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UUID/GUID Generator

Generate random UUID v4 identifiers.

100% Client-Side Local Execution
Input Data
1
Transformed Result
1

What is UUID/GUID Generator?

This uuid generator creates random, standards-compliant identifiers in seconds, the kind developers use to label database rows, API records, and session tokens without ever worrying about two of them colliding. It builds version 4 UUIDs (the fully-random kind), so you get a fresh, unique string every time you click. It works as an online uuid generator with no sign-up and no software to install.

Technical Execution

The tool uses your browser's built-in cryptographically secure random number generator to fill in the 122 random bits a version 4 UUID requires, then sets the fixed version and variant bits so the result follows the official RFC 4122 format. Because the randomness comes from the browser's crypto API rather than a predictable counter, the odds of ever generating a duplicate are astronomically small.

Zero Data Storage Guarantee

Every UUID is generated locally in your browser tab and never sent to any server, so there's nothing to log or leak. You can generate as many as you like, even offline after the page loads, and close the tab without leaving a trace.

How to Use UUID/GUID Generator (Step-by-Step Guide)

  1. Open the UUID/GUID Generator page.
  2. Click "Generate" to create a new version 4 UUID.
  3. Click again to generate as many additional UUIDs as you need.
  4. Use the copy button to grab a UUID to your clipboard.
  5. Paste it directly into your code, database, or config file.

Frequently Asked Questions (FAQ)

Q: What's the difference between a UUID and a GUID?
A: They're effectively the same thing — GUID is Microsoft's name for the identifier format, while UUID is the more general, industry-standard term. This guid generator produces values that work interchangeably as either.
Q: Is a UUID v4 actually guaranteed to be unique?
A: Not mathematically guaranteed, but practically yes — with 122 random bits, you'd need to generate trillions of UUIDs before the chance of a collision became meaningful.
Q: Can I use this for production database IDs?
A: Yes, UUID v4 is commonly used as a primary key format in production systems specifically because it can be generated on any machine without coordinating with a central server.
Q: Does this work as a random uuid online tool without an account?
A: Yes, there's no sign-up, no API key, and no rate limit — just open the page and generate as many as you want.
Q: Can I use this on mobile?
A: Yes, the generator works the same on phones and tablets as it does on desktop browsers.
Q: Will the UUID look the same every time I generate one?
A: No, each one is freshly randomized, so you'll get a different 36-character string every click.
Q: Does it support other UUID versions like v1 or v5?
A: This tool focuses on version 4, the random variant that's by far the most commonly used for general-purpose unique identifiers.
Q: Is there a limit to how many UUIDs I can generate?
A: No, you can generate as many as you need in a single session with no throttling.
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