Create strong, secure passwords instantly
Our free Password Generator creates strong, cryptographically inspired random passwords based on your chosen criteria. A strong password is your first line of defense against unauthorized access to your online accounts, and this tool helps you generate passwords that are resistant to brute-force, dictionary, and hybrid attacks.
Each generated password includes an entropy estimate measured in bits — the higher the entropy, the more secure the password. As a rule of thumb, a password with 60+ bits of entropy is considered strong, while 80+ bits is very strong and suitable for protecting sensitive accounts like email, banking, and password managers.
1, l, I, 0, and O.A strong password has sufficient length (16+ characters), uses a mix of character types (uppercase, lowercase, numbers, symbols), and is completely random — meaning it contains no dictionary words, personal information, or predictable patterns. Entropy, measured in bits, quantifies this randomness.
Yes. A password manager securely stores all your unique passwords so you only need to remember one strong master password. This eliminates the common and dangerous habit of reusing passwords across multiple sites, which is one of the leading causes of account compromise.
Entropy = log₂(RL) where R is the size of the character set and L is the password length. For example, a 16-character password using all 95 printable ASCII characters has log₂(95¹⁶) ≈ 105 bits of entropy. Each additional character exponentially increases the difficulty of a brute-force attack.
Ambiguous characters are those that look similar and can be easily confused, especially in certain fonts. These include: the digit 1, lowercase l, uppercase I (all similar), and the digit 0 and uppercase O (also similar). Excluding them makes passwords easier to read and type manually.
The National Institute of Standards and Technology (NIST) now recommends changing passwords only when there is evidence of compromise, rather than on a fixed schedule. Focus on creating strong, unique passwords for every account and enabling two-factor authentication where available.