Free UUID Generator (v4, RFC 4122)
Generate random version 4 UUIDs (Universally Unique Identifiers) instantly in your browser. UUID v4 values are generated using cryptographically secure random numbers and are suitable for use as unique identifiers in databases, APIs, and distributed systems.
About This Tool
A UUID (Universally Unique Identifier) is a 128-bit label used to identify information in computer systems. Version 4 UUIDs are generated using random or pseudo-random numbers, making the chance of collision astronomically small — suitable for most practical applications.
UUIDs are commonly used as primary keys in databases, resource identifiers in REST APIs, session tokens, and correlation IDs in distributed logging systems.
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