Password Generator — Free Online Tool
Use instantly, free, with no signup. Your files are processed locally and never uploaded.
By the AllFileBox Team · Last updated: 2026-06-22
Password Generator is a free online tool that creates strong, random passwords in your browser using your chosen length and character types, with everything generated locally and never transmitted.
What makes a password strong
Strength comes from length and unpredictability. A long password drawn from a large mix of character types has so many possible combinations that guessing it becomes impractical. Mixing uppercase, lowercase, numbers, and symbols across at least 12 to 16 characters is the practical baseline today, and longer is always better for accounts that matter.
Randomness matters
A password is only strong if it is truly random, because patterns and dictionary words are the first things attackers try. This generator uses the browser's cryptographically secure random source rather than a predictable formula, so each password is genuinely unpredictable. That is the difference between a password that resists attack and one that merely looks complex.
Use a unique password everywhere
Reusing one password means a single breach exposes every account that shares it. Generating a unique password for each service contains the damage of any leak. Because remembering dozens of random strings is impossible, pair this generator with a password manager that stores them, so you only memorize one strong master password.
Private and local
Password Generator runs entirely in your browser. Each password is created locally using secure randomness and is never uploaded, stored, or logged, so it exists only on your screen until you copy it. No server ever sees the password, and closing the tab clears it from memory.
How To Use Password Generator
- Open the Password Generator tool.
- Choose the password length you want.
- Select which character types to include.
- Generate the random password in your browser.
- Copy the password into your password manager.
Secure a new account
Secure a new account
Generate a long random password for a sign-up and save it straight into your password manager.
Replace a weak password
Create a strong unique string to replace a reused or guessable password on an important account.
Make a one-off secret
Produce a random value to use as an API key placeholder or a temporary shared secret.
| Length | Character mix | Strength |
|---|---|---|
| 8 characters | Letters only | Weak |
| 12 characters | Mixed types | Good |
| 16+ characters | Mixed types | Strong |
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Key Features Password Generator
Your Files Stay Private
All processing happens in your browser using WebAssembly. Your file is never sent to our servers. We have zero access to your files — guaranteed.