UUID/GUID Generator
Generate random UUID v4 / GUID values instantly in your browser, one at a time or in bulk.
Click Generate to create UUIDs.
How to use this tool
A UUID (Universally Unique Identifier) is a 128-bit value designed to be unique across time and space without needing a central authority to hand them out. This tool generates version 4 UUIDs, built almost entirely from random bits, so the chance of two ever colliding is astronomically small even when they're generated independently on different machines. They're commonly used as database primary keys, API request IDs, session tokens, and file names — anywhere you need a unique identifier without coordinating with a server first.
For example, generating 3 UUIDs might produce something like 3f2504e0-4f89-41d3-9a0c-0305e82c3301, 9b74c989-3d5e-4d1a-8f8e-3a2b1c9d4e5f, and 1e0eaf05-6b41-4172-9f1c-6e2f6b3a9d0e — each one unique and safe to use immediately.
Choose how many UUIDs you want (1-50), then click Generate. Use the Copy button next to any UUID to copy just that one, or Copy All to copy the whole list at once.
FAQ
Is this UUID generator free to use?
Yes, this tool is completely free to use with no limits on how often you can use it.
Does my data get uploaded anywhere?
No. UUIDs are generated directly in your browser using the built-in crypto.randomUUID() function. Nothing is sent to a server.
What's the difference between a UUID and a GUID?
They're effectively the same thing. GUID is Microsoft's name for the same 128-bit identifier format standardized as UUID (version 4, randomly generated, in this tool's case).
How unique are these UUIDs really?
Version 4 UUIDs pack in 122 random bits, giving roughly 5.3 undecillion (5.3 x 10^36) possible values. Even generating billions of UUIDs per second, the odds of ever producing a duplicate are effectively zero — that's why UUIDs are trusted as unique identifiers without needing a central registry to hand them out.
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