UUID Generator
How to Generate a UUID
A UUID is a long, practically unique identifier used in software and databases. Generate one with the tool below, and here's what it is and when to use it.
Generate a UUID
Steps to generate a UUID
- Click the button in the tool above to create a UUID.
- Copy it with one click.
- Generate as many as you need.
What a UUID is for
A UUID (universally unique identifier) is a 128-bit value, written as 32 hex digits in five groups, like 123e4567-e89b-12d3-a456-426614174000. Version 4 UUIDs are random.
They're used as primary keys, request IDs and file names where you need an identifier that won't collide, even across different systems, without a central counter.
Frequently asked questions
How do I generate a UUID?
Click generate in the tool above and copy the result. Each one is a random version-4 UUID.
Are UUIDs really unique?
Effectively yes. Random v4 UUIDs have so many possible values that a collision is astronomically unlikely.
What is a UUID used for?
As unique identifiers in databases, APIs and file names where two systems must not produce the same ID.
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