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UUID Generator
Generate version 4 UUIDs instantly. Choose count, casing, and hyphen format — copy individually or all at once.
Frequently asked questions
+What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. Version 4 UUIDs are randomly generated.
+Are generated UUIDs truly unique?
UUID v4 has 2^122 possible values (~5.3×10^36), making the probability of collision astronomically small. They are considered unique for all practical purposes.
+What is the difference between UUID and GUID?
GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are the same format and serve the same purpose.