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)

3cb89741-dc22-4308-ac33-5bab7c93483d
bc77feb7-04c6-44ce-8dcd-1f46dd18c5cb
7247a405-e39a-4e81-b81d-d2e522190e54
a9004e4a-75e0-45f4-9397-f78ecc8202c2
499eae4b-9ad0-4b80-a893-50ae5372ef5c

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.