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A high-performance and feature-rich WinUI Excel framework to work with Microsoft Excel documents. This framework has an Excel creation and editing library that allows you to create, read, and edit Microsoft Excel files. Its powerful conversion APIs make it easy to convert Excel files to HTML, images, and more.

WinUI Excel Framework modules.

Why Syncfusion?

No deployment fees

There are no distribution fees, or royalties, which makes Excel Library very cost-effective.

Blazing-fast performance

Optimized for usage across platforms, where speed and low memory usage are critical.

Powerful and comprehensive API

All the elements in a typical Excel document such as text, formatting, images, shapes, and tables are accessible through a comprehensive set of APIs.

Proven Excel Library

Syncfusion Excel Library (Essential XlsIO) is a mature and proven product, having evolved over 13+ years.

Fully documented

Syncfusion Excel Library comes with extensive documentation, knowledge base, and samples.


Use a single API across all platforms.

Excel creation and editing APIs

Syncfusion Excel Library (Essential XlsIO) is a high-performance WinUI Excel framework that allows users to create, read, edit, and protect Excel documents in WinUI applications without Microsoft Office or interop dependencies.

Import and export in WinUI Excel

Import and export

Import data from various data sources, collection objects, and HTML tables. Also, export data to data tables, collection objects, and nested classes.

WinUI Excel charts.

Excel charting

Excel Library supports 80+ chart types to visualize data. Similarly, sparklines are supported to visualize data within a cell.

WinUI Excel formulas.


More than 400 Excel functions are supported to evaluate formula cells quickly. Similarly, add-in functions, external formulas, and an array of formulas are supported.

Template markers in WinUI Excel.

Template markers

Import data to Excel worksheets like mail merge in a Word document. Customized data importing is also supported.

WinUI Excel formatting.


Use various cell and text formatting options along with advanced conditional formatting features.

WinUI Excel data processing.

Data processing

Perform various kinds of data processing such as data validation, sorting, and filtering.

Pivot tables used in WinUI Excel

Pivot tables

Pivot tables and pivot charts are widely used features in spreadsheets due to their ease-of-use in summarizing data. Syncfusion Excel Library allows you to create and edit them with just a few lines of code.

WinUI Excel protection.


Encrypt or decrypt password-protected Excel files. Also, protect the editing of workbooks, worksheets, and cells.

WinUI Excel shapes.


Create and edit various form controls, autoshapes, and comments.

For more information, check out our WinUI Excel Library features.


WinUI convert Excel to PDF.

Excel to PDF

Convert an Excel workbook or worksheet to PDF format. Various customization options are provided, like embedding fonts, ignoring empty pages or worksheets, and showing or hiding headers and footers.

Worksheet to image conversion in winui .

Worksheet to image

Worksheets can be converted to BMP, JPEG, PNG, and other image formats with content such as data, formatting, charts, tables, and shapes.

WinUI convert Excel to CSV.

Excel to CSV/TSV

Convert spreadsheet data to CSV and TSV formats with their widely used, lightweight reports.

Excel to HTML conversion in WinUI.

Excel to HTML

Dynamically render an Excel workbook or worksheet as an HTML file.

WinUI convert Excel to ODS.

Excel to ODS

Save Excel files in ODS formats to use in various applications like OpenOffice and Google Sheets.

Excel to SpreadsheetML conversion in WinUI.

Excel to SpreadsheetML

SpreadsheetML is easy to work with and designed to be human-readable and editable. Convert Excel files to SpreadsheetML with Syncfusion Excel Library.

Excel to JSON conversion in WinUI.

Excel to JSON

Convert an Excel workbook or worksheet to a JSON file in schema and non-schema formats.

WinUI Excel Code Example

Easily get started with the WinUI Excel Library using a few simple lines of C# code example as demonstrated below. Also explore our WinUI Excel Library Example that shows you how to render and configure the WinUI Excel.

//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
    //Instantiate the Excel application object
    IApplication application = excelEngine.Excel;

    //Set the default application version
    application.DefaultVersion = ExcelVersion.Xlsx;

    //Load the existing Excel document into IWorkbook
    Assembly executingAssembly = typeof(App).GetTypeInfo().Assembly;
    Stream inputStream = executingAssembly.GetManifestResourceStream("WinUISample.Sample.xlsx");
    IWorkbook workbook = application.Workbooks.Open(inputStream);

    //Get the first worksheet in the workbook into IWorksheet
    IWorksheet worksheet = workbook.Worksheets[0];

    //Assign some text in a cell
    worksheet.Range["A3"].Text = "Hello World";

    //Save the document as stream
    MemoryStream stream = new MemoryStream();

    //Custom method that saves the memory stream as a file
    Save(stream, "Output");

Frequently Asked Questions

The Syncfusion WinUI Excel library provides the following features:

  • Create, read, edit, and view Excel files with just a few lines of code.
  • Utilize top features: charts, formulas, tables, pivot tables, data validation, data import and export, conditional formatting, shapes, and security.
  • Convert Excel files into ODS, HTML, and images.
  • Excel charts can also be converted to images.
  • One of the best WinUI Excel libraries on the market, offering a rich set of APIs to interact with the software.
  • Extensive demos, documentation, and videos to learn quickly and get started with Syncfusion XlsIO.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue, 5 or fewer developers, and 10 or fewer total employees.

A good place to start would be our comprehensive getting started documentation.

Apart from WinUI, the Syncfusion Excel framework supports platforms for web (Blazor, Flutter, ASP.NET Core, ASP.NET MVC, and ASP.NET Web Forms), mobile (.NET MAUI, Flutter, Xamarin, and UWP), and desktop (Windows Forms, WPF, .NET MAUI, Flutter, Xamarin, and UWP).

You can find our Excel Framework demo here.


Greatness—it’s one thing to say you have it, but it means more when others recognize it. Syncfusion is proud to hold the following industry awards.

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