About UUID v4
A UUID (Universally Unique Identifier) is a 128-bit value used as an identifier in databases, distributed systems and APIs. Version 4 UUIDs are randomly generated; the chance of two colliding is astronomically small.
Frequently asked questions
What kind of UUID is generated?
RFC 4122 version 4 UUIDs (random). When the browser supports crypto.randomUUID it is used; otherwise the tool falls back to crypto.getRandomValues.
How many UUIDs can I generate at once?
Up to 500 at a time. Use "Copy all" to copy the entire batch.