UUID (Universally Unique Identifier) is a 128-bit identifier that complies with the RFC 4122 standard, typically represented in the hexadecimal format "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx". GUID is Microsoft's implementation of the UUID standard, and the two are interchangeable in most application scenarios. UUIDs are generated through mechanisms such as timestamps, random numbers, or namespaces, offering an extremely low collision probability globally, making them a core identification solution in distributed systems and data integration.
UUIDs are widely used in database primary keys, distributed system node identification, API request tracking, device unique IDs, session tokens, and cryptographic signatures, among other scenarios. Their decentralized generation method avoids single-point allocation bottlenecks, enhancing system scalability and security. Even in cross-regional, cross-system massive data environments, UUIDs maintain a high degree of uniqueness and consistency.
This tool provides standard-compliant online UUID generation services, supporting multiple versions such as v1 (time and MAC-based), v4 (fully random), v6, and v7 (time-ordered). Users can select the version, generation count, letter case, and hyphen retention status according to their actual needs. It also offers convenient features like one-click copying of all results, batch downloading as TXT files, and clearing results, greatly improving development and testing efficiency.
Generated UUIDs can be directly used in various development frameworks, database systems, microservices architectures, and game configurations (such as Minecraft plugins). It is recommended to use v4 for general business scenarios; if time-ordered or more readable identifiers are needed, v6 or v7 versions can be chosen. UUIDs with hyphens removed are more suitable for URLs, file names, or specific storage formats. It is advised to perform format validation and version adaptation when integrating into systems to ensure specification compliance and security.
UUID (Universally Unique Identifier) is a standard format used to uniquely identify information in distributed systems. This tool supports multiple versions, batch generation, and format customization to meet various development, testing, and integration needs.
This tool can also be used on mobile devices to generate and copy UUIDs.