Password Generator
Generate strong, cryptographically random passwords with custom length and character sets. Uses crypto.getRandomValues() for true randomness — all in your browser, nothing sent to a server.
Character Sets
How to Use the Password Generator
A strong password is generated automatically when the page loads. Adjust the options below to match your requirements, then click Generate Password or the refresh icon next to the output to create a new one.
Password Options Explained
Password Length (8–128)
Longer passwords are exponentially harder to crack. Use 16+ for personal accounts, 24+ for sensitive ones like email and banking.
Uppercase (A–Z)
Adds 26 uppercase letters to the character pool. Most password policies require at least one uppercase character.
Lowercase (a–z)
Adds 26 lowercase letters. Together with uppercase, this doubles the base character set and significantly improves entropy.
Numbers (0–9)
Adds 10 digits. Combined with letters, enables most password complexity requirements.
Symbols (!@#$...)
Adds special characters — the biggest single boost to password entropy. Enable whenever the service allows it.
Exclude Ambiguous Chars
Removes 0, O, l, and 1 to avoid visual confusion when you must type the password manually (e.g., on a TV or console).
Password Strength Levels
| Strength | Criteria | Use Case |
|---|---|---|
| Weak | Short length, limited character variety | Avoid — insecure for any real account |
| Fair | Moderate length or mixed case/numbers | Temporary accounts, low-risk services |
| Strong | 12+ chars with letters and numbers | Personal accounts, social media |
| Very Strong | 16+ chars, all character sets | Email, banking, work systems |
Bulk Password Generation
Need multiple passwords at once? Use the Bulk Generate feature to create 5, 10, or 20 passwords in a single click — all using the same settings as your single-password options. This is useful for:
- Provisioning multiple new user accounts
- Generating a set of API keys or secret tokens
- Creating a batch of test credentials for development
- Providing employees with initial login passwords
Password Security Best Practices
Use a password manager
Store generated passwords in a reputable password manager (Bitwarden, 1Password, Dashlane). Never reuse passwords across sites.
Enable 2FA everywhere
A strong password combined with two-factor authentication (TOTP app or hardware key) makes accounts nearly impossible to compromise.
Never share passwords
Passwords should never be sent via email, SMS, or chat. Use a secure sharing service like 1Password's share feature if absolutely necessary.
Rotate regularly
Change passwords for critical accounts every 90 days or immediately after a service announces a data breach.
Why crypto.getRandomValues()?
Most basic random number generators, including JavaScript's built-in Math.random(), are pseudo-random — they use deterministic algorithms that can theoretically be predicted. The Web Cryptography API's crypto.getRandomValues()sources entropy from the operating system's cryptographically secure random number generator (CSPRNG), the same source used by professional security software. This makes the output statistically unpredictable and safe for security-sensitive applications.
Frequently Asked Questions
How secure is the password generator?
The generator uses the Web Cryptography API (crypto.getRandomValues()) which provides cryptographically strong random values. This is the same standard used by security-critical applications and is far more secure than Math.random(). All generation happens in your browser — no passwords are transmitted to any server.
How long should my password be?
Security experts recommend at least 16 characters for personal accounts and 24+ for sensitive accounts like email, banking, and work systems. With a full character set (upper, lower, numbers, symbols), a 16-character password has approximately 2^100 possible combinations — effectively uncrackable by brute force.
Should I use symbols in my password?
Yes, whenever the site or service allows it. Adding symbols dramatically increases the password's entropy (randomness). A 12-character password with only lowercase letters has about 26^12 combinations, while adding symbols increases that to roughly 95^12 — over 300 billion times more combinations.
What are ambiguous characters and why exclude them?
Ambiguous characters are those that look similar in many fonts: the number zero (0) and the letter O, and the lowercase l and the number 1. Excluding them reduces the chance of misreading a password when you need to type it manually, such as when signing into a device you cannot paste into.
Is it safe to use a password generator online?
Yes — as long as the generator runs entirely client-side (in your browser), which this tool does. The password is generated using your device's local cryptographic functions and never leaves your browser. To verify, you can disconnect from the internet and the tool will still work perfectly.
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