Password Generator - Create Strong Random Passwords Online

Generate a strong password in seconds

Pick your length, tick the character types you want, and the generator hands you a cryptographically random password ready to copy and paste. No account needed, nothing uploaded anywhere — every password is created right in your browser.

How to use the password generator

1. Set the length. Drag the slider or type a number. 16 characters is the minimum worth using for most accounts; go to 20+ for anything sensitive.
2. Choose character types. Tick uppercase letters, lowercase letters, numbers, and symbols. The more types you include, the harder the password is to crack.
3. Hit Generate. The tool creates a fresh random password (or a batch of them) instantly.
4. Copy it. Click the copy icon and paste it straight into your password manager or sign-up form.

Worked example

Say you need a 16-character password with uppercase, lowercase, numbers, and symbols. You tick all four boxes, set length to 16, and click Generate. You might get:

7Kq#mP2xRv!Yw5@n

That single password contains all four character types — the generator guarantees the mix so it satisfies even picky site requirements that demand "at least one number and one symbol."

How to generate a secure random password in code

If you need to do this programmatically, here are two minimal, real examples.

Python 3.6+ (uses the secrets module — the right choice for security-sensitive work, not random):

import secrets
import string

alphabet = string.ascii_letters + string.digits + string.punctuation
password = ''.join(secrets.choice(alphabet) for _ in range(16))
print(password)

JavaScript (Node.js or browser) — uses crypto.getRandomValues, the same cryptographically secure source this tool uses:

function generatePassword(length = 16) {
  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*';
  const array = new Uint32Array(length);
  crypto.getRandomValues(array);
  return Array.from(array, n => chars[n % chars.length]).join('');
}
console.log(generatePassword(16));

Both snippets are copy-pasteable and run as-is. Neither sends data anywhere.

How it works under the hood

The tool pulls random bytes from crypto.getRandomValues() — the browser's built-in cryptographically secure pseudorandom number generator (CSPRNG). That's the same source banks and security software use; it's far stronger than Math.random().

Those random bytes are mapped to whichever character set you selected, with a guarantee that at least one character from each ticked group is included. The result is assembled entirely in your browser tab — no server, no log, no storage.

For more on the Web Crypto API that powers this, see MDN: Crypto.getRandomValues().

How long should a password be? (Length vs. strength)

Length is the single biggest factor in how long a cracking attempt takes. Here's how it plays out with a fully mixed character set (uppercase + lowercase + numbers + symbols, ~94 characters total):

Recommendation: use at least 16 characters with all four character types turned on. For master passwords (password manager, email, banking), go to 20 or more — or use a long passphrase of 4-5 random words.

What actually makes a password strong?

Length and randomness matter most — not clever substitutions. Replacing an "a" with "@" or a "3" for "e" adds almost nothing against modern cracking tools, because every dictionary and rule list already includes those tricks.

A truly strong password is long (16+ characters), random (not a real phrase or pattern you invented), and unique (never reused across sites). That's exactly what this random password creator produces — every time you click Generate, you get something that has never existed before.

When to use it — and when not to

Use this tool when you're:

• Creating a new account and need a strong, unique password fast
• Resetting a compromised or weak password
• Generating passwords to store in a password manager (1Password, Bitwarden, KeePass, etc.)
• Building or testing an app that needs dummy credentials

Skip the random character password when:

• You need something memorisable — a passphrase (four random words, e.g. "correct-horse-battery-staple") is stronger than an 8-character password and far easier to remember.
• The site has an unusually short maximum length (under 12) — push back on that; it signals poor security on their end.

Your passwords never leave your device

Everything happens in your browser tab. The site has no server-side code involved in generation — there is no network request, no log, no database. You can even turn off Wi-Fi and the tool still works. Paste what you generate straight into your password manager and you're done.

Bottom line: a strong, unique, randomly generated password is the single easiest security win available. Generate one above and let your password manager remember it for you.