import { Worksheet } from '../core/Worksheet.js';
import { Workbook } from '../core/Workbook.js';
export interface JsonExportOptions {
    header?: boolean;
    includeEmpty?: boolean;
    dateFormat?: 'iso' | 'epoch' | 'serial';
    range?: string;
}
export declare function worksheetToJson(ws: Worksheet, options?: JsonExportOptions): any[];
export declare function workbookToJson(wb: Workbook, options?: JsonExportOptions): Record<string, any[]>;