Free Strong Password Generator
Generate strong, random passwords right in your browser. Choose the length and character sets — every password is created on your device with cryptographic randomness and never leaves it.
—Passwords are generated on your device with crypto-grade randomness — nothing is sent or stored.
How to Generate a Strong Password
Set the length
Drag the slider to choose how many characters — 16 or more is recommended for accounts that matter.
Choose character types
Toggle uppercase, lowercase, numbers, and symbols. More variety means a larger character pool and a stronger password.
Copy your password
A new password is generated instantly. Copy it with one click, or regenerate until you get one you like.
Everything You Need in a Password Generator
A trustworthy password generator must be genuinely random, flexible, and private. Here's how this one delivers.
Cryptographically secure
Passwords use the browser's crypto.getRandomValues — the same secure randomness used for keys — with unbiased sampling, not the predictable Math.random.
Full control
Set any length from 6 to 64 and mix uppercase, lowercase, numbers, and symbols to match each site's requirements.
Live strength estimate
A strength label based on entropy updates as you change the length and character sets, so you can see when a password is strong enough.
100% private
Generation happens entirely on your device. No password is ever sent over the network, logged, or stored — you can even go offline.
When to Use a Password Generator
Reused and guessable passwords are the leading cause of account breaches. A generator fixes that in seconds.
New account sign-ups
Create a unique, strong password for every new service instead of reusing one you'll forget you reused.
Rotating a leaked password
After a breach notification, generate a fresh, unrelated password to replace the compromised one.
Filling a password manager
Generate a random password here and save it in your manager — the manager remembers it so you don't have to.
Wi-Fi keys and app secrets
Produce a long random string for a router password, database credential, or API secret.
Generate Passwords Without Trusting a Server
Some online generators create passwords on their servers — the one place a password should never be created. Local generation removes that risk entirely.
In-browser with SupaTools
- Passwords are generated on your device, never transmitted
- Cryptographically secure randomness, unbiased
- Control length and every character set
- Free with no sign-up, no logging, no ads
Server-side generators
- Your password may be created on someone else's machine
- Unclear whether generated values are logged
- Often weak randomness or limited options
- Ads and trackers on the page
Pro Tips for Strong Passwords
Length beats complexity
A longer password is exponentially harder to crack than a short one with more symbols. Favor 16+ characters wherever the site allows it.
Never reuse passwords
A unique password per site means one breach can't unlock your other accounts. Pair this generator with a password manager to keep them all.
Turn on symbols where allowed
Adding symbols widens the character pool and raises entropy. Disable them only when a site rejects special characters.
Password Generator — Frequently Asked Questions
Generate a Strong Password Free — No Sign-Up
Set your length and character sets above and copy a secure password instantly. It's created on your device and never leaves it.