How does this password generator create secure passwords?

This password generator uses the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure random values. Unlike Math.random() which is predictable, crypto.getRandomValues generates truly random numbers suitable for security-sensitive applications. All generation happens locally in your browser - no passwords are transmitted over the internet.

How long should my password be?

For maximum security, passwords should be at least 16 characters long. Each additional character exponentially increases the time required to crack the password. A 12-character password with mixed characters can take centuries to crack, while a 20+ character password is virtually unbreakable with current technology. Our tool allows you to generate passwords up to 128 characters.

Is it safe to use an online password generator?

Yes, when using a client-side password generator like ours. Our tool generates passwords entirely in your browser using JavaScript. No passwords are sent to any server or stored anywhere. You can verify this by using the tool while offline - it will still work because all processing happens locally on your device.

What is password entropy and why does it matter?

Password entropy measures the randomness and unpredictability of a password, expressed in bits. Higher entropy means a stronger password. A password with 80+ bits of entropy is considered very strong. Our generator calculates and displays the entropy of generated passwords so you can make informed decisions about password strength for different security requirements.

Should I use a passphrase instead of a password?

Passphrases (multiple random words combined) can be both secure and memorable. A 4-5 word passphrase provides excellent security while being easier to remember than random characters. However, for maximum security in automated systems, random character passwords are preferred. Our tool supports both approaches, allowing you to generate either type based on your needs.

How often should I change my passwords?

Modern security guidance suggests changing passwords only when there's a reason to believe they may be compromised, rather than on a fixed schedule. However, you should use unique passwords for each account and enable two-factor authentication wherever possible. Using a password manager along with our generator helps maintain unique, strong passwords for all your accounts.

Why should I avoid using personal information in passwords?

Personal information like birthdays, names, or common words can be easily guessed through social engineering or found in data breaches. Attackers use sophisticated dictionaries and personal data mining to crack passwords containing such information. Our random password generator creates passwords with no patterns or personal data, making them immune to these attack vectors.

password

Password Generator

Generate cryptographically secure passwords with customizable options. Features include strength indicator, entropy calculation, and estimated crack time for complete security transparency.

Generated Password

CL92_KeGHPxW51mn

Password StrengthStrong

Time to crack: Millions of years

Options

Length16

4163264

Generatepassword(s)

Uppercase (A-Z)ABC

Lowercase (a-z)abc

Numbers (0-9)123

Symbols (!@#$)!@#

Exclusions

Exclude ambiguous: { } [ ] ( ) / \ ' " `Exclude similar: i, l, 1, L, o, 0, O

Security Note

Passwords are generated entirely in your browser using the Web Crypto API. Nothing is sent to any server. Use a password manager to store your passwords securely.

How to Use This Password Generator

Set Password Length

Choose your desired password length using the slider. Longer passwords provide stronger security. We recommend at least 16 characters for sensitive accounts.

Select Character Types

Toggle the character sets you want to include: uppercase letters, lowercase letters, numbers, and special symbols. More variety means stronger passwords.

Generate and Copy

Click generate to create a new password. Review the strength indicator and crack time estimate, then copy to clipboard for immediate use.

Password Security FAQ

A strong password typically has at least 12-16 characters and includes a mix of uppercase letters, lowercase letters, numbers, and special symbols. The randomness and length are the most important factors. Our password generator uses cryptographically secure random number generation to ensure maximum unpredictability, making passwords resistant to brute-force attacks.

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About This Password Generator

Our free online password generator creates strong, random passwords using cryptographically secure algorithms. Unlike simple random number generators, this tool uses the Web Crypto API to ensure true randomness suitable for security-critical applications. Whether you need a complex password for banking, email, or any online account, this tool helps you create uncrackable passwords in seconds.

All password generation happens entirely in your browser. No passwords are ever transmitted, stored, or logged. This client-side approach ensures your generated passwords remain completely private and secure. Use this tool with confidence knowing your password security starts with truly random generation.