Generate random UUIDs (v4) instantly. Click to copy.
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify resources. Version 4 UUIDs are randomly generated and look like: 550e8400-e29b-41d4-a716-446655440000
UUIDs are used in databases, APIs, distributed systems, and anywhere you need a unique ID without a central authority. The chance of collision is 1 in 2122.
GUID (Globally Unique Identifier) is Microsoft's name for UUID. They are identical in format and function.
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