UUID v3 v3 · name / MD5
A deterministic UUID created by hashing a name and namespace with MD5.
Overview
The same namespace and name always produce the same UUID. Because it is hash-based rather than random, it is reproducible. It uses MD5.
Structure
| Bit length | 128 |
|---|---|
| Character length | 36 |
| Format | hex 8-4-4-4-12 |
| Sortable | No |
| Random-based | No |
When to use
Use it when the same input must always map to the same ID (for example, turning a URL or domain into a stable ID). If you need a secure hash, v5 (SHA-1) is recommended.
Example
6fa459ea-ee8a-3ca4-894e-db77e160355e