UUID 生成器
生成 UUID / GUID
🔒 100% client-side — your data never leaves this page5 UUIDs
0428581e-e6e3-47f6-b8f7-79f1f83918bf
fa12e531-37f2-4f4c-a24a-418626322f9f
13cec038-ce5f-4205-ac4d-76f2193ec015
a4970803-c169-4cc3-80c5-d5cd27d7d56d
9f81bf7a-bcde-4cae-9189-3f9da6d7917b
About this tool
生成 v4（随机）或 v1（基于时间）格式的 UUID，支持批量生成和大小写切换。
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across all space and time. It is typically written as 32 hexadecimal characters in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
What is the difference between UUID v4 and v1?
UUID v4 is randomly generated and is the most common choice. UUID v1 is based on the current timestamp and MAC address, making it sortable by creation time.
Are UUIDs truly unique?
UUID v4 has 122 random bits, making the probability of collision astronomically small (roughly 1 in 5 undecillion). For all practical purposes, they are unique.