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Secure Password Generator — Free, No Sign-up

Generate strong, random passwords using your browser's built-in cryptographic API. Customize length and character sets, generate batches of five, and copy with one click. Nothing is ever sent to a server — works offline.

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16 characters

About this tool

This password generator creates strong, random passwords using your browser's Web Crypto API (crypto.getRandomValues), the same cryptographic foundation used by password managers. You control length (6–64 characters), character sets (uppercase, lowercase, numbers, symbols), and can exclude visually ambiguous characters. A real-time strength meter shows the entropy in bits so you know exactly how strong each password is. Nothing is sent to a server — passwords exist only in your browser and are gone when you leave.

How to use

  1. Choose your desired password length with the slider.
  2. Select which character types to include (uppercase, lowercase, numbers, symbols).
  3. A password is generated automatically with a strength rating in bits. Click the copy button to copy it.
  4. Click "Generate 5 passwords" to create a batch — each one can be copied individually.

When to use this tool

  • Creating a strong password for a new online account or service.
  • Generating a batch of temporary passwords for team members or test accounts.
  • Replacing weak or reused passwords across your accounts.
  • Producing a high-entropy password for encryption or secure storage.

Frequently asked questions

Are these passwords truly random?

Yes. The tool uses the Web Crypto API (crypto.getRandomValues), which is cryptographically secure and suitable for generating passwords.

Is my password sent to a server?

No. Passwords are generated entirely in your browser. Nothing is transmitted or stored. Once you leave the page, the passwords are gone.

How long should my password be?

At least 16 characters for general accounts, 20 or more for high-security accounts. This tool supports up to 64 characters.

Should I include symbols?

Yes, unless the service restricts special characters. Symbols significantly increase entropy, making the password harder to crack.

What does "Exclude ambiguous characters" do?

It removes characters that look alike (0/O, l/1/I) to avoid confusion when reading or typing manually. If you always copy-paste, leave this unchecked.

What does the strength meter measure?

It calculates entropy in bits based on length and character set size. 65+ bits is strong, 90+ bits is very strong.

Can I generate multiple passwords at once?

Yes. Click "Generate 5 passwords" to create a batch with the same settings. Each can be copied individually.

Is this tool free?

Yes, completely free with no sign-up required and no usage limits.

Generated locally using the browser's secure cryptographic API (crypto.getRandomValues) — no password is ever sent or stored on a server.