This is a client-side password generator built with Vue 3 and Vite. It allows users to create strong, customizable passwords based on best security practices.

• Password length between 12 and 64 characters
• Options to include:
  • Uppercase letters (A-Z)
  • Lowercase letters (a-z)
  • Numbers (0-9)
  • Special characters (!"#$%&'()*+,-./:;<=>?@[]^_{|}~`)
• Optional:
  • Start password with a letter
  • Exclude similar characters (i, l, 1, L, o, 0, O)
  • Disallow duplicate characters (⚠️ reduces entropy)
  • Avoid sequential characters (abc, 123)
• Multi-password generation
• Secure copy-to-clipboard
• Password strength indicator based on entropy

Entropy is the measure of unpredictability in a password. In simple terms, it tells you how hard it is for an attacker to guess or brute-force the password.

Entropy (in bits) can be approximated by: Entropy = log₂(N^L) = L × log₂(N) where:

• L = password length
• N = number of possible characters (character set size)

Example:
If you allow all 95 printable ASCII characters and choose a 16-character password: That's a very strong password.
An attacker trying to brute-force that would need to try 95^16 combinations — computationally infeasible.

• Enforcing "no duplicate characters"
• Excluding entire character sets (e.g., no numbers or no special symbols)
• Reducing password length
• Forcing certain patterns (like starting with a letter)

These restrictions make the password more predictable, so they should be used only for usability or system compatibility reasons.

• All passwords are generated entirely on the client side.
• We use window.crypto.getRandomValues, which is part of the Web Cryptography API. It provides cryptographically secure random numbers.

Because Math.random() is not secure. It's deterministic and predictable.
Instead, crypto.getRandomValues uses the operating system's secure random source.

const array = new Uint32Array(1);
window.crypto.getRandomValues(array);

This ensures high entropy and randomness, essential for secure password generation.

📦 Tech Stack • Vue.js 3 • Vite • TypeScript • Tailwind CSS

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📈 Future Features • Entropy bar / strength meter • CSV export with optional client-side encryption • Save config presets locally • Support for passphrases (dice ware mode)

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⚖️ License

MIT — feel free to use, fork, or contribute.

This project was built with privacy and cryptography in mind.

pnpm install

pnpm dev

pnpm build

pnpm test:unit

pnpm lint