Most hacked accounts fall to weak or reused passwords, not sophisticated attacks. A strong password is long, random, and unique per site — three properties human brains are terrible at producing but computers nail effortlessly. This free generator creates cryptographically random passwords using your browser's secure random number generator.
Length beats complexity: a 16-character random password has about 95 bits of entropy, meaning even a billion-guesses-per-second attacker needs millions of years. The strength meter under each password shows the math, so you can see exactly what you are getting.
Crucially, passwords are generated locally and never leave your device — there is no server, no log, and nothing to intercept. Pair unique generated passwords with a password manager and two-factor authentication for genuinely strong account security.
How to use the Password Generator
- Set the length with the slider — 16+ characters recommended.
- Choose character sets: uppercase, lowercase, digits, symbols (all four is strongest).
- Click Generate password for a fresh random password and its strength rating.
- Copy it straight into a password manager — never reuse it elsewhere.
Tips for accurate results
- Unique per site matters more than anything: one breach must not unlock everything.
- Aim for 16+ characters; 20+ for banking and email.
- Avoid ambiguous characters (O/0, l/1) when you must type passwords manually.
- Enable two-factor authentication wherever offered — it beats even the best password.
Why random beats clever
Human-‘clever’ passwords (“Tr0ub4dor&3”) follow predictable patterns attackers model; truly random strings have no pattern to model. At equal length, randomness always wins — which is why generated passwords plus a manager beat memorized ones every time.
Frequently asked questions
How long should a password be?
At least 12 characters; 16–20 is the sweet spot for important accounts. Each extra random character multiplies cracking time enormously.
Is it safe to generate passwords online?
With this tool, yes: generation uses window.crypto.getRandomValues() locally in your browser. Nothing is sent to any server — you can even disconnect from the internet first.
Should I use symbols in passwords?
They help, but length helps more. A 20-character letters-only password beats an 8-character one with symbols.
What is password entropy?
Entropy (in bits) measures unpredictability: ~2^bits guesses needed on average. 80+ bits is strong; 100+ is effectively uncrackable.