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UUID Generator
Generate unique UUIDs and GUIDs instantly
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UUID Generator
Generate unique UUIDs and GUIDs instantly
About This Tool
A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. The term GUID is also used, typically in Microsoft systems.
UUID v4 is generated using random numbers, while UUID v1 is based on the current timestamp and MAC address. Both are practically unique.
Frequently Asked Questions
What is a UUID used for?
UUIDs are used as database primary keys, identifiers for distributed systems, session IDs, and anywhere you need a unique identifier without central coordination.
How unique are UUIDs?
UUID v4 has 2^122 possible values, making collisions extremely unlikely. Even generating billions of UUIDs, the chance of a duplicate is negligible.
What's the difference between UUID and GUID?
Technically, they're the same thing. GUID (Globally Unique Identifier) is Microsoft's term for UUID. They follow the same standard and format.