Free Online Random Password Generator
Create secure, random passwords with customizable length, uppercase, symbols, and exclusions. This free, browser-based tool is 100% client-side and privacy-first. No data leaves your browser, and no signup is required.
How to Use the Password Generator
Creating a strong, secure password takes only a few seconds. Follow these steps. For a deeper dive into password security, read our complete guide on how to create a secure password in 2024.
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Set the Length: Use the slider to select your desired password length. We highly recommend a minimum of 12-16 characters for optimal security.
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Choose Character Types: Check the boxes to include lowercase letters, uppercase letters, numbers, and symbols. The more types you include, the stronger the password.
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Apply Exclusions (Optional): If you need to avoid confusing characters (like l, 1, I, O, 0), check "Exclude Ambiguous". You can also choose to exclude brackets or prevent characters from repeating. If you need unique digits instead of characters, try our random number generator no repeats.
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Generate: Click the "Generate Password" button. Your new password will appear in the box on the right.
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Copy & Use: Review the password strength and entropy score. If you are happy with it, click the "Copy" button to copy it to your clipboard and paste it into your password manager or account settings.
How to Create a Secure Password
A strong password is your first line of defense against unauthorized access. Follow these best practices:
- Use Length: Aim for at least 12-16 characters. Longer passwords are exponentially harder to crack.
- Mix Characters: Combine uppercase letters, lowercase letters, numbers, and symbols.
- Avoid Personal Info: Never use birthdays, names of pets, or easily identifiable information.
- Uniqueness: Use a different password for every single account. If one is breached, the others remain safe.
- Avoid Common Words: Dictionary attacks can easily guess words. Random strings are best.
Understanding Password Entropy
Password entropy is a measure of how unpredictable a password is, expressed in bits. The higher the entropy, the harder it is for a computer to guess the password through brute force.
It is calculated roughly as: Entropy = Length × log2(Pool Size). If you need to compute complex logarithms for your own calculations, you can use our scientific calculator.
| Entropy Level | Security Status |
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| Low Entropy (< 40 bits) | Very vulnerable. Can be cracked almost instantly. |
| Medium Entropy (40-60 bits) | Vulnerable to modern hardware attacks within days or weeks. |
| High Entropy (60-80 bits) | Generally safe from casual attacks, but vulnerable to dedicated botnets. |
| Very High Entropy (> 80 bits) | Considered secure against current brute-force capabilities for the foreseeable future. |
How to Protect Your Password
Creating a strong password is just step one. Protecting it is equally important:
- Use a Password Manager: Tools like Bitwarden or 1Password allow you to remember only one master password while generating and storing complex, unique passwords for all other sites. Learn more in our ultimate guide to password managers.
- Enable Multi-Factor Authentication (MFA): Even if a hacker gets your password, they cannot access your account without the second factor (like a code on your phone).
- Recognize Phishing: Never enter your password on a site you arrived at via a suspicious link. Always check the URL.
- Update Public WiFi Habits: Avoid entering sensitive passwords when connected to public Wi-Fi networks without a VPN.
Frequently Asked Questions (FAQ)
Is it safe to use passwords generated by this tool?
Yes. This password generator is 100% client-side. The passwords are generated locally using your browser's built-in cryptographic random number generator. The generated password never leaves your device or gets sent over the internet.
What is password entropy?
Entropy is a measurement of how unpredictable a password is, measured in bits. The higher the entropy, the more difficult it is for a computer to crack the password using brute force. A password with 80+ bits of entropy is considered highly secure against modern hacking attempts. To learn more, read our secure password guide.
How long should my password be?
We recommend a minimum length of 12 to 16 characters. As a general rule, every additional character you add to a password exponentially increases the time it takes for a hacker to guess it. A 16-character password with symbols and numbers is practically impossible to crack.
What does "Exclude Ambiguous" mean?
Some characters look very similar to each other, such as the uppercase letter "I", the lowercase letter "l", and the number "1", or the letter "O" and the number "0". Checking this box removes these characters from the generator so you don't have to guess which one it is when reading or typing your password.
Why should I use a random generator instead of making up my own password?
Humans are notoriously bad at creating truly random sequences. We tend to rely on patterns, dictionary words, dates, or common substitutions (like replacing "e" with "3"). Hackers know this and program their tools to check for these human patterns first. A random generator eliminates these patterns.
Should I use the same password for multiple accounts?
Never. If one website suffers a data breach and your password is leaked, hackers will try that exact same password on your email, banking, and social media accounts. Always use a unique, randomly generated password for every single account, and use a reputable Password Manager to keep track of them.