[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [Query](./firestore_lite.query.md) > [withConverter](./firestore_lite.query.withconverter_1.md) ## Query.withConverter() method Applies a custom data converter to this query, allowing you to use your own custom model objects with Firestore. When you call [getDocs()](./firestore_.getdocs.md) with the returned query, the provided converter will convert between Firestore data and your custom type `U`. Signature: ```typescript withConverter(converter: FirestoreDataConverter): Query; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | converter | [FirestoreDataConverter](./firestore_lite.firestoredataconverter.md)<U> | Converts objects to and from Firestore. | Returns: [Query](./firestore_lite.query.md)<U> A `Query` that uses the provided converter.