# Base64 to File

> Convert a Base64-encoded string into a file using a native activity in the Studio Web API workflow designer.

The **Base64 to File** activity converts a Base64-encoded string into a file directly in the API workflow designer, without writing custom JavaScript code.

Use it when a step in your workflow receives a file as an inline Base64 string, for example inline image or audio data returned by an AI model, and you need a file to pass to a later activity.

## Using the Base64 to File activity

To add a **Base64 to File** activity to your workflow:

1. On your API workflow designer canvas, select the plus (+) icon. The **Add activity** menu appears.
2. Select **More ...**, then **Base64 to File**.
3. In the **Properties** panel, configure the following fields:
    * **Base64** - Enter a base64 file or a raw base64 string to convert to a file.
    * **File name** - Enter an optional name for the created file.
    * **MIME type** - Enter an optional MIME type for the created file.
4. Debug the workflow to execute the activity and generate output fields for later use.