Question 1

What is a UUID?

Accepted Answer

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUID v4 uses random numbers to generate identifiers.

Question 2

Are the generated UUIDs truly random?

Accepted Answer

Yes. This tool uses the Web Crypto API (crypto.randomUUID or crypto.getRandomValues) which provides cryptographically secure random numbers.

Question 3

How many UUIDs can I generate at once?

Accepted Answer

You can generate up to 100 UUIDs in a single batch. Each one is cryptographically unique.

Question 4

What is the format of a UUID v4?

Accepted Answer

UUID v4 follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where x is a random hex digit and y is one of 8, 9, a, or b.

Question 5

Is this tool free?

Accepted Answer

Yes, completely free. No signup, no limits. All generation happens in your browser.

UUID Generator

Frequently Asked Questions

Related Tools

Frequently Asked Questions