How Secure Is My Password?
Password strength is determined by entropy — the number of possible combinations an attacker must test to guess it. Every character you add and every unique character type you use exponentially increases the combinations. A simple formula: combinations = (character_set_size) ^ (password_length). Understanding entropy helps you create and evaluate truly secure passwords.
Password Generator — 8 to 12 Characters
Generate cryptographically secure passwords from 8 to 12 characters instantly. Choose your length, character set, and quantity. Powered by the Web Crypto API — your passwords never leave your browser.
Estimated crack time:—
Generate a Secure Password — Choose Your Length (8–12 Characters)
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PassCraft generates passwords from 8 to 12 characters using your browser's Web Crypto API — the same cryptographic standard used by banks and security software. No data is ever sent to a server.
Frequently Asked Questions
How many characters should my password be?
Security experts recommend 8 characters as the minimum, with 12 characters or more for important accounts. PassCraft lets you generate passwords from 8 to 12 characters (or any length you choose) in seconds.
Is an online password generator safe to use?
PassCraft is safe because it runs entirely in your browser using the Web Crypto API. Unlike other tools, your passwords are generated locally and never transmitted, stored, or logged on any server.
What's the difference between an 8-character and 12-character password?
A 12-character random password is approximately 500,000 times stronger than an 8-character one due to the exponential increase in possible combinations. For most accounts today, 12 characters is the recommended minimum.
Password Strength by Length
| Length | Combinations | Time to Crack |
|---|---|---|
| 8 characters | 6.4 quadrillion | Days to weeks |
| 10 characters | 839 quadrillion | Months |
| 12 characters | 3.2 sextillion | Years |
| 16 characters | 184 sextillion | Millennia |
| 20 characters | 10.8 septillion | Eons |
What Makes a Password Weak?
- Dictionary words: "password123" seems random but contains real words — dictionary attacks test these first
- Names and dates: Personal information like birthdates or names are easy to guess or find
- Predictable patterns: "qwerty", "123456", keyboard walks — attackers try these immediately
- Reused across sites: Using the same password means one breach compromises all accounts
- Too short: Under 8 characters, any password can be cracked in hours regardless of character mix
Generate a Provably Secure Password
Random character generation is the most reliable way to create strong passwords. Use PassCraft above to generate a password with 12+ characters, all character types enabled. Every PassCraft password uses the Web Crypto API for true randomness.
Frequently Asked Questions
What is password entropy?
Entropy measures the unpredictability of a password. Higher entropy means more possible combinations and longer time to crack. It is calculated as: entropy = log2(charset_size ^ length).
How long would it take to crack my password?
A modern GPU can test billions of passwords per second. An 8-character password with full character set takes days. A 12-character password takes thousands of years.
Is a long password with simple words secure?
Not if the words are in a dictionary. Dictionary attacks test word combinations first. Use random characters or a 5+ word passphrase with random, uncommon words.