Convert Word document to PDF in ASP.NET

4 Jul 20233 minutes to read

Syncfusion Essential DocIO is a .NET Word library used to used to create, read, edit, and convert Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can convert a Word document to PDF in ASP.NET Web Forms.

Steps to convert Word document to PDF in C#

Step 1: Create a new ASP.NET Web application project.

Create ASP.NET Web application in Visual Studio

Step 2: Select the Empty project.

Create ASP.NET Web application in Visual Studio

Step 3: Install the Syncfusion.DocToPDFConverter.AspNet NuGet package as a reference to your project from

Install DocIO ASP.NET NuGet package


Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering Syncfusion license key in your application to use our components.

Step 4: Add a new Web Form in your project. Right click on the project and select Add > New Item and add a Web Form from the list. Name it as MainPage.

Step 5: Add a new button in the MainPage.aspx as shown below.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="MainPage.aspx.cs" Inherits="Convert_Word_Document_to_PDF.WebForm1" %>

<!DOCTYPE html>

<html xmlns="">
<head runat="server">
    <form id="form1" runat="server">
             <asp:Button ID="Button1" runat="server" Text="Convert Word to PDF" OnClick="OnButtonClicked" />

Step 6. Include the following namespace in your MainPage.aspx.cs file.

using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;
using Syncfusion.DocToPDFConverter;
using Syncfusion.Pdf;

Step 7: Include the below code snippet in the click event of the button in MainPage.aspx.cs, to convert the Word document to Pdf and download it.

//Open an existing Word document.        
string filePath = Server.MapPath("~/App_Data/Template.docx");

//Loads file into Word document
using (WordDocument document = new WordDocument(filePath))
    //Instantiation of DocToPDFConverter for Word to PDF conversion
    using (DocToPDFConverter converter = new DocToPDFConverter())
        //Converts Word document into PDF document
        using (PdfDocument pdfDocument = converter.ConvertToPDF(document))
            //Saves the PDF document to MemoryStream.
            MemoryStream stream = new MemoryStream();
            pdfDocument.Save("sample.pdf", HttpContext.Current.Response, HttpReadType.Save);
            stream.Position = 0;

You can download a complete working sample from GitHub.

By executing the program, you will get the PDF document as follows.

Word to PDF in ASP.NET

Click here to explore the rich set of Syncfusion Word library (DocIO) features.

An online sample link to convert Word document to PDF in ASP.NET Core.