What is a Password Generator?
A password generator is a tool that automatically creates random, strong passwords using a combination of letters, numbers, and symbols. Using a password generator is far safer than creating passwords yourself because humans tend to use predictable patterns — names, birthdays, common words — that hackers can crack within seconds using automated tools.
Our free password generator uses the browser's built-in crypto.getRandomValues() API, which provides cryptographically secure randomness — the same standard used in professional security applications. All passwords are generated entirely in your browser and never leave your device.
What Makes a Strong Password?
- Length: Each additional character exponentially increases security. A 16-character password is vastly stronger than an 8-character one. Aim for at least 12–16 characters for most accounts, 20+ for critical accounts.
- Character Variety: Using uppercase letters, lowercase letters, numbers, AND symbols creates a much larger "keyspace" — the total number of possible passwords — making brute-force attacks practically impossible.
- Randomness: Truly random passwords with no dictionary words, names, or predictable patterns are significantly harder to crack than "clever" passwords like "P@ssw0rd123".
- Uniqueness: Never reuse passwords across different websites. If one site is breached, all your other accounts remain safe.
Password Entropy — Understanding Strength
- Below 28 bits: Very Weak — crackable almost instantly
- 28–35 bits: Weak — crackable within hours by modern hardware
- 36–59 bits: Moderate — takes days to months to crack
- 60–79 bits: Strong — would take years with current technology
- 80+ bits: Very Strong — practically uncrackable with foreseeable technology
A 16-character password using all character types generates approximately 105 bits of entropy — classified as Very Strong.
Best Practices for Password Security
- Use a different password for every website and application
- Store passwords in a reputable password manager (Bitwarden, 1Password, KeePass)
- Enable two-factor authentication (2FA) on all important accounts
- Never share passwords via email, chat, or text message
- Change passwords immediately if you suspect a breach
- Check if your email has been in known data breaches at haveibeenpwned.com
- Avoid using personal information (name, birthday, pet name) in passwords
Frequently Asked Questions
Are the passwords generated by this tool truly random?+
Yes. Our generator uses the Web Cryptography API's crypto.getRandomValues() function, which provides cryptographically secure pseudorandom numbers (CSPRNG). This is the same standard used in SSL/TLS encryption, digital signatures, and other security-critical applications. It is vastly more random than Math.random().
Do you store or log the passwords I generate?+
Absolutely not. All password generation happens entirely within your browser using JavaScript. No data is ever sent to our servers, and we have no way of seeing what passwords are generated. Each time you close the page, the passwords are gone permanently.
How long should my password be?+
For general online accounts (email, social media, shopping), 12–16 characters is excellent. For banking and financial accounts, use 16–20 characters. For encryption keys or highly sensitive systems, use 20–32+ characters. With a password manager storing your passwords, there is no reason not to use the maximum length supported by a site.
Should I include symbols in my password?+
Yes, whenever the site allows it. Adding symbols dramatically increases the keyspace and entropy. However, some older systems do not accept certain symbols. If a site rejects your password, try enabling only standard symbols like !@#$% and disabling more unusual ones.
What does "exclude similar characters" do?+
This option removes visually similar characters like the letter O and number 0, the letter l and number 1, and the letter I. This helps prevent confusion when reading or typing passwords manually. It slightly reduces entropy but makes passwords much easier to read and transcribe.
How do I remember strong passwords?+
You should not try to memorize randomly generated passwords — that defeats their purpose. Instead, use a password manager application. Free, open-source options like Bitwarden allow you to store unlimited passwords securely across all devices. You only need to remember one master password to access all others.