# Upload File Transformer

Upload File Transformer only accepts files with `.js`, `.ts`, and `.txt` extensions.

After creating the file transformer, you can run the file import or export transformer by following the steps:

* As a user, you can upload the file transformer using the upload button on the right side of the editor.

<figure><img src="https://448889121-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MbjY0HseEqu7LtYAt4d%2Fuploads%2Fgit-blob-38ed221b914501bf43d13812ff7e08b92ac625a3%2FFile%20transformers%20-%20import%20-%20upload.png?alt=media" alt=""><figcaption></figcaption></figure>

* After you finish uploading, the file transformer will automatically be replaced with the latest file transformer that was just uploaded.

<figure><img src="https://448889121-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MbjY0HseEqu7LtYAt4d%2Fuploads%2Fgit-blob-0cc25390c7eede1db44f58bdd4aa571236d44a46%2FFile%20transformers%20-%20import%20-%20filled.png?alt=media" alt=""><figcaption></figcaption></figure>