UUID Version 5 Generator
There is no count control on this page: the same namespace and name always produce the same UUID, so asking for ten would return the same value ten times.
What a version 5 UUID is
A version 5 UUID is not random at all. It is derived by hashing a namespace UUID together with a name using SHA-1, then fixing the version and variant bits. The same namespace and the same name produce the same UUID every time, on any machine, in any language, forever.
That is the whole point: two systems that never talk to each other can arrive at the same identifier for the same thing, without a shared database and without any coordination.
Namespaces
The namespace keeps identifiers from separate systems apart. RFC 9562 defines four standard ones, DNS, URL, OID and X.500, and you can supply any UUID of your own as a namespace instead. Pick your own if your names are not domains or URLs, and keep it stable: change the namespace and every identifier you derived from it changes with it.
Check it yourself
The DNS namespace with the name example.com always yields cfbff0d1-9375-5685-968c-48ce8b15ae17. Those are the values this page opens on, so the UUID above should match, and it will match anywhere else that computes it correctly.
Version 5 or version 3
Prefer version 5. It is the same idea with SHA-1 instead of MD5, and MD5 is the weaker hash of the two. Reach for version 3 only when you have to match identifiers a system already produced with it.
Neither is a security mechanism. Both are one-way in practice, but a UUID is only 128 bits of a truncated hash, and a short or guessable name is a short or guessable input: never treat a derived UUID as a secret.