Password Generator

Create strong, cryptographically secure random passwords. Customize length and character types for your security needs.

What is Password Generator?

A Password Generator creates random, cryptographically secure passwords that are virtually impossible to guess or crack. The need for strong, unique passwords has never been more critical—data breach databases now contain billions of leaked username-password combinations, and attackers use credential stuffing attacks to automatically try these stolen credentials across thousands of websites. A password is only as strong as the randomness behind it and its length. Human-chosen passwords are notoriously predictable: they follow patterns, reuse words, and include birthdays or pet names that attackers can guess. A truly random password generated from a large character set eliminates all predictability. The security of a password is measured by its entropy—the number of bits of unpredictability. A 12-character password using uppercase, lowercase, numbers, and symbols has approximately 78 bits of entropy, which would take billions of years to brute-force with current technology. A 16-character password raises this to 104+ bits—essentially uncrackable. This generator uses the Web Crypto API's crypto.getRandomValues() function—the same cryptographic-grade randomness used in security-critical applications—to ensure each character is independently and uniformly random with no predictable patterns.

How to Use Password Generator

Use the length slider to set your desired password length from 8 to 128 characters. Longer passwords are exponentially stronger—16 characters provides excellent security for most purposes, and 24+ characters is recommended for master passwords and high-value accounts. Toggle the character type checkboxes to include or exclude uppercase letters (A–Z), lowercase letters (a–z), numbers (0–9), and symbols (!@#$%^&*). Including all four character types maximizes the character pool and therefore the entropy of each generated password. Click the Generate button (or press Enter) to produce a new random password. The strength indicator shows whether the password is Weak, Fair, Strong, or Very Strong based on length and character diversity. Generate multiple passwords at once using the count selector if you need a batch of passwords for seeding a test database or creating multiple accounts. Click Copy to copy the password to your clipboard instantly—the password is never stored and disappears when you close or refresh the page.

FAQ

How secure is the randomness used to generate passwords?

This generator uses the Web Crypto API's crypto.getRandomValues() function, which is the browser's cryptographically secure pseudorandom number generator (CSPRNG). It is seeded by the operating system's entropy source (hardware events, CPU timing variations, etc.), making it suitable for security-critical applications. This is the same randomness source used in cryptographic key generation—far more secure than Math.random(), which is not cryptographically safe.

What password length should I use for different accounts?

General recommendation: 12 characters minimum, 16 characters preferred for everyday accounts (email, social media, shopping). 20+ characters for financial accounts (banking, investment, payment processors). 24–32 characters for master passwords in password managers. Never use less than 8 characters for any account with personal information. Every additional character multiplies the time required to crack the password by the size of the character set used.

Should I always include symbols in my passwords?

Including symbols significantly increases password strength because they expand the character pool. However, some websites and systems restrict which symbols are allowed—they may reject passwords containing certain special characters. If a site refuses your password, try regenerating without symbols or with only basic symbols like !@#$. For maximum compatibility, a longer password with only letters and numbers is often more practical than a shorter one with all symbol types.

Is my generated password saved anywhere?

No. All password generation happens entirely in your browser using local JavaScript. Generated passwords are never transmitted to any server, never logged, and never stored in any database. The password exists only in your browser's memory and disappears permanently when you close or navigate away from the page. To keep your passwords, copy them immediately into a trusted password manager like Bitwarden, 1Password, or your browser's built-in password manager.

Why should I use a different password for every website?

Password reuse is the most dangerous security habit. When any website suffers a data breach, all accounts sharing that password become immediately compromised. Attackers use automated tools to try stolen credentials across thousands of websites within hours of a breach. Using unique passwords for every account ensures that a breach on one site cannot cascade to others. A password manager makes this practical by storing and auto-filling unique passwords for every site.