Create strong, random passwords instantly. Customize length and character types. Free, private, and no sign‑up required.
window.crypto.getRandomValues() (same as browsers use for HTTPS). Your passwords never leave your device.
Using weak or reused passwords is one of the biggest security risks online. A strong, unique password is your first line of defense against hacking, identity theft, and data breaches. Our password generator creates truly random passwords that are impossible to guess but easy to manage with a password manager.
All password generation happens locally in your browser using window.crypto.getRandomValues() – the same method used by modern browsers for cryptographic security. We never send your password anywhere. You can adjust length and character sets, and the strength meter updates in real time using entropy calculations (bits of randomness).
The estimated time to crack a password is based on its entropy and an attack rate of 1 trillion guesses per second (a realistic high‑end brute‑force scenario). This gives a conservative lower bound – real‑world attacks may be slower.
The strength meter is based on entropy, measured in bits. Higher entropy means a password is harder to crack. Our calculation accounts for:
As a rule of thumb: ≥ 60 bits is considered strong for most purposes, and such a password would take thousands of years to crack.
Yes. We use JavaScript's crypto.getRandomValues() which provides cryptographically strong random values suitable for security‑sensitive applications.
No. All processing is done in your browser. We never see, store, or transmit your generated passwords.
For most accounts, 12–16 characters with a mix of character types provides excellent security. The slider lets you choose between 4 and 32 characters.
Entropy is a measure of unpredictability. For example, a password with 60 bits of entropy would require an average of 260 guesses to crack. Higher is better.
We assume a very powerful attacker capable of 1 trillion (1012) guesses per second. The time equals 2(entropy-1) / guesses_per_second seconds, then converted to years/days/hours for readability.