Online Password Generator

Create strong, random, and cryptographically secure passwords instantly. Powered by the Web Crypto API — everything runs in your browser and nothing ever leaves your device.

Use ⌘ + D to bookmark this tool
pwgen — generate password
guest@pwgen:~$ generate password --length=16 --all-chars
excellent · ~128 bits
length
16
charset
options
symbols
[init] crypto.getRandomValues() — ready
[info] all generation client-side · zero server requests

How Online Password Generator Works

🔒

Cryptographically Secure

Uses window.crypto.getRandomValues() — the same entropy source used by banks and security software.

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100% Browser-Based

No data ever leaves your device. Zero server requests, zero logging, zero tracking. Verify in DevTools.

⚡

Open & Transparent

Inspect the source code in your browser. No obfuscation, no hidden network calls — what you see is what runs.

Our free password generator uses crypto.getRandomValues() to produce truly random passwords that resist brute-force, dictionary, and rainbow table attacks. Choose your length (4–128 characters), select character types, exclude ambiguous characters, and copy your password in one click. No sign-up, no ads, no tracking — just secure passwords generated on your device.

Password Length vs Security (2026)

LengthEntropyBrute Force TimeRecommended For
12 chars72 bits3 weeksSocial Media
16 chars96 bits34,000 yearsEmail / Banking
24 chars144 bitsTrillions of yearsCrypto / API Keys

What Makes a Strong Password?

✓
Uppercase (A-Z)26 letters
+26 chars
✓
Lowercase (a-z)26 letters
+26 chars
✓
Numbers (0-9)10 digits
+10 chars
✓
Symbols (!@#$)32 special characters
+32 chars

Think Your Password Is Strong Enough?

> brute_force_sim --test

Enter a password (or your birthday) and watch how fast a computer can crack it.

10 Rules for Creating Strong Passwords

  1. Use at least 16 characters. Every additional character exponentially increases the time needed to crack your password. 16 is the new minimum for serious security.
  2. Mix character types. Combine uppercase, lowercase, numbers, and symbols. A password using all four types from a 95-character pool is vastly harder to crack than letters alone.
  3. Avoid dictionary words. Attackers use wordlists containing millions of common words, phrases, and passwords. "sunshine2024" falls in seconds.
  4. Never reuse passwords. When one site gets breached, attackers try those credentials on every other site. One password per account, no exceptions.
  5. Don't use personal information. Your name, birthday, pet's name, and phone number are all easy to find on social media. Attackers check these first.
  6. Avoid common patterns. "Password1!", "Qwerty123", and keyboard walks like "1qaz2wsx" are in every attacker's wordlist.
  7. Use a password manager. You can't memorize 50+ unique random passwords. A password manager does it for you securely.
  8. Enable two-factor authentication. Even the strongest password can be phished. 2FA adds a second layer that's much harder to bypass.
  9. Change passwords after breaches. Use services like Have I Been Pwned to check if your accounts have been compromised, and change them immediately if so.
  10. Generate, don't create. Humans are terrible at randomness. Use a cryptographic generator (like this one) instead of trying to think of something "random."

Why Do You Need a Strong Password?

In 2024, over 10 billion credentials were exposed in data breaches worldwide. Attackers use automated tools that can test billions of password combinations per second against stolen password hashes. A short or predictable password doesn't stand a chance.

Modern GPUs can compute over 100 billion MD5 hashes per second. That means a random 8-character lowercase password (26^8 ≈ 208 billion combinations) can be cracked in about 2 seconds. Add uppercase, numbers, and symbols and increase the length to 16+ characters, and the same attack would take longer than the age of the universe.

The math is simple: length and randomness are your best defense. This is why security experts universally recommend using randomly generated passwords of 16 characters or more, stored in a password manager.

Isn't My Birthday Sufficient as a Password?

No. A date of birth in any common format (DDMMYYYY, MM/DD/YYYY, etc.) contains at most 8 digits. That's only 10^8 = 100 million possible combinations. At 10 billion guesses per second, an attacker cracks it in 0.01 seconds.

Even if you combine your birthday with a name or word, attackers specifically target these patterns. "John1990" or "15march85" are among the first things automated tools try. Use the simulator above to see for yourself how fast common passwords fall.

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Test how strong your password is. See estimated crack time, entropy, and suggestions.
#️⃣

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Generate MD5 hashes from any text. Useful for checksums, cache keys, and legacy system compatibility.
#️⃣

SHA-512 Hash Generator

Generate SHA-512 hashes using the native Web Crypto API. 512-bit security for signatures and integrity.

Frequently Asked Questions

Is this password generator secure?

Yes. We use the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure random numbers directly from your operating system's entropy source. No passwords are ever sent to our servers.

What makes a strong password?

A strong password is at least 16 characters long and uses a mix of uppercase, lowercase, numbers, and symbols. This gives over 100 bits of entropy, making it practically impossible to brute-force.

How long should my password be?

We recommend at least 16 characters for important accounts and 24+ characters for maximum security. Each additional character makes your password exponentially harder to crack.

Do you store any passwords?

No. Everything runs entirely in your browser using JavaScript. No data is transmitted, logged, or stored. You can verify this in your browser's developer tools network tab.

Can I use this for work / enterprise?

Absolutely. Since passwords are generated locally using cryptographically secure methods, this tool is suitable for generating passwords for any purpose, including enterprise environments.

Why not just use my browser's built-in generator?

Browser generators are great but offer limited customization. This tool lets you control length, character sets, exclude similar characters, and more — essential when dealing with different sites' password requirements.

Can I use Math.random() to generate passwords?

No. Math.random() is a pseudorandom number generator (PRNG) — it's fast but predictable. Its output is determined by an internal seed, which means an attacker who discovers the seed can reproduce every "random" value it generates. For passwords, you need a cryptographically secure random number generator (CSPRNG) like crypto.getRandomValues(), which draws entropy from your operating system's hardware sources and is designed to be unpredictable even if previous outputs are known.

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