About the UUID Generator

The UUID Generator creates universally unique identifiers (UUIDs) that can be used in software development, databases, APIs, and distributed systems. Generate one or multiple UUIDs instantly, then copy them directly into your project.

UUIDs are designed to be unique across systems, making them ideal for identifying records, users, transactions, files, sessions, and other data without relying on sequential numbering.

All UUIDs are generated locally in your browser for fast performance and added privacy.

What Is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value represented as a series of hexadecimal characters separated by hyphens.

A typical UUID looks like this:

Example

550e8400-e29b-41d4-a716-446655440000

Because UUIDs are generated using standard algorithms, the chance of two independently generated UUIDs being identical is extremely small. This makes them well suited for applications where unique identifiers are important.

How To Use the UUID Generator

Choose how many UUIDs you want to generate.
Select the UUID version if your application supports multiple options.
Click Generate UUID.
Copy the generated UUIDs.
Use them in your application, database, or development workflow.

Common Uses

UUIDs are commonly used for:

Database record IDs
API resources
User identifiers
Session IDs
Transaction references
File identifiers
Application testing
Software development
Distributed systems
Sample data generation

Why Use UUIDs Instead of Sequential IDs?

Sequential numbers are easy to generate, but they can sometimes reveal information such as how many records exist or the order in which they were created.

UUIDs offer several advantages:

Extremely low probability of duplication
Can be generated independently without a central server
Suitable for distributed applications
Difficult to predict compared to sequential IDs
Widely supported across programming languages and databases

These benefits make UUIDs a popular choice for modern applications.

UUID Versions

Several UUID versions exist, each generated differently.

The most commonly used is Version 4 (UUID v4), which creates identifiers using randomly generated values.

Some systems also support other versions for specialised use cases, but Version 4 is typically the preferred choice for general-purpose applications.

Tips for Better Results

Generate a new UUID for each unique record or resource.
Avoid manually editing generated UUIDs.
Use the UUID version recommended by your application or framework.
Store UUIDs exactly as generated to maintain compatibility.
Keep formatting consistent throughout your project.

Frequently Asked Questions

What does the UUID Generator do?

It creates universally unique identifiers that can be used as IDs in databases, applications, APIs, and software projects.

What does UUID stand for?

UUID stands for Universally Unique Identifier. It is a standard format for generating identifiers with an extremely low chance of duplication.

Are UUIDs guaranteed to be unique?

No generation method can guarantee absolute uniqueness, but correctly generated UUIDs have an extremely low probability of collision and are considered unique for practical purposes.

Which UUID version should I use?

For most applications, Version 4 (UUID v4) is the most common choice because it generates random identifiers and is widely supported.

Can I generate multiple UUIDs at once?

Yes. Many UUID generators allow you to generate one or several UUIDs in a single operation.

Is my data uploaded?

No. UUIDs are generated locally within your browser, and no data is uploaded or stored.

Is the UUID Generator free?

Yes. You can generate UUIDs online for free without creating an account or downloading software.