What is UUID?

UUID (Universal Unique Identifier) is a 128-bit identifier standardised by the Open Software Foundation to ensure global uniqueness in distributed systems. The standard format is:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx（ (8-4-4-4-12 hexadecimal digits).

Key Features:

- Global uniqueness： Very low probability of duplication (theoretically 1 billion UUIDs are generated per second, with a 50% probability of duplication over 100 years). Standards： Conforms to RFC 4122 international standard Multi-version support： • Version 1： Based on timestamps and MAC addresses Version 4： Based on random numbers (most commonly used)

Instructions for using the tool

1. Select Version： Generates secure UUIDv4 random identifiers by default 2. Number of Generations： Generates 1-1000 UUIDs in bulk3. Copy Result： One-click copy of standard format identifiers4. Application Scenarios： • Database primary key - Distributed system node identification - Unique naming of files/resources - Session ID generation

Technical Specification

All generated UUIDs contain: - 16 bytes length（ (128 bits) Standard delimiter（ (hyphen) - Version identification bit（ (13th character) - Variant identification bit（ (17th character) Note: This tool completes the calculation locally in the browser, without network transmission, to ensure data security.