Secure Password Generator – Create Strong Passwords Online
Strong random passwords, memorable passphrases and PINs, generated in your browser with cryptographic randomness. Nothing you generate is ever sent to a server.
- Never leaves your device
- Web Crypto randomness, no bias
- Real entropy, honestly measured
A PIN is only safe because the card, phone or lock limits wrong guesses. For anything an attacker could test offline, use a password or passphrase.
Generate several at once
Uses the settings above. Handy for setting up a batch of accounts or devices.
How this generator works
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Cryptographic randomness
Every character, word and digit is drawn with
crypto.getRandomValues, the same generator browsers use for encryption keys.Math.randomis never used. -
No modulo bias
Random numbers that would make some characters slightly more likely are thrown away and redrawn (rejection sampling), so every allowed character is exactly equally likely.
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Entropy you can check
The strength shown is the number of equally likely results your settings allow, in bits, not a guess from the look of the password. Crack times assume 10 billion guesses per second.
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Private by design
Generation happens entirely on this page. Passwords are never sent, logged or saved; only your option choices are remembered in this browser for next time.
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Best Strong Password Generator
If you're like most people, you use the same username and password for everything. What happens when one of those credential sets is compromised? How long will it take to sort out the damage done by a hacker who manages to get their hands on your login information?
Luckily, there are ways for you to keep your accounts safe, even if they are taken over by social engineering or brute force attacks. This post will show how to protect your accounts- all 16 of them- with just one master password.
What are the steps to generate a strong password?
The first step is always the hardest: choosing a new master password that's both difficult to crack and easy enough that you'll be able to remember it. (No, this isn't the time to write down your phone number, birthdate, Social Security number, and pet's name.)
Here are a few ideas for tough-but-not-too-tough passwords:
"Istanbul", "Alberta", "JSON", "Rex" or a chemical formula. If you're into that sort of thing. Or you can try something from the list of the top 10 longest passwords from last year.
In all cases, it's important to have at least one character from each category. In the case of the first example, for example, if you use "Istanbul", it can be either I or S or T or P or L. (If you use all of the same characters, the password is more easily guessed.)
The next step is to create a "salt" by adding random characters to the end of your password. These characters should be different each time, but they can be either numbers or letters. Using this method, you don't need to worry about having 16 random characters in total; NTLDR$1 will work just fine. (Credit for this idea goes out to Reddit users Celerity and SirDillpickle.)
Now that you have a tough-but-memorable master password and a random salt, it's time to convert your account usernames.
If you're running Windows, all you need to do is click on the Start button > All Programs > Accessories > Notepad. If you're on Mac or Linux, open up a text editor of your choice.
Copy your username from each account you want to protect, then paste it into the text box in Notepad one by one.
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Quick answer
Choose a length and character options, click Generate, and the tool creates a random password in your browser that you can copy with one click.
Key facts
- Runs entirely in your browser via JavaScript's random-number generation
- Supports customizable password length and character types (uppercase, lowercase, numbers, symbols)
- No file upload or server round-trip involved
- Generated passwords are not sent to or stored on the A2Z Tools server
- Free with no usage limit
What is this tool?
The password generator creates random passwords from the character sets you select — lowercase, uppercase, numbers and symbols — at the length you choose, directly in your browser.
How to use it
Set your desired password length, choose which character types to include, and click generate; copy the resulting password for use in your account.- Choose your desired password length.
- Select which character types to include (uppercase, lowercase, numbers, symbols).
- Click generate to create a new random password.
- Copy the password for use in your account.
Example
Example: generating a 16-character password with all character types enabled might produce something like "aK9$mP2!qR7&zN4#".How it works
The page uses JavaScript's random-number generation to select characters from your chosen character sets (uppercase, lowercase, numbers, symbols) up to your specified length, assembling them into a password entirely in your browser.Common use cases
- Creating a strong, unique password for a new account
- Replacing reused passwords after a breach notification
- Generating temporary credentials for testing
Benefits
Free, instant, and lets you customize password length and complexity to match a specific requirement.Limitations
A generated password is only as safe as where you store it — use a password manager rather than notes or spreadsheets, and never reuse the same password across sites.
Privacy & your data
Generation happens entirely in your browser using JavaScript. The password is never transmitted to, or stored on, our servers — nobody but you ever sees it.
Frequently asked questions
Can anyone see the password this tool generates?
No. The password is generated locally in your browser and is never sent over the network, so only you can see it.
Are generated passwords stored anywhere?
How long should a strong password be?
Current guidance recommends at least 12–16 characters mixing upper and lower case, digits and symbols — longer is stronger.
What makes a password 'strong'?
Should I use the same password on multiple sites?
No. Reuse means one leaked site exposes all your accounts. Generate a unique password per site and keep them in a password manager.
Can I customize which characters are included?
Is this tool free to use?
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