Free Secure Password Generator
Create strong, random passwords that are nearly impossible to crack — right in your browser. Nothing is ever sent to a server.
Password Checkup
Test a password you already use. It's analyzed locally — and the breach check only ever sends a partial, anonymized hash (never your password).
🔒 Uses the Have I Been Pwned k-anonymity model: only the first 5 characters of your password's SHA-1 hash are sent. Your password never leaves this device.
Why use a password generator?
Reusing the same password across sites is the single biggest cause of account takeovers. If one site is breached, attackers try those same credentials everywhere else — a technique called credential stuffing. A unique, random password for every account stops that cold.
Human-chosen passwords are predictable: we lean on names, dates, and common substitutions like P@ssw0rd. Modern cracking tools test billions of those guesses per second. A truly random password has no pattern to exploit, so the only way to break it is brute force — which becomes impractical fast as length grows.
How strong should my password be?
- 12 characters — the practical minimum for everyday accounts.
- 16 characters — recommended for email, banking, and anything important.
- 20+ characters — for password manager master passwords and high-value accounts.
Length matters more than complexity. A long passphrase of random words is both stronger and easier to remember than a short string of symbols. The entropy figure shown above estimates how unpredictable your password is, measured in bits — more bits means exponentially harder to crack.
Is this password generator safe to use?
Yes. Everything happens locally in your browser using the crypto.getRandomValues() API — the same cryptographically secure randomness browsers use for encryption. Your passwords are never transmitted, logged, or stored anywhere. You can verify this by opening your browser's Network tab: generating a password makes zero network requests. For maximum safety, you can even disconnect from the internet, generate, and reconnect.
Tips for staying secure
- Use a password manager (Bitwarden, 1Password, KeePass) so you never have to memorize random passwords.
- Turn on two-factor authentication (2FA) wherever it's offered — it blocks most attacks even if a password leaks.
- Never reuse passwords across accounts, especially email — your inbox can reset every other password.
- Use a memorable passphrase for the few passwords you must type by hand, like your device login.
Frequently Asked Questions
Are these passwords really random?
Yes. We use the browser's cryptographically secure random number generator (crypto.getRandomValues), not the predictable Math.random(). We also use rejection sampling so every character is equally likely, with no statistical bias.
Do you store or see my passwords?
Never. There is no server-side processing. The page runs entirely on your device. Once you close the tab, the generated password is gone unless you've saved it yourself.
What's a passphrase and when should I use one?
A passphrase is several random words joined together, like river-tiger-maple-cloud. They're far easier to remember and type than symbol soup, while still being very strong. Use them for passwords you enter manually.
Can I use this offline?
Yes. Once the page has loaded, it works without an internet connection. You can save the page and run it locally.