Password Generator

What is the Password Generator?

This password generator creates strong, unpredictable passwords for you in seconds, right inside your browser. Instead of reusing the same memorable phrase across every account, you pick how long and how complex you want the password to be, and the tool builds a fresh random string from the character sets you choose. Because the work happens locally on your device, the password you get is never typed into a search box that is logged, never sent across the internet, and never saved on our side — it simply appears, ready for you to copy.

How to use it

1. Drag the length slider to the number of characters you want (16 or more is a good default for important accounts).
2. Select the character classes a destination site requires. Every generated candidate will contain at least one character from each selected class.
3. Optionally turn on Exclude look-alike characters to drop confusing pairs like O/0 and I/l/1 if you will type the password by hand.
4. Choose New password to apply changed settings, then read the strength indicator and tap Copy.
5. Need several at once? Set the batch count, choose Generate batch, copy the one you want, and save it before leaving.

That is the whole flow — pick, generate, copy, and you are gone. No account, no email, no waiting.

The method behind it

Randomness is the entire point of a good password, so the quality of the random source matters more than anything else. This tool uses the browser's Web Crypto API — specifically crypto.getRandomValues() — which is a cryptographically secure pseudo-random number generator (CSPRNG) built into every modern browser. Unlike Math.random(), which many quick scripts use and whose output can be predicted from earlier values, a CSPRNG is designed so that seeing past output gives an attacker no useful way to guess the next character.

The generator builds a character pool from the sets you enabled, then draws a complete candidate uniformly from that pool. It rejects and redraws any candidate that misses one of the selected classes. This means an enabled uppercase, lowercase, number, or symbol option is a real guarantee rather than merely permission for that class to appear. Rejection sampling also avoids fixed character positions and keeps every password that satisfies the rules equally likely. Byte-level rejection removes the smaller modulo bias that a naive random-number mapping would introduce. Every password is generated on your own device and never sent across the network.

The entropy display uses the exact number of strings that satisfy all the selected requirements. It calculates that valid space with inclusion-exclusion instead of multiplying the pool size by the length and pretending every unconstrained string is allowed. Character rules make a password compatible with sites that still demand them; they do not replace length, which remains the primary strength factor.

Examples

• A 16-character password with all sets on: something like q7$Rm2!vXp9Wd#Lk — high entropy, ideal stored in a password manager.
• A 20-character password with look-alikes excluded: something like Hk3rT8wYxQ4mPzAv6njB — long and strong, but easy to copy or read aloud without confusing 0 and O.
• A short 6-digit numbers-only PIN: something like 408137 — for a device lock screen or a simple code where only digits are allowed.

Your output will be different every time, because each click draws fresh secure randomness.

Common use cases

• Creating a brand-new account and wanting a unique password instead of recycling an old one.
• Rotating a password after a data-breach notification.
• Developers and IT staff generating service credentials, database passwords, or API secrets quickly.
• Setting up a router, Wi-Fi network, or shared device where you want a strong code that is still typeable.
• Anyone who simply does not want to type a password into a website that might store it.

Why use this one

The biggest difference is trust: the password never leaves your browser. There is no server round-trip, no logging, and no history — so even we cannot see what you generated. On top of that, it uses cryptographically secure randomness rather than the weak Math.random() behind many throwaway generators, gives you precise control with a length slider and guaranteed per-class requirements, offers a look-alike exclusion option for human-typed passwords, and lets you generate in batches without silently replacing an uncopied candidate when you adjust a setting. Changed settings are marked as pending until you explicitly generate again, and copy feedback reminds you that the page keeps no recoverable history. No sign-up, no character cap, no nagging.

It is part of a small, focused set of generators. If you need numbers instead of a password, the Random Number Generator draws random integers in any range. If you need stable identifiers, the UUID Generator creates RFC-compliant UUIDs. And when you just need to check a string against a length limit, the Character Counter counts characters with and without spaces.

Frequently asked questions