Free Password Generator Online

What is a password generator?

A password generator is a tool that creates random, unpredictable passwords using a cryptographically secure algorithm. Unlike passwords you create yourself — which tend to follow patterns, use dictionary words, or reuse elements you can remember — a generated password has no structure that an attacker can exploit.

This tool uses the Web Crypto API — the same source of randomness that your operating system and browser use for cryptographic operations. Every password is generated locally in your browser. Nothing is transmitted to any server, stored in logs, or accessible to anyone other than you.

The NIST Digital Identity Guidelines recommend passwords of at least 15 characters for general use. Our generator supports lengths up to 64 characters with full control over character sets — uppercase letters, lowercase letters, numbers, and symbols.

How to use the password generator

1. 1
   Set your password length

   Use the length slider to choose between 8 and 64 characters. For most accounts, 16–20 characters provides an excellent balance of security and usability. For critical accounts like email or banking, use 24 or more.

2. 2
   Choose your character types

   Enable uppercase letters (A–Z), lowercase letters (a–z), numbers (0–9), and symbols (!@#$...). Using all four character types maximises entropy — the measure of randomness in your password.

3. 3
   Generate and copy

   Click Generate or press the refresh button. Your new password appears instantly. Click the copy icon to copy it to your clipboard — it stays there for 30 seconds before being cleared for security.

4. 4
   Save it in a password manager

   Paste the password directly into your password manager (Bitwarden, 1Password, Dashlane) before using it anywhere else. Never store passwords in plain text files or browser notes.

What makes a password strong?

Password strength is measured in entropy — the number of bits of randomness. A password with 80+ bits of entropy is considered strong by modern standards. Every additional character and character type exponentially increases entropy, making brute-force attacks exponentially harder.

Contrary to popular belief, length matters more than complexity. A 20-character lowercase password is significantly harder to crack than an 8-character password with symbols. That said, combining length with character variety gives you the best protection against brute-force attacks and dictionary attacks.

An alternative to random passwords is a passphrase — a sequence of 4-6 random words like "correct-horse-battery-staple". Passphrases are long, high-entropy, and easier to remember. For accounts where you need to type the password manually, a passphrase is often the better choice.

Estimates based on 10 billion attempts per second (modern GPU brute-force).

When to use a password generator

You should use a password generator for every new account you create. Here are the most important use cases:

Common password mistakes to avoid

Even security-conscious users make these mistakes. A password generator eliminates most of them automatically — but understanding why they're dangerous helps you make better decisions overall.

Random password vs passphrase — which is better?

Both are strong if done correctly. The right choice depends on how the password will be used.

Password security checklist

Run through this checklist to assess your current password security posture. If you check all boxes, your accounts are well-protected against the vast majority of attacks.

Where to store your generated passwords

A strong password you can't remember is only useful if you store it securely. A dedicated password manager encrypts your vault locally, syncs across devices, and auto-fills logins — so you only need to remember one master password.

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Two-factor authentication — the essential companion to strong passwords

A strong, unique password protects you from password guessing and credential stuffing attacks. But if your password is exposed in a data breach — and breaches happen to even the most security-conscious services — your account is still vulnerable. Two-factor authentication (2FA) is the layer that protects you when your password alone is no longer enough.

2FA requires a second form of verification in addition to your password. The most common forms are SMS codes (convenient but vulnerable to SIM-swapping attacks), authenticator app codes (TOTP — time-based one-time passwords via Google Authenticator, Authy, or 1Password's built-in TOTP), and hardware security keys (FIDO2/WebAuthn — the most secure option, used by Google, Cloudflare, and government agencies). For important accounts, always use an authenticator app or hardware key rather than SMS.

The hierarchy of account security is: unique strong password + 2FA + secure email account. Your email is the master key — nearly every other account can be reset via email. Securing your email account with a strong generated password and hardware key 2FA is the single highest-impact security action most people can take.