Password Generator
Generate strong random passwords with a length slider and character options. Built on your browser's cryptographic random generator — nothing is ever sent or stored.
Your password
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Strength: —
Why generated passwords beat invented ones
Humans are terrible at randomness. We pick names, birthdays, cricket teams and keyboard walks — and attackers know it. Cracking tools try hundreds of millions of guesses per second, starting with dictionaries of leaked passwords and common patterns like Pakistan123!. A truly random 16-character password from a large character pool is a different beast entirely: there is no pattern to exploit, so an attacker is forced into brute force across an astronomically large space.
How to use this generator
Set the length with the slider, tick the character types you want, and a fresh password appears — press New password for another, and Copy to put it on your clipboard. The meter estimates strength from the password's entropy. Everything runs locally using crypto.getRandomValues(), your browser's cryptographically secure random number generator; nothing is transmitted, logged or saved, and we could not see your password even if we wanted to.
The maths of strength
With all four character sets ticked the pool is 86 characters, so each character adds about 6.4 bits. A 16-character password has roughly 103 bits of entropy — that's 2103 possibilities. Even at a trillion guesses per second, exhausting that space would take longer than the age of the universe. As a rule of thumb: under 40 bits is weak, 60+ is strong for online accounts, and 80+ resists offline cracking of stolen password files.
Worked example
Compare two 12-character passwords: cricketlover (lowercase dictionary words — crackable almost instantly) versus a generated x7#Kp2!vQz9m. The generated one draws from an 86-character pool: 12 × log₂(86) ≈ 77 bits, putting it firmly in the "strong" band. Length matters even more than symbols: going from 12 to 20 generated characters adds ~51 bits, squaring-and-more the attacker's work.
Good password habits
Use a unique password per account — the biggest real-world risk is a password leaked from one site being replayed on your email and bank accounts. A password manager (or your browser's built-in one) remembers them for you, so there is no need to memorise anything except one strong master password. Turn on two-factor authentication for email, banking and social accounts; it protects you even if a password does leak. And skip forced "clever" substitutions like P@kistan — cracking tools try those transformations automatically.
Frequently asked questions
Is it safe to generate a password on a website?
On this site, yes: generation uses your browser's crypto.getRandomValues() and runs entirely on your device. No password is transmitted or stored — you can verify by loading the page and switching off the internet; it still works.
How long should my password be?
16 characters with mixed types is a strong default for anything important. For a password manager's master password, consider 20+. Below 10 characters, even random passwords are becoming crackable offline.
Are symbols required for a strong password?
They help by enlarging the pool, but length is the bigger lever. A 20-character letters-and-digits password is stronger than a 12-character everything password. Some sites restrict symbols; untick them here if needed.
Should I use the same strong password everywhere?
No — reuse is the top cause of account takeovers. When one site is breached, attackers replay the leaked password everywhere. Unique passwords per site, stored in a password manager, is the safe pattern.
What does the 'bits' number mean?
Entropy bits measure how many possibilities an attacker must search: each extra bit doubles the work. ~60 bits resists online guessing; 80+ resists serious offline cracking of stolen hashes.