UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information. Version 4 UUIDs are randomly generated, making collision probability astronomically low.

Are UUIDs truly unique?

While not mathematically guaranteed, UUID v4 has 2^122 possible values. The probability of generating a duplicate is essentially zero for practical purposes.

When should I use UUIDs?

Use UUIDs as database primary keys, API resource identifiers, session tokens, or any time you need a unique identifier without a central authority.

UUID 生成器

批量生成随机 UUID（v4）。支持大写和无连字符格式。

数量：:

大写无连字符

点击「生成 UUID」来创建随机 UUID

关于 UUID v4

UUID（通用唯一标识符）v4 生成随机的 128 位标识符。拥有 122 位随机位，碰撞概率极低。UUID 常用于数据库主键、会话令牌和分布式系统标识。

使用方法

Set the number of UUIDs to generate (1-20)
Choose options: uppercase, no dashes
Click 'Generate UUIDs'
Click on any UUID to copy, or use 'Copy All'

使用场景

Database primary keys
API resource identifiers
Distributed system identifiers
Session and correlation IDs

UUID 生成器

关于 UUID v4

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