UUID 生成器

批量生成随机 UUID (v4)。支持大写、无横线格式。

数量：:

大写No dashes

Click "Generate UUIDs" to create random UUIDs

About UUID v4

UUID (Universally Unique Identifier) v4 generates random 128-bit identifiers. With 122 random bits, the probability of a collision is astronomically low. UUIDs are commonly used as database primary keys, session tokens, and distributed system identifiers.

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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'

常见用途

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

常见问题

What is a UUID?

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.