Password Generator
Create strong, random passwords with full control over length and characters — generated in your browser.
About the Password Generator
A weak or reused password is the single easiest way for an account to be broken into, yet most people still pick something memorable instead of something safe. The AlarmDaddy Password Generator builds strong, genuinely random passwords for you in a fraction of a second, entirely inside your browser — nothing you generate is ever sent to a server, logged, or stored anywhere.
When the page loads, a random password is created for you automatically, so you can copy one straight away. Want something different? Hit the refresh button for a fresh password any time. You stay in full control of how it's built: drag the length slider anywhere from 4 to 64 characters, and toggle which character types to include — lowercase letters, uppercase letters, numbers and symbols. Turn on "exclude look-alike characters" to drop easily confused glyphs like the letter O and the number 0, or lowercase l and the number 1, which is handy when a password has to be typed by hand or read aloud.
Need several options to choose from, or passwords for a batch of accounts? Switch the count to 5, 10 or 20 and the tool generates a whole list at once, each with its own one-click copy button. A live strength meter shows the estimated entropy in bits and rates each password from weak to excellent, so you can see at a glance whether your choices are strong enough.
Under the hood the generator uses the browser's cryptographically secure random number generator (the Web Crypto API), not the predictable Math.random, and it guarantees at least one character from every category you enable. The result is a password that is both random and valid against typical "must contain a number and a symbol" rules. Longer passwords with more character types are exponentially harder to crack — a 16-character password mixing all four types is effectively impossible to brute-force with today's hardware. Generate it, copy it, store it in your password manager, and never reuse it.
How to use this calculator
- 1A random password is generated automatically when the page loads — copy it, or read on to customise.
- 2Drag the length slider to set how many characters you want (12–16+ is recommended).
- 3Toggle the character types to include: lowercase, uppercase, numbers and symbols.
- 4Optionally exclude look-alike characters, or raise the count to generate several passwords at once.
- 5Press the refresh button for a new password, then copy it with one click.
The formula
Password strength is measured in bits of entropy: the number of characters multiplied by the base-2 logarithm of the size of the character pool you allow. More character types and greater length both increase the pool and the entropy, making the password harder to guess. Around 60 bits is fair, 80+ is strong, and 100+ is very strong. Characters are chosen using the browser's cryptographically secure random source with rejection sampling to avoid modulo bias, so every character is equally likely.