About UUID Generator
A UUID is a 128-bit identifier long enough that independently generated values can be treated as unique without a central authority handing them out. Standard for database keys, request tracing and file naming.
How to use it
- Generate a UUID.
- Generate more if you need a batch.
- Copy the identifiers.
Worth knowing
Random UUIDs are not sequential, which makes them poor clustered database keys — inserts land all over the index. That is a performance consideration, not a correctness one.
Common questions
- Can two UUIDs collide?
- In principle yes; in practice the probability is small enough to ignore for any realistic volume.
- Are they secret?
- No. Treat a UUID as an identifier, never as an access token.