[Home](./index.md) > [@firebase/firestore](./firestore.md) > [/](./firestore_.md) > [Bytes](./firestore_.bytes.md) > [fromBase64String](./firestore_.bytes.frombase64string.md) ## Bytes.fromBase64String() method Creates a new `Bytes` object from the given Base64 string, converting it to bytes. Signature: ```typescript static fromBase64String(base64: string): Bytes; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | base64 | string | The Base64 string used to create the Bytes object. | Returns: [Bytes](./firestore_.bytes.md)