Passwords shorter than 8 characters; ④ Simple character substitutions like p@ssw0rd — these are in every attack dictionary; ⑤ Logging in over unencrypted public Wi-Fi. A unique random password per site, stored in a password manager, eliminates all of these.