Create strong, random passwords instantly
Our free password generator creates strong, random passwords that help protect your online accounts. Customize the length (8 to 128 characters) and character types — uppercase letters, lowercase letters, numbers, and special symbols — to match your security requirements. Every password is generated instantly in your browser and never sent to any server.
No. All passwords are generated entirely in your browser using JavaScript. Nothing is sent to our servers. We have no way of seeing, logging, or storing any password you generate here. Your passwords are completely private.
A strong password is long (16+ characters), random, and uses a mix of uppercase letters, lowercase letters, numbers, and special symbols. Avoid dictionary words, names, dates, or keyboard patterns like "qwerty123". A 16-character random password with all character types would take billions of years to crack with current technology.
Security experts recommend at least 16 characters for important accounts (email, banking, social media). For lower-risk accounts, 12 characters is generally acceptable. The longer the password, the more secure — our generator supports up to 128 characters.
Yes. Generated passwords work on any website or app. Some sites restrict special characters — if a site rejects your password, uncheck "Special Symbols" and generate a new one using only letters and numbers.
A password generator creates new random passwords. A password manager stores and autofills them. Use both together — generate a strong password here, then save it in a password manager so you don't have to remember it.
Password strength is primarily a function of entropy — the number of possible combinations an attacker would need to try to guess it by brute force. Entropy is calculated as: log₂(character_set_size^password_length). A password using only lowercase letters (26 characters) at 8 characters long has log₂(26⁸) ≈ 37.6 bits of entropy. Adding uppercase, numbers, and symbols expands the character set to roughly 94 characters, raising 8-character entropy to 52.4 bits — but a 16-character lowercase-only password reaches 75 bits, which is stronger. Length compounds faster than character set width.
Modern password crackers don't try random characters in sequence — they use wordlists, common substitutions (@ for a, 3 for e), and known leaked passwords first. This is why "P@ssw0rd" is weak despite meeting typical complexity rules: it matches a known pattern. Truly random passwords generated by a tool like this one don't follow any pattern and are immune to dictionary attacks.
A randomly generated 16+ character password is effectively impossible to memorise. The right solution is a password manager — an encrypted vault that stores all your passwords and autofills them. Bitwarden is open-source and free; 1Password and Dashlane are well-regarded paid options. All use end-to-end encryption, meaning even the provider cannot see your passwords.
The alternative — reusing a memorisable password across multiple sites — is the leading cause of account compromise. When any site you use suffers a data breach (and breaches happen constantly — Have I Been Pwned lists billions of compromised accounts), attackers automatically try the leaked credentials on other sites. Unique passwords per site mean a breach of one account cannot cascade into others.
Two-factor authentication (2FA) adds a layer beyond passwords. Even if someone obtains your password, they cannot log in without the second factor. Enable it on every account that supports it, particularly email (which controls password resets for everything else) and financial accounts.
Password strength comes down to the number of possible combinations an attacker must try. A 6-character lowercase-only password has about 309 million combinations — crackable in seconds by a modern GPU. A 16-character password mixing uppercase, lowercase, numbers, and symbols has approximately 10^30 combinations — far beyond any foreseeable brute-force capability.
Length adds far more security than character variety. A 16-character lowercase password is stronger than a 10-character password using all four character types. Adding one capital letter and one number to a short password (a common but misguided policy) provides much less protection than simply making it longer. This generator defaults to 16 characters — the point at which brute-force attacks become computationally infeasible even for well-resourced attackers.
Most breaches don't involve guessing individual passwords. The most common attack vectors are:
Data breaches: A site you use is hacked and its password database is stolen. If passwords were stored weakly (plaintext or unsalted MD5), attackers recover millions of passwords within hours. If you reuse passwords across sites, one breach exposes all your accounts — this is the strongest argument for unique passwords everywhere.
Credential stuffing: Attackers take leaked username/password pairs and automatically try them against other services. Even a strong password provides no protection if it's reused — this is purely about reuse, not complexity.
Phishing: Users are tricked into entering their password on a fake website. No complexity protects against phishing. Two-factor authentication does, because the attacker also needs your second factor in real time.
The core problem is that humans cannot remember dozens of unique, long, complex passwords — so they reuse passwords or use simple ones. Password managers solve this by generating and storing a unique strong password for every site, protected by a single master password you memorise.
Reputable options include Bitwarden (open-source, free), 1Password, Dashlane, and the built-in managers in Apple iCloud Keychain and Google Chrome. Your master password never leaves your device — the manager stores an encrypted vault only decryptable with your key. Even if the password manager company itself is breached, an attacker cannot read your vault without your master password.
Two-factor authentication (2FA) requires something you know (password) plus something you have (your phone) or something you are (biometric). Even if your password is stolen, an attacker cannot log in without the second factor. Enable 2FA on every account that offers it — especially email, banking, and accounts used to log in elsewhere (Google, Apple, Microsoft).
App-based authenticators (Google Authenticator, Authy, Microsoft Authenticator) are significantly more secure than SMS-based 2FA, which is vulnerable to SIM-swapping attacks. Hardware security keys (YubiKey) are the most secure option available.
All passwords are generated entirely in your browser using JavaScript's cryptographically secure random number generator (crypto.getRandomValues). Nothing is transmitted to or stored by Flux Media Systems. Your passwords are private.
Researched and maintained by Iulian, founder of Flux Media Systems. General information, not professional advice — about this site & our sources →