API Reference > imodelhub-client > iModelHubClient > ThumbnailHandler > download download Method Download a Thumbnail. download(requestContext: AuthorizedClientRequestContext, iModelId: string, thumbnail: Thumbnail | TipThumbnail): Promise<string> throws Error if a successful server response contains no content. throws IModelHubClientError with IModelHubStatus.UndefinedArgumentError or IModelHubStatus.InvalidArgumentError if one of the arguments is undefined or has an invalid value. throws ResponseError if a network issue occurs. Parameter Type Description requestContext AuthorizedClientRequestContext The client request context. iModelId string Id of the iModel. See HubIModel. thumbnail Thumbnail | TipThumbnail Small, Large or Tip thumbnail. Use ThumbnailHandler.get to get a SmallThumbnail or LargeThumbnail instance or provide Tip thumbnail information by constructing a TipThumbnail instance. Returns - Promise<string> Base64 encoded string containing the PNG image. Defined in clients/imodelhub/src/imodelhub/Thumbnails.ts Line 195 Last Updated: 12 June, 2024