UUID Generator
Generate UUIDs / GUIDs
π 100% client-side β your data never leaves this page5 UUIDs
d99e394f-b20d-4e32-b634-7a65dd8d9e28
f68ae6ea-0285-4a89-bc4c-bc9f98d75c0f
50979477-66ce-4330-af4d-53a2a16dab8c
741bf7d4-7056-4ee8-9eee-6714e8fa7d0d
0aca9dc6-0a72-4ee8-9217-ae31351d06b4
About this tool
Generate universally unique identifiers (UUIDs) in v4 (random) or v1 (time-based) format. Supports bulk generation and uppercase/lowercase output.
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.