Learn how to implement React Spreadsheet file import to upload and open Excel or CSV files seamlessly in your React application. Step-by-step guide with code examples.

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Importing Excel and CSV files into React applications while preserving formatting and formulas can be complex with manual parsing. The Syncfusion React Spreadsheet component provides built-in file import capabilities through server-side processing. Files are uploaded to a backend service (ASP.NET Core/MVC) that uses the XlsIO library to convert them into JSON workbooks, which are then rendered in the browser. Two import methods are available: using the built-in Ribbon UI (File → Open) for an Excel-like experience, or the programmatic open() method with custom file uploaders for advanced workflows. The component supports .xlsx, .xls, .xlsm, .xlsb, and CSV formats, with event hooks (beforeOpen, openComplete) for customization and validation.

What’s the Best Way to Import Excel and CSV Files into a React App?