Password Generator
Cryptographically secure passwords, passphrases, and PINs — generated on your device.
Also known as: Random password maker, Strong password generator, Passphrase generator
How it works
- 1Pick a mode: Random characters, Memorable passphrase, or PIN.
- 2Adjust length and character options — the result updates instantly.
- 3Check the live strength meter, or turn on bulk mode to generate many at once.
- 4Copy your password, or download a bulk batch as a .txt file.
Why use Password Generator
True cryptographic randomness
Built on the Web Crypto API's CSPRNG with rejection sampling, not Math.random() — the same class of randomness source used for real cryptographic keys.
Guaranteed character coverage
If you select uppercase, numbers, and symbols, the result is verified to contain all three — not left to chance the way many generators leave it.
Three generation modes
Random characters for password managers, memorable passphrases for things you type often, and PINs for device unlocks.
Bulk generation with export
Generate up to 200 passwords at once and download them as a .txt file — built for provisioning multiple accounts.
Live strength feedback built in
Every generated result shows its real entropy in bits, calculated the same way as our Password Strength Checker.
Nothing ever stored or transmitted
Generation happens entirely on your device — no server call, no logging, no history saved anywhere.
Who uses Password Generator
Creating a new account password
Generate a strong, unique password instead of reusing one across multiple sites.
Setting a password manager's master password
Use Memorable mode to get a passphrase strong enough to protect a vault, but easy enough to type from memory.
Setting a device or app PIN
Generate a random numeric PIN for a phone lock screen, safe, or door code.
Provisioning multiple accounts at once
Use bulk mode to generate a batch of unique passwords for a team or a set of new accounts.
Replacing a reused or weak password
Swap out an old, guessable password for a freshly generated, genuinely random one.
Setting a Wi-Fi router password
Generate a long random password for your home network instead of leaving the router's default.
About Password Generator
Most online password generators are more fragile than they look. A surprising number are built on JavaScript's Math.random() — a fast, general-purpose random number generator that was never designed to be unpredictable in a security sense. It's fine for shuffling a playlist; it's not fine for generating something an attacker might try to predict. The correct tool for the job is a cryptographically secure pseudorandom number generator (CSPRNG), and every modern browser ships one built in: the Web Crypto API's crypto.getRandomValues().
This generator uses that API exclusively, combined with rejection sampling — a technique that discards results that would otherwise introduce a subtle bias toward certain characters. It also solves a second, quieter problem with naive generators: claiming a password "includes symbols" without actually guaranteeing one appears. This tool builds every password by first placing one random character from each character type you've selected, then filling the rest of the length randomly and shuffling the result — so if you ask for uppercase, numbers, and symbols, you're guaranteed to get all three, every time, not most of the time.
Three modes cover the situations people actually generate passwords for. Random mode is the classic approach — a configurable mix of uppercase, lowercase, numbers, and symbols — best for passwords you'll store in a password manager and never type by hand. Memorable mode generates a Diceware-style passphrase: several random words drawn from a large wordlist and joined together, which is dramatically easier for a human to type or remember than a random string while still carrying serious entropy, because the randomness comes from which words were picked, not from the letters within them. PIN mode generates a numeric-only code for situations like unlocking a phone or a safe, where the device itself limits how many guesses an attacker gets.
Every password, passphrase, and PIN this tool generates is created locally in your browser and handed straight to you — nothing is logged, cached, or sent anywhere, and there's a bulk mode for generating up to 200 at once (useful for provisioning several accounts) with a one-click .txt export.
Password Generator vs. other options
How Open Tools Library compares to desktop software and other online tools.
| Feature | Open Tools Library | Desktop software | Other online tools |
|---|---|---|---|
| Price | Free, unlimited | Often built into password managers | Often free |
| Randomness source | Web Crypto CSPRNG | OS-level CSPRNG, usually | Often Math.random() — not cryptographically secure |
| Guaranteed character coverage | Yes, verified every time | Varies | Rare, often unverified |
| Passphrase mode | Yes, real wordlist-based | Sometimes | Rare |
| Bulk generation | Up to 200, exportable | Rare | Rare |
| Data privacy | Never transmitted | Stays local | Sometimes generated server-side |
Pro tips
- Use Memorable mode for anything you'll type often or need to remember, like a password manager's master password.
- Use Random mode with all character types on for passwords you'll only ever copy-paste from a password manager.
- Turn on "exclude ambiguous characters" if you might ever need to type the password by hand or read it aloud.
- Length matters more than complexity for real-world strength — a longer password beats a shorter, more "complicated" one.
- Never reuse a generated password across multiple accounts, no matter how strong it is on its own.
- If you generate a batch in bulk mode, store and distribute the exported file securely, then delete it.
Technical specs
- Randomness source
- Web Crypto API (crypto.getRandomValues), rejection sampling
- Modes
- Random characters, Memorable passphrase, Numeric PIN
- Max length
- 64 characters (Random mode)
- Passphrase wordlist
- 700+ curated words
- Bulk generation
- Up to 200 at once, exportable as .txt
- Processing location
- 100% local, in your browser
Privacy & security
A password generator that quietly logs what it generates defeats the entire point of using one.
Every password is generated locally using your browser's cryptographic API — nothing is ever sent to a server.
No account, email, or login required to generate one password or two hundred.
Nothing is stored — refresh the page and every generated password is gone for good.
Works the same whether you're generating a throwaway PIN or a password manager's master passphrase.
Frequently asked questions
Is this actually cryptographically secure, or just "random"?
It uses crypto.getRandomValues(), the Web Crypto API's cryptographically secure random number generator, with rejection sampling to avoid bias — the same class of randomness source used to generate real cryptographic keys, not Math.random().
Is my generated password sent anywhere?
No. Every password is generated entirely in your browser and never transmitted, logged, or stored.
What's the difference between Random and Memorable mode?
Random mode mixes individual characters for maximum entropy per character — best for passwords you'll store in a manager. Memorable mode strings together whole random words, which is easier to type and remember while still being genuinely hard to guess.
How long should my password be?
Longer is generally better than more "complex": 16+ characters for Random mode, or 5-6 words for a passphrase, is a solid target for most accounts.
Can I generate multiple passwords at once?
Yes — turn on bulk mode, choose a count up to 200, and download the results as a .txt file.
Does turning off symbols make my password much weaker?
It reduces the character pool, which lowers entropy per character — but you can compensate by increasing the length. The strength meter shows the real effect live.
Is a PIN as secure as a password?
No — PINs are digits-only, so they carry far less entropy per character. They're fine for unlocking a device with limited attempts, not as a substitute for a real account password.
Troubleshooting
The password field is empty and nothing happens when I click regenerate
In Random mode, this means no character types are selected — turn on at least one of uppercase, lowercase, numbers, or symbols.
The password is hard to type or read aloud
Turn on "exclude ambiguous characters" to remove easily-confused characters like l, 1, I, O, and 0, or switch to Memorable mode for a passphrase instead.
My bulk download didn't start
Check that your browser allows downloads from this site — some browsers block automatic downloads until you approve them once.
Why does the strength meter show a different score each time, even at the same length?
Each password is generated fresh and independently, so the exact mix of characters — and therefore the precise entropy — varies slightly between generations, even with identical settings.
Related searches
Landed here looking for something worded a little differently? Password Generator covers all of these too:
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