What is a UUID Generator?

A UUID Generator is a tool that creates a Universally Unique Identifier (UUID), which is a 128-bit number used to identify information in computer systems. Our tool specifically generates version 4 UUIDs, which are created using random numbers. The result is a 36-character string (including hyphens) like `f47ac10b-58cc-4372-a567-0e02b2c3d479` that is, for all practical purposes, unique in the universe.

What Problem Does This Tool Solve?

In software development, there is a constant need for unique identifiers. When you create a new user in a database, a new transaction, or a new session, you need an ID that will never, ever conflict with another. Trying to create these IDs manually (e.g., by just incrementing a number) can be problematic in large, distributed systems. UUIDs solve this problem by providing a standardized method for creating IDs that are statistically guaranteed to be unique, without needing a central authority to manage them. This tool gives developers a quick and easy way to generate these IDs on the fly for testing, development, or data creation.

How to Use Our UUID Generator?

1. Visit the Page: The tool will automatically generate a new UUID for you when the page loads.
2. Generate More: Click the "Generate New UUID" button to create a new, unique ID.
3. Copy: Click the copy icon next to the UUID to copy it to your clipboard.

Frequently Asked Questions (FAQ)

1. What does "version 4" UUID mean?

There are different versions of UUIDs based on how they are generated. Version 4 UUIDs are generated from random numbers, making them the most common and straightforward type. Other versions might use timestamps or MAC addresses.

2. Is it possible to get a duplicate UUID?

Theoretically, yes, but the probability is astronomically low. The total number of possible UUIDs is over 5 undecillion. You would need to generate one billion UUIDs per second for about 85 years to have a 50% chance of just one collision. For all practical purposes, they are unique.

3. Is this tool secure?

Yes. Our tool uses the browser's built-in `crypto.randomUUID()` function, which is a cryptographically secure random number generator. The generation happens entirely on your device.