A UUID (Universally Unique Identifier) is a 128-bit value, usually written as 32 hex digits in groups separated by hyphens, used to identify records, sessions, or objects without a central authority handing out IDs.

What version of UUID does this generate?

Version 4 — generated from random or pseudo-random numbers via the browser's crypto.randomUUID() API, which is cryptographically strong. The odds of a collision are astronomically small.

Are these UUIDs sent to a server?

No. Every UUID is generated locally in your browser and never transmitted anywhere.

Can I generate UUIDs without hyphens or in uppercase?

Yes — switch the format to "No hyphens" for a compact 32-character string, "UPPERCASE" for capital hex digits, or "{Braces}" for the format some Windows and .NET APIs expect.

UUID GENERATOR

Generate random v4 UUIDs, one at a time or in bulk. Nothing leaves your browser.

How many5

Format

5 UUIDs (v4)

010004bb-2939-4cfe-8264-ccef2f277602
7a42dd66-4756-4e38-b1c7-01847b420f27
8dff354f-0a6f-42a6-a7a6-395134019277
825e29fd-b6fc-4b83-ac41-05a03d3b7753
f57e4be4-6eeb-42be-9238-4f3d241368ba

How to generate a UUID

1
Pick how many UUIDs you want, from 1 to 50.
2
Choose a format: standard, uppercase, no hyphens, or wrapped in braces.
3
Click Generate, then copy a single UUID or all of them at once.

Questions

What is a UUID?: A UUID (Universally Unique Identifier) is a 128-bit value, usually written as 32 hex digits in groups separated by hyphens, used to identify records, sessions, or objects without a central authority handing out IDs.
What version of UUID does this generate?: Version 4 — generated from random or pseudo-random numbers via the browser's crypto.randomUUID() API, which is cryptographically strong. The odds of a collision are astronomically small.
Are these UUIDs sent to a server?: No. Every UUID is generated locally in your browser and never transmitted anywhere.
Can I generate UUIDs without hyphens or in uppercase?: Yes — switch the format to "No hyphens" for a compact 32-character string, "UPPERCASE" for capital hex digits, or "{Braces}" for the format some Windows and .NET APIs expect.