Alphanumeric Password Generator
Generate secure random passwords using uppercase, lowercase, and numeric characters. Adjust the length and character sets, then copy your password.
Select at least one character typeRecommended Settings
Pro Tips
- •This tool uses your browser's cryptographically secure random number generator (crypto.getRandomValues), not a predictable pseudo-random function
- •Longer passwords are exponentially harder to crack - 16 characters or more is recommended for most accounts
- •Alphanumeric-only passwords avoid symbols for systems that don't accept special characters, though adding symbols further increases security when allowed
- •Each password is generated independently - regenerating gives you a completely new, unrelated password rather than a variation
Most Popular
Most users generate 16-character passwords with all three character types enabled
When to Use This Tool
Generate a strong, random password for a new online account.
Create a temporary password for a new user or system that will be changed on first login.
Generate credentials for systems or scripts that require alphanumeric-only passwords.
Generate a new random password to store in a password manager.
How It Works
Build a character set from the selected options (uppercase, lowercase, digits)
Use the browser's cryptographically secure random number generator to pick random characters from that set
Repeat until the password reaches the selected length
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by Web Crypto API (crypto.getRandomValues) for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
Is this password generator secure?
Yes. It uses the Web Crypto API's crypto.getRandomValues function, which is designed for cryptographic use and is not predictable like Math.random(), which many simpler generators mistakenly rely on.
Why doesn't this include symbols?
This tool is specifically for alphanumeric-only passwords, useful for systems that reject special characters. If you want symbols included, look for a general password generator that supports them.
Is my password sent to a server?
No. The password is generated entirely locally in your browser using JavaScript. It's never transmitted anywhere, including to this website's own servers.
How long should my password be?
Most security guidance recommends at least 12-16 characters for important accounts. Longer passwords are exponentially harder to guess or brute-force.
Should I reuse this password across multiple sites?
No. Use a unique password for every account, ideally stored in a password manager, so that a breach on one site doesn't compromise your other accounts.