[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [DocumentReference](./firestore_lite.documentreference.md) > [withConverter](./firestore_lite.documentreference.withconverter.md) ## DocumentReference.withConverter() method Applies a custom data converter to this `DocumentReference`, allowing you to use your own custom model objects with Firestore. When you call , [getDoc()](./firestore_.getdoc.md), etc. with the returned `DocumentReference` instance, the provided converter will convert between Firestore data and your custom type `U`. Passing in `null` as the converter parameter removes the current converter. Signature: ```typescript withConverter(converter: null): DocumentReference; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | converter | null | Converts objects to and from Firestore. Passing in null removes the current converter. | Returns: [DocumentReference](./firestore_lite.documentreference.md)<[DocumentData](./firestore_lite.documentdata.md)> A `DocumentReference` that uses the provided converter.