UUIDs are useful labels for records, but they should not be mistaken for access controls or a complete data model.
Use an identifier to refer to a…
Use an identifier to refer to a record, then apply authentication and authorization separately. Knowing an identifier should not be enough to read or mutate a protected resource.
Choose the UUID version and storage format…
Choose the UUID version and storage format that match your system. Document whether values are generated by the browser, a service, or a database.
Test collision handling, validation, and indexing behavior…
Test collision handling, validation, and indexing behavior in the application that owns the records. A generator cannot prove how another system will store or compare the value.
Use the related tool carefully
This guide is paired with a browser-only utility. The tool is a practical aid for small examples and inspection; it is not a substitute for application testing, a formal data pipeline, or professional review where the decision has higher consequences.
Open the related UUID v4 Generator