TToolWox

UUID Generator

UUID Generator creates random version-4 UUIDs (universally unique identifiers) using your browser's built-in crypto.randomUUID. Generate a single ID or a batch of up to 100 and copy them all at once.

UUIDs are the standard way to give records a unique identifier without coordinating with a central database, making them essential for distributed systems, databases and APIs.

How to use UUID Generator

  1. 1

    Choose how many

    Enter the number of UUIDs you need, from 1 to 100.

  2. 2

    Generate

    Click Generate to produce the list of unique identifiers.

  3. 3

    Copy individually or all

    Copy a single UUID, or use Copy all to grab the whole batch as newline-separated text.

What is a UUID?

A UUID is a 128-bit identifier written as 32 hexadecimal digits in five hyphen-separated groups, for example 123e4567-e89b-12d3-a456-426614174000. The odds of two randomly generated version-4 UUIDs colliding are astronomically small.

Version 4 UUIDs are generated almost entirely from random data, which makes them ideal when you need a unique value without revealing ordering or timing information.

Where UUIDs are used

Databases use UUIDs as primary keys so that records can be created on many servers without coordinating an auto-incrementing counter. APIs use them as resource identifiers, and applications use them to tag events, sessions and files.

Because they can be generated client-side, UUIDs let you assign an identity to a new object before it is ever saved to the server.

Frequently asked questions

Which UUID version does this generate?
Version 4, which is based on random numbers. It is the most common choice for general-purpose unique identifiers.
Can I generate many UUIDs at once?
Yes. You can generate up to 100 UUIDs in a single batch and copy them all together.
Are these UUIDs guaranteed unique?
Collisions are theoretically possible but so improbable that version-4 UUIDs are treated as unique in practice.

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