Generate strong, random passwords with customizable length and character types. All generation happens in your browser.
This generator uses your browser's built-in cryptographic random number generator (crypto.getRandomValues) to create truly random passwords. No passwords are sent to any server -- everything runs locally in your browser. Select your desired length and character types, then click Generate or adjust the slider to create a new password instantly.
The strength meter evaluates your password based on length and character diversity. Longer passwords with more character types are exponentially harder to crack.
Password security is one of the most critical aspects of online safety. Data breaches expose billions of credentials every year, and weak passwords remain the primary vulnerability. According to security research, the most common passwords are still "123456", "password", "qwerty", and simple variations of these. Hackers use automated tools that can attempt billions of password combinations per second, making short or predictable passwords virtually useless.
A brute-force attack against a password tries every possible combination until it finds the right one. A 6-character password using only lowercase letters has 26^6 = 308 million combinations -- a modern GPU can crack this in seconds. Increase to 12 characters with uppercase, lowercase, numbers, and symbols (95 possible characters), and you get 95^12 = 5.4 x 10^23 combinations. At one trillion guesses per second, this would take over 17,000 years to crack. Length is the single most important factor in password security.
Beyond brute force, attackers use dictionary attacks (trying common words and phrases), credential stuffing (using passwords leaked from other sites), and social engineering (guessing based on personal information like birthdays, pet names, or favorite teams). A randomly generated password defeats all of these attack vectors because it has no pattern, no meaning, and no connection to the user's personal life. This is why security experts universally recommend using a password generator rather than creating passwords yourself.
| Length | Lowercase only | Mixed case + numbers | All character types |
|---|---|---|---|
| 6 | Instant | Seconds | Minutes |
| 8 | Minutes | Hours | Days |
| 12 | Weeks | Centuries | Millennia |
| 16 | Millennia | Trillions of years | Heat death of universe |
| 20+ | Practically uncrackable | Practically uncrackable | Practically uncrackable |
*Estimated time to crack with modern hardware performing 1 trillion guesses per second.
Use a unique password for every account. If one service gets breached, your other accounts remain safe. Password reuse is the number one reason breaches cascade into identity theft and financial loss. A password manager makes this practical by storing hundreds of unique passwords behind a single master password.
Enable two-factor authentication (2FA) wherever possible. Even the strongest password cannot protect against phishing attacks where you unknowingly enter your credentials on a fake website. 2FA adds a second layer -- usually a code from an authenticator app or a hardware key -- that an attacker cannot replicate even if they have your password.
Aim for at least 16 characters. While most services require only 8 characters, security researchers recommend 16 or more for important accounts. The exponential increase in cracking time makes every additional character enormously valuable. With a 16-character password using all character types, even the most powerful computing clusters on Earth could not crack it within any practical timeframe.
Never share passwords or write them on sticky notes. Use a reputable password manager like 1Password, Bitwarden, or KeePass. These tools encrypt your password vault with strong encryption and can auto-fill credentials, making both security and convenience achievable at the same time.
Yes. All passwords are generated entirely in your browser using the Web Crypto API. No passwords are transmitted to any server or stored anywhere. You can verify this by disconnecting from the internet and using the tool offline.
For important accounts (email, banking, social media), use at least 16 characters. For less critical accounts, 12 characters is a reasonable minimum. The longer the password, the more secure it is.
Yes, including symbols significantly increases the number of possible combinations. However, length matters more than complexity. A 20-character lowercase-only password is stronger than an 8-character password with symbols.
NIST (National Institute of Standards and Technology) no longer recommends regular password changes unless there is evidence of a breach. Frequent forced changes lead people to choose weaker, more predictable passwords. Instead, use strong unique passwords and change them only when compromised.
A strong password is long (12+ characters), random (not based on words or personal info), unique (not reused across sites), and uses a mix of character types. Randomly generated passwords are the strongest because they have no exploitable patterns.