UUID / GUID Generator

Generate single or bulk version 4 UUIDs instantly.

About UUID / GUID Generator

Generate universally unique identifiers (UUIDs) on the fly. This tool supports bulk generation of Version 4 UUIDs using secure cryptographic algorithms.

How to use

Specify the number of UUIDs you need, and the tool will instantly generate a list of secure, random identifiers. You can copy individual UUIDs or the entire list at once.

Why use this tool?

Whether you need mock data for a database or unique keys for a frontend application, generating them locally ensures they are truly random and instantly available.

Frequently Asked Questions

What is the difference between a UUID and a GUID?

UUID and GUID refer to the same concept — a 128-bit identifier formatted as 8-4-4-4-12 hexadecimal characters. GUID is Microsoft's terminology; UUID is the open standard.

How many UUIDs can I generate at once?

You can generate up to 1,000 UUIDs in a single batch, which is more than enough for populating seed data, test fixtures, or development databases.

Are the generated UUIDs truly unique?

Version 4 UUIDs are generated using cryptographic randomness. The probability of a collision is astronomically small — approximately 1 in 5.3 undecillion.

Is UUID / GUID Generator free to use?

Yes, UUID / GUID Generator is completely free to use with no account, subscription, or hidden fees required — ever.

Does my data get uploaded to a server?

No. UUID / GUID Generator processes everything directly inside your browser using modern Web APIs. Your data is never sent to any server, ensuring complete privacy.