---
description: 'Element: Ultimate Uploadcare - Uploader'
---

# List of UUIDs

### What is a UUID?

A **UUID** (Universally Unique Identifier) is the unique string of characters assigned to your image by Uplaodcare. This ID is used for every interaction with Uploadcare to determine which image should be served, edited and/or deleted. Most of the workflow actions require this UUID to run.

Given the consistent structure of Uploadcare file paths, it's also possible to extract the UUID from the file path using Regex. To make this simpler, I've provided a little workflow action that extracts the UUID and returns it ([extract-uuid](../../backend-workflow-actions/extract-uuid "mention")).

### State Definition

The **'List of UUIDs'** exposed state is an array of file UUIDs for the files currently populating the uploader. Whenever the files in the uploader change, the value of this state will update accordingly.&#x20;

### Example

```json
[
  "3db984c8-8820-401e-b2d3-7261fe2262c2",
  "7b272291-f31a-4947-93d0-69682260ad0b",
  "6c0cf60d-86e6-4ba9-b3c9-c8e168cac9e7",
  "318d1500-fb81-4a96-9302-bab5c2a2aa50"
]
```

