UUID Generator
Generate one or many random version 4 UUIDs, with options for uppercase and no hyphens. They come from the browser's cryptographic random source, so nothing is sent anywhere.
What a v4 UUID is good for
A version 4 UUID is 122 random bits formatted as 32 hex digits in five groups. The point is that two machines can each mint identifiers with no coordination and effectively never collide, which makes them handy for database keys, container and volume names, API idempotency keys, and config identifiers in a homelab.
Because they are random, v4 UUIDs do not sort by creation time. If you need keys that sort chronologically, that is what newer time-ordered schemes like UUIDv7 are for; for most self-hosted uses, v4 is the right default.
Need other generated values? The password generator and hash generator round out the set.