Use a browser-based UUID v7 generator to create sortable, time-ordered version-7 UUIDs that work well as database primary keys. They are generated on your device and never sent to a server.
A version-7 UUID puts a timestamp in its leading bits, so rows created in order also sort in order. That keeps a database index compact and insertions efficient, which is exactly where fully random v4 UUIDs cause fragmentation. If you want the uniqueness of a UUID without hurting index locality, v7 is the version to reach for.
A client-side generator builds v7 UUIDs in your browser, so you can create one or a batch without sending anything to a server. That is handy for seeding test data or generating keys during development. It is free and needs no account.
A v7 UUID encodes a timestamp in its leading bits, so newer values sort after older ones.
For insertion-ordered keys, yes, because time ordering keeps the index compact.
No. They are created in your browser and never uploaded.