Online UUID | GUID Generator

This is an online free web tool to generate UUIDs (universally unique identifier).




The UUIDs generated by this site conform to RFC 4122 whenever possible.


What is UUID?

UUID (or GUID) is an acronym for 'Universally Unique Identifier' (or 'Globally Unique Identifier'). The term GUID is generally used by developers working with Microsoft technologies, while UUID is used everywhere else.

UUID Uniqueness

128-bits is big enough and the generation algorithm is unique enough that if 1,000,000,000 UUIDs per second were generated for 1 year the probability of a duplicate would be only 50%.

UUIDs Usage

UUIDs are used in enterprise software development in C#, Java, and C++ as database keys, component identifiers or just about anywhere else a truly unique identifier is required.


The UUIDs generated by this site are provided AS IS without warranty of any kind, not even the warranty that the generated UUIDs are actually unique. You are responsible for using the UUIDs and assume any risk inherent to using them. You are not permitted to use the UUIDs generated by this site if you do not agree to these terms. Do not use any UUIDs found on cached versions of this page.