UUID / GUID Generator
Free online UUID and GUID generator. Instantly generate secure, random Version 4 UUIDs for your database keys and unique identifiers.
UUID / GUID Generator (v4)
What is a UUID / GUID?
A Universally Unique Identifier (UUID) or Globally Unique Identifier (GUID) is a 128-bit number used to identify information in computer systems.
The most common version, Version 4, is generated using cryptographically strong random numbers. Because the number of possible UUIDs is incredibly vast ($2^122$), the probability of ever generating a duplicate is virtually zero.
Common Use Cases:
- Primary keys in databases (PostgreSQL, MySQL, MongoDB).
- Session IDs and tracking cookies.
- Unique transaction or order IDs.