UUID / GUID generator

Generate RFC 4122 version 4 UUIDs in bulk.

Runs on your deviceFreeNo account

How to use UUID generator

Set how many ids you need and generate. Each UUID is 122 bits of randomness plus version bits. Use them for database keys, filenames, and idempotency tokens. They are not sequential and reveal no timestamp.

Create one or hundreds of UUIDv4 identifiers using crypto.getRandomValues. Copy a single id or download a list.

Also searched as uuid generator, guid generator, random uuid. All processing for this tool happens in your tab unless labeled otherwise.

Questions

UUID v1 or v7?

This generator emits v4 (random). Time-ordered v7 is not included yet.

Collision risk?

For practical volumes, collisions are astronomically unlikely.

Uppercase?

Toggle hex case if your system expects uppercase GUIDs.

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