Create identifiers without a central counter
A UUID is a 128-bit identifier used for records, files, requests, and test data. Version 4 UUIDs draw their variable bits from randomness, so separate systems can generate identifiers without coordinating a sequence. Generate one or a small batch above, then copy the values into your application or dataset.
What a UUID does and does not do
A UUID helps avoid accidental ID collisions, but it is not a password or proof of authorization. Do not rely on an unguessable-looking URL alone to protect private data. Access controls still need to check who is allowed to view or change a record.
Using the values
UUIDs are commonly stored in a database as text or in a compact binary representation. Keep the format consistent across systems. This tool creates version 4 UUIDs using the browser's cryptographic random number generator; generating another set will produce different values.