Question 1

What is a UUID?

Accepted Answer

A UUID (Universally Unique Identifier) is a 128-bit value designed to be practically unique across systems, applications, and devices. It is commonly used in databases, APIs, distributed systems, and cloud applications.

Question 2

What is a Version 4 UUID?

Accepted Answer

Version 4 UUIDs are generated using cryptographically secure random numbers. They are the most widely used UUID version because they are simple, reliable, and have an extremely low probability of collisions.

Question 3

Is this UUID generator secure?

Accepted Answer

Yes. Every UUID is generated locally in your browser using the native Crypto API. No identifiers are transmitted, stored, or shared with any server.

Question 4

Can I generate multiple UUIDs at once?

Accepted Answer

Yes. This tool allows you to generate multiple UUIDs in a single operation, making it ideal for development, testing, imports, and batch processing.

Question 5

What is the difference between UUID and GUID?

Accepted Answer

There is virtually no difference. GUID is Microsoft's name for the same universally unique identifier standard commonly referred to as UUID.

Question 6

Can two UUIDs ever be the same?

Accepted Answer

While theoretically possible, the probability is extraordinarily small. For practical applications, Version 4 UUIDs are considered unique.

Question 7

Can I remove the hyphens from a UUID?

Accepted Answer

Yes. This generator can produce UUIDs either in the standard hyphenated format or as a continuous 32-character hexadecimal string.

Question 8

Should I use UUIDs instead of sequential IDs?

Accepted Answer

It depends on your application. UUIDs are ideal for distributed systems and independent data generation, while sequential IDs may still be preferable in some database scenarios.

Question 9

Do these UUIDs follow an official standard?

Accepted Answer

Yes. The generated identifiers comply with the UUID Version 4 format defined by RFC 9562 and are produced using the browser's native implementation.

Question 10

Does this tool work offline?

Accepted Answer

Yes. UUID generation happens entirely within your browser, so no internet connection or communication with external servers is required.