Random String Generator
Create secure passwords, API keys, and validation tokens.
Generated Strings
Related Security Tools
Secure Passwords Made Simple
In today's digital world, reuse of passwords is the #1 security risk. The only way to stay safe is to use strong, unique, random passwords for every single account.
Our Random String Generator allows you to create cryptographically secure strings right in your browser. Whether you need a complex password, a secure salt for encryption, or a set of API keys for your application, this tool gives you complete control over length, complexity, and character sets.
Why Exclude Ambiguous Characters?
Have you ever tried to type a WiFi password and couldn't tell if it was a capital I or a lowercase l? Or a zero 0 versus the letter O?
Our "Exclude Ambiguous" feature solves this frustration. By removing these confusing characters, we generate strings that are unambiguous to read and type, which is critical for printed passwords or codes that need to be manually entered.
Client-Side Security
Many online generators create passwords on their server and send them to you over the internet. This creates a risk of interception or logging.
We do things differently. This tool relies on the window.crypto API built into your browser. The random numbers are generated by your own device's operating system, ensuring that no one else—not even us—can see the strings you generate.
Frequently Asked Questions
Is this generator secure?
Yes. Unlike basic random generators that use Math.random() (which is predictable), this tool uses the standard Web Crypto API (window.crypto.getRandomValues). This provides cryptographically strong entropy suitable for passwords and encryption keys.
Do you save my generated passwords?
No. Never. This tool runs 100% in your browser. The generated strings are created locally on your device and are never sent to our servers. You can even disconnect from the internet and the tool will still work.
What are 'Ambiguous Characters'?
Ambiguous characters are letters and numbers that look similar in many fonts, such as 1, l (lowercase L), I (uppercase i), 0 (zero), and O (uppercase o). Excluding them makes passwords easier to read and type manually.
How long should a password be?
For strong security, we recommend a minimum of 16 characters, mixing uppercase, lowercase, numbers, and symbols. A 12-character password can be brute-forced relatively quickly by modern hardware, while 16+ takes centuries.
Can I use this for API Keys?
Yes. Generating a 32-character or 64-character string with this tool is perfect for creating random API keys, session tokens, or unique identifiers for your database.
Why is Math.random() bad for security?
Math.random() is a Pseudo-Random Number Generator (PRNG). It is designed for speed, not security. If an attacker knows the algorithm's state (from a few previous numbers), they can predict future numbers. crypto.getRandomValues() is a CSPRNG designed to be unpredictable.