UUID / GUID Generator

About the Online UUID / GUID Generator

Our UUID Generator is a simple tool we built for creating universally unique identifiers (UUIDs), which are also known as globally unique identifiers (GUIDs). If you're a developer, tester, or database admin, you probably need these all the time. This tool lets you generate one or many UUIDs in different formats, right in your browser.

What Are UUIDs Used For?

A UUID is a 128-bit number used to uniquely identify information in computer systems. Because the total number of possible UUIDs is so massive, the chance of two UUIDs being the same is practically zero. This makes them super useful for:

• Database Keys: They make great primary keys for database tables, especially in distributed systems where you can't rely on auto-incrementing numbers.
• Unique Identifiers: You can use them to tag transactions, user sessions, or any object that needs a unique ID that won't clash with another.
• Testing: When you need unique data for your tests, you can generate a bunch of UUIDs in a snap.
• Software Development: They are used all over the place in software, from identifying components to creating unique file names.

How to Use Our Generator

We designed this tool to be quick and flexible. Here's how you can use it:

• Choose a quantity: Enter how many UUIDs you want to generate (you can create up to 1000 at once).
• Pick a separator: Decide how you want to separate multiple UUIDs. A new line is the default, but you can also use commas, spaces, and more.
• Customize the format: Use the toggles to make the UUIDs uppercase, remove the hyphens, or wrap them in braces {}.
• Click the "Generate UUIDs" button. The results will appear instantly in the text box.
• From there, you can easily "Copy" them to your clipboard or "Download" them as a text file.

Because your privacy is important to us, our tool generates UUIDs entirely on your computer. Nothing is ever sent to our servers.

Frequently Asked Questions

What is the difference between a UUID and a GUID?

Functionally, there is no difference. UUID (Universally Unique Identifier) is the standard defined by the Open Software Foundation (OSF), while GUID (Globally Unique Identifier) is Microsoft's implementation of that standard. The terms are often used interchangeably.

Are the UUIDs generated here truly unique?

The chance of this tool generating the same UUID twice is astronomically small, so for all practical purposes, yes. We use the browser's built-in `crypto.randomUUID()` function, which creates Version 4 UUIDs. These are based on random numbers, and the total number of possible combinations is over 3.4 x 10^38.

What version of UUID does this tool generate?

This tool generates Version 4 (v4) UUIDs. This is the most common version, and it is created using random or pseudo-random numbers.

Is it safe to use these generated UUIDs for my application?

Yes. The generation happens securely on your own computer using the web browser's standard cryptography API. The UUIDs are high-quality and suitable for any application, from database keys to unique identifiers in production systems.

Can I generate UUIDs in bulk?

Yes, you can. Just enter the number of UUIDs you need in the "Quantity" field (up to 1000 at a time) and click generate. You can then copy the entire list or download it as a text file.