Generate random UUIDs (Universally Unique Identifiers) for databases, APIs, and applications.
This free UUID generator creates random Version 4 UUIDs (Universally Unique Identifiers) also known as GUIDs (Globally Unique Identifiers). UUIDs are 128-bit numbers used to uniquely identify information in computer systems without requiring a central authority.
What is a UUID? A UUID is a 128-bit identifier standardized by RFC 4122. Version 4 UUIDs are randomly generated and have a probability of duplication so low (1 in 2^122) that they're considered unique for practical purposes.
UUID Format: Standard format is 8-4-4-4-12 hexadecimal digits (e.g., 550e8400-e29b-41d4-a716-446655440000). The tool supports multiple formats including compact (no hyphens), uppercase, and with braces.
Use Cases: Database primary keys, API request IDs, session identifiers, file names, distributed systems, microservices, transaction IDs, object identifiers, cache keys, temporary tokens.