Password Generator & Strength Checker
Generate strong, cryptographically random passwords and check their strength — entirely in your browser, free and with no signup required.
Password Generator + Strength Checker
Uses for cryptographically secure randomness. Nothing is transmitted or stored.
What makes a strong password?
A strong password resists both guessing and brute-force attacks. Length is the single biggest factor — every extra character makes automated cracking exponentially harder — so aim for at least 16 characters when the account supports it. Mixing uppercase, lowercase, numbers and symbols adds further entropy, but a long random password beats a short "complex" one every time. Avoid dictionary words, names, dates or keyboard patterns (like qwerty123), since these are the first things cracking tools try.
Frequently asked questions
Is this password generator safe to use?
Yes. Passwords are generated entirely in your browser using the Web Crypto API's crypto.getRandomValues() method. Nothing is transmitted to a server or stored anywhere — check your browser's network tab if you want to confirm it yourself.
What makes a password strong?
A strong password is long (16+ characters), fully random rather than based on words or patterns, and mixes character types. Length matters more than complexity for resisting brute-force attacks.
How long should my password be?
Most current guidance recommends at least 16 characters for important accounts. Pair a generated password like this with a password manager so you never need to remember or reuse it.
Should I reuse the same password on multiple sites?
No. Reusing passwords means a breach on one site can expose your accounts everywhere else. Generate a unique password for every account and store them in a password manager.