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UUID Generator

Generate random version-4 UUIDs (GUIDs) in bulk and copy them with one click. Free, instant, and private: everything runs on your device.

Private by design — UUIDs are generated locally with your browser's crypto engine and never uploaded.

How to generate a UUID online

  1. Enter how many UUIDs you need (1 to 100) in the box above.
  2. Click Generate — random version-4 UUIDs appear instantly, one per line.
  3. Click Copy all to grab the whole list, or select individual lines you need.

Why use a UUID generator?

UUIDs (also called GUIDs) give you globally unique identifiers without a central authority or database round-trip, which makes them ideal for primary keys, API tokens, file names, event IDs, and distributed systems where two machines must mint IDs independently without colliding. A version-4 UUID is built from 122 random bits, so each value is effectively impossible to guess or duplicate. This generator uses your browser's cryptographically secure random source, producing standards-compliant identifiers in milliseconds — and because it runs entirely client-side, none of your generated IDs are ever logged or transmitted.

Frequently asked questions

Is this UUID generator free and private?
Yes — it is 100% free with no sign-up, and completely private. UUIDs are generated in your browser using the native crypto API; nothing is sent to or stored on any server.
What is a version-4 UUID?
A UUID v4 is a 128-bit identifier whose bits are almost entirely random (with a few fixed version and variant bits). It looks like xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx and is the most common type for keys, tokens, and IDs.
Is a UUID the same as a GUID?
Effectively yes. GUID (Globally Unique Identifier) is Microsoft's name for the same 128-bit standard. The format and uniqueness guarantees are identical, so a v4 UUID can be used anywhere a GUID is expected.
Are these UUIDs really unique?
For practical purposes, yes. A v4 UUID has 122 random bits, so the chance of generating the same one twice is astronomically small — you would need to create billions of them before a collision became remotely likely.

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