Secure Password Generator & Entropy Analyzer

Create cryptographically strong passwords or test your own. Local browser generation.

Random Characters Memorable Words Check Your Own

Security Score

Strong Estimated time to crack: ... Entropy: ... bits

Password Length 16

Uppercase (A-Z)

Lowercase (a-z)

Numbers (0-9)

Symbols (!@#$...)

Generated locally using window.crypto.getRandomValues().

Time to Crack a Password

Estimated time required to brute-force a password using modern hardware capable of computing 100 billion hashes per second. Note how length drastically multiplies the time required.

Length	Numbers Only	Lowercase Letters	Upper & Lowercase	Mixed (Numbers, Cases, Symbols)
8 chars	Instantly	Instantly	8 Minutes	1 Hour
10 chars	Instantly	23 Minutes	16 Days	5 Years
12 chars	10 Seconds	11 Days	600 Years	35k Years
14 chars	16 Minutes	18 Years	2M Years	250M Years
16+ chars	27 Hours	13M Years	Billions of Years	Billions of Years

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Mastering Password Security

A strong password is your first line of defense. Here is what you need to know.

Length beats Complexity

A password's strength relies exponentially on its length. An 8-character password with letters, numbers, and symbols can be cracked in minutes. A 16-character password using only lowercase letters would take centuries. Always prioritize length.

What is Entropy?

Entropy is a mathematical measure of unpredictability, calculated in bits. It answers a simple question: How large is the pool of possibilities the attacker has to guess from? An entropy above 80 bits is considered highly secure against modern offline attacks.

Beyond the Password

A good password is useless if it's stolen from a breached database. Never reuse passwords across different sites. Furthermore, always enable Two-Factor Authentication (2FA) (preferably using an authenticator app or hardware key).

Use a Password Manager

Human brains aren't built to memorize dozens of 16-character random strings. A Password Manager securely stores your unique passwords in an encrypted vault, so you only need to remember one master password.

Try Proton Pass