Password Generator

Free online tool to generate secure passwords easily.

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How to Use

  • 1. Set your desired password length. (Recommended: 4-128, prefer 12+)
  • 2. Select character types to include (uppercase, lowercase, numbers, symbols)
  • 3. Click 'Generate' button to create a password.
  • 4. Click 'Copy' button to copy to clipboard.

What is a Secure Password?

A secure password has these characteristics: (1) At least 8 characters long, (2) Includes uppercase, lowercase, numbers, and special characters, (3) Doesn't contain dictionary words or personal information, (4) Random character combination without obvious patterns. Passwords generated by this tool meet all these security criteria.

Password Strength Levels

  • Very Weak: 4+ chars with 1-2 character types only
  • Weak: 3+ character types, less than 8 characters
  • Fair: 8-11 characters, 3-4 character types included
  • Good: 12-15 characters, all 4 character types included
  • Very Strong: 16+ characters, all 4 character types included

Password Management Tips

  • Use different passwords for different websites.
  • Change your passwords regularly every 3 months.
  • Use password management apps (e.g., LastPass, 1Password, Bitwarden).
  • Don't include personal information like birthdate, name, or phone number.
  • Never share or write down your passwords.
  • Passwords generated here are never stored on any server, keeping you safe.

※ Notice

  • Passwords are generated in your browser only and never stored on our servers.
  • History is stored only in your browser's local storage and may be cleared when you close the browser.
  • Keep generated passwords in a safe place and never share them.
  • Avoid very weak passwords. We recommend using strong passwords with at least 12 characters.

Frequently Asked Questions

What is the recommended password length?

Security experts recommend passwords of at least 12 characters, and 16+ characters for important accounts (banking, email, etc.). The longer the password, the exponentially greater its resistance to brute-force attacks. This tool can generate passwords up to 128 characters long.

Are special characters required?

Special characters are not mandatory, but they significantly increase password strength. Including all four character types — uppercase, lowercase, numbers, and special characters — can make cracking the same-length password hundreds of times harder. Some services require special characters as mandatory.

How does password generation work?

This tool uses JavaScript in your browser to randomly select characters from your chosen character set to generate a password. Generated passwords are never sent to any server and are processed entirely within your browser. Generation history is stored only in your browser's local storage, protecting your privacy.

How should I manage generated passwords?

We recommend storing generated passwords in a dedicated password manager app like LastPass, 1Password, or Bitwarden. Saving passwords in a notepad or email is a security risk. Also, use unique passwords for each service to avoid using the same password across multiple sites.

Guide to Creating Secure Passwords

Why Strong Passwords Matter

Cyber attackers can use automated tools to try millions of passwords per second. Simple passwords can be hacked in just seconds, leading to serious consequences like personal information leaks, financial damage, and identity theft. Randomly generated complex passwords are the most effective defense against such attacks.

Additional Tips to Strengthen Password Security

Enabling two-factor authentication (2FA) alongside strong password generation further enhances security. The habit of using different passwords for each account and changing them regularly is important. Be careful not to enter passwords through phishing sites or suspicious links, and never save passwords on public computers.

Password Strength Measurement Criteria

Password strength is determined by three factors: length, character diversity, and unpredictability. Passwords shorter than 8 characters can be cracked by modern computers within hours. In contrast, passwords of 16 or more characters mixing uppercase, lowercase, numbers, and special characters are extremely difficult to crack even in thousands of years. Use this tool's strength measurement feature to generate sufficiently secure passwords.

This calculator is provided for informational purposes only.

Results are estimates and may differ from actual amounts.

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