# UUID transform
<a name="uuid-transform"></a>

Use this transform to generate a 36-character unique identifier for each row in your data source.

**To add a UUID transform:**

1. Navigate to your visual ETL job in Amazon SageMaker Unified Studio.

1. Choose the plus icon to open the **Add nodes** menu.

1. Under **Transforms**, choose **UUID**.

1. Select the diagram to add the node to your visual ETL job.

1. Connect the transform node to a data source node.

1. Select the node on the diagram to view details about the transform.

1. Under **UUID column name**, enter a name to use for the new column that contains the unique identifiers.