UUID

Umbra's UUID tool generates v4 or v7 identifiers (also called GUIDs), one at a time or in bulk, entirely offline.

Generate random (v4) or time-ordered (v7) UUIDs, formatted with your choice of case, hyphens, and braces. Generate in bulk and copy or download the full list as a file.

Umbra's UUID tool showing five generated v4 identifiers with case and hyphen formatting options.

FAQ

Why not generate UUIDs with a free online tool?
A UUID generator has no reason to ever touch a network — there's nothing to send. Umbra's generates locally and instantly, in bulk if needed.
What's the difference between v4 and v7?
v4 is random; v7 is time-ordered, which makes it sort naturally by creation time — a better choice for a database key.