Password Generator
Generate strong, random passwords with customizable length and character types. All passwords are created locally in your browser.
How to Use
- Set your desired password length using the slider
- Select which character types to include (uppercase, lowercase, numbers, symbols)
- Click Generate to create a new password
- Click Copy to copy the password to your clipboard
Frequently Asked Questions
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Are the generated passwords secure?
Yes. Passwords are generated using the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random numbers. No passwords are sent to any server.
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What makes a strong password?
A strong password is at least 16 characters long and includes a mix of uppercase letters, lowercase letters, numbers, and special symbols.
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Is my password stored anywhere?
No. Passwords are generated entirely in your browser and are never transmitted or stored anywhere.
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What is the maximum password length?
You can generate passwords up to 128 characters long.
Why Password Strength Matters
The most common cause of account breaches is not sophisticated hacking — it's weak or reused passwords. A study by Google found that 65% of people reuse the same password across multiple sites. When one site suffers a data breach, attackers immediately try those credentials on every other major service. This attack, called credential stuffing, is automated and runs at massive scale.
The defense is simple but requires discipline: every account gets a unique, randomly generated password that is long enough to resist brute-force attacks.
What Makes a Password Strong?
Password strength comes down to entropy — the mathematical measure of unpredictability. The more entropy, the longer it takes an attacker to guess the password even with specialized hardware.
Length is the most important factor. Each additional character exponentially increases the number of possible combinations. A 12-character password with mixed character types has roughly 10^21 possible combinations. Doubling the length doesn't double the combinations — it squares them.
Character variety matters. A password using only lowercase letters draws from a pool of 26 characters. Add uppercase, numbers, and symbols and the pool grows to 94 characters. A 16-character password drawn from 94 characters is astronomically harder to crack than a 16-character lowercase-only password.
Randomness is critical. Human-chosen passwords are predictable. We gravitate toward dictionary words, keyboard patterns (qwerty, 123456), and personal information. True random generation eliminates these biases entirely.
How This Tool Generates Passwords
This tool uses the Web Crypto API — specifically crypto.getRandomValues() — which is the same cryptographically secure random number generator used by operating systems and security software. It is fundamentally different from Math.random(), which is a pseudo-random generator unsuitable for security purposes.
The generated password never touches a server. It is created in your browser, displayed to you, and that's it.
Best Practices
- Use a password manager (Bitwarden, 1Password, etc.) to store generated passwords — you only need to remember one master password.
- Enable two-factor authentication on all important accounts as a second layer of defense.
- Generate a minimum of 16 characters for sensitive accounts like email, banking, and social media.
- Never reuse passwords, even slightly modified versions.