--- title: "4 Simple Steps to Create Thumbnail Images for Excel Documents in C#" published_at: "2023-08-03T10:34:16+00:00" modified_at: "2026-02-10T13:12:48+00:00" url: "https://www.syncfusion.com/blogs/post/excel-to-thumbnail-conversion-csharp" excerpt: "This blog explains how to create thumbnail images or Excel documents using the Syncfusion .NET Core Excel (XlsIO) Library." taxonomy_category: - "C#" - "Excel" - "File Formats" - "Syncfusion" taxonomy_post_tag: - ".NET" - "C#" - "Excel" - "Excel Library" - "File Formats" --- # 4 Simple Steps to Create Thumbnail Images for Excel Documents in C# [Mohan Chandran](https://www.syncfusion.com/blogs/author/mohan-chandran) ![4 Simple Steps to Create Thumbnail Images for Excel Documents in C#](https://www.syncfusion.com/blogs/wp-content/uploads/2023/08/4-Simple-Steps-to-Create-Thumbnail-Images-for-Excel-Documents-in-C.png) In today’s digital age, visual representation is crucial in capturing attention and conveying information effectively. Whether working on a personal project or developing professional software, creating visually appealing thumbnail images can significantly enhance the user experience and facilitate more straightforward navigation. This article will show you how to [create a thumbnail image for an Excel](https://help.syncfusion.com/file-formats/xlsio/worksheet-to-image-conversion) document using the [Syncfusion .NET Core Excel (XlsIO) Library](https://www.syncfusion.com/document-processing/excel-framework/net-core/excel-library) in C#. ## Creating thumbnail images for Excel documents using C# Follow these steps to create a thumbnail image for an Excel document using the Syncfusion .NET Excel Library: **Note:** If you are new to our Excel Library, our [Getting Started guide](https://help.syncfusion.com/file-formats/xlsio/getting-started-create-excel-file-csharp-vbnet) is highly recommended. 1. First, open [Visual Studio](https://visualstudio.microsoft.com/downloads/) and create a new .NET Core console application.![Create a .NET Core console application](https://www.syncfusion.com/blogs/wp-content/uploads/2023/08/Create-a-console-application-in-.NET-Core.png) 2. Then, install the latest version of the [Syncfusion.XlsIORenderer.Net.Core](https://www.nuget.org/packages/Syncfusion.XlsIORenderer.Net.Core) NuGet package.![Install the Syncfusion.XlsIORenderer.Net.Core NuGet package](https://www.syncfusion.com/blogs/wp-content/uploads/2023/08/Install-the-Syncfusion.XlsIORenderer.Net_.Core-Nuget-package..png) 3. Add the following code to the **Program.cs** file to convert an Excel document to an image.``` using (ExcelEngine excelEngine = new ExcelEngine()) { IApplication application = excelEngine.Excel; application.DefaultVersion = ExcelVersion.Xlsx; FileStream inputStream = new FileStream("../../../Data/InputTemplate.xlsx", FileMode.Open, FileAccess.Read); IWorkbook workbook = application.Workbooks.Open(inputStream); IWorksheet sheet = workbook.Worksheets[0]; //Initialize XlsIORenderer. application.XlsIORenderer = new XlsIORenderer(); //Convert to image. MemoryStream outputStream = new MemoryStream(); sheet.ConvertToImage(sheet.UsedRange, outputStream); } ``` 4. Then, add the following code to resize the image to thumbnail size.``` //Resize image to thumbnail size. System.Drawing.Image image = System.Drawing.Image.FromStream(outputStream); System.Drawing.Image thumbnail = image.GetThumbnailImage(100, 100, () => false, IntPtr.Zero); //Save image. thumbnail.Save("Image.png", System.Drawing.Imaging.ImageFormat.Png); ``` Following is the complete code of the **Program.cs** file.``` using System; using System.IO; using Syncfusion.XlsIO; using Syncfusion.XlsIORenderer; namespace Excel_to_Image { internal class Program { static void Main(string[] args) { using (ExcelEngine excelEngine = new ExcelEngine()) { IApplication application = excelEngine.Excel; application.DefaultVersion = ExcelVersion.Xlsx; FileStream inputStream = new FileStream("../../../Data/InputTemplate.xlsx", FileMode.Open, FileAccess.Read); IWorkbook workbook = application.Workbooks.Open(inputStream); IWorksheet sheet = workbook.Worksheets[0]; //Initialize XlsIORenderer. application.XlsIORenderer = new XlsIORenderer(); //Convert to image. MemoryStream outputStream = new MemoryStream(); sheet.ConvertToImage(sheet.UsedRange, outputStream); //Resize image to thumbnail size. System.Drawing.Image image = System.Drawing.Image.FromStream(outputStream); System.Drawing.Image thumbnail = image.GetThumbnailImage(100, 100, () => false, IntPtr.Zero); //Save the image. thumbnail.Save("Image.png", System.Drawing.Imaging.ImageFormat.Png); } System.Diagnostics.Process process = new System.Diagnostics.Process(); process.StartInfo = new System.Diagnostics.ProcessStartInfo("Image.png") { UseShellExecute = true }; process.Start(); } } } ``` Refer to the following images.![Input Excel document](https://www.syncfusion.com/blogs/wp-content/uploads/2023/08/Input-Excel-document.png) Input Excel document ![Thumbnail image for the input Excel document](https://www.syncfusion.com/blogs/wp-content/uploads/2023/08/Thumbnail-image-for-the-input-Excel-document.png) Thumbnail image for the input Excel document ## GitHub reference You can download the example for creating thumbnail images for Excel documents on [this GitHub page](https://github.com/SyncfusionExamples/XlsIO-Examples/tree/master/Real%20Time%20Examples%20in%20Excel/Excel%20To%20Thumbnail%20Image) . ## Conclusion Thanks for reading! In this blog, we’ve seen how to create thumbnail images for Excel documents using the [Syncfusion .NET Core Excel Library](https://www.syncfusion.com/document-processing/excel-framework/net-core/excel-library) in C#. Take a moment to peruse the [documentation](https://help.syncfusion.com/file-formats/xlsio/overview) , where you’ll find other features with accompanying code samples. Using this library, you can also export Excel data to [PDF](https://help.syncfusion.com/file-formats/xlsio/excel-to-pdf-conversion) , [data tables](https://help.syncfusion.com/file-formats/xlsio/working-with-data#exporting-from-worksheet-to-data-table) , [CSV](https://www.syncfusion.com/kb/9092/convert-excel-file-to-csv-in-c-vb-net) , [TSV](https://www.syncfusion.com/kb/8556/does-xlsio-support-tsv-files) , [HTML](https://help.syncfusion.com/file-formats/xlsio/working-with-excel-worksheet#save-worksheet-as-html) , [collections of objects](https://help.syncfusion.com/file-formats/xlsio/working-with-data#exporting-from-worksheet-to-collection-objects) , [ODS](https://help.syncfusion.com/file-formats/xlsio/excel-to-ods-conversion) , [JSON](https://help.syncfusion.com/file-formats/xlsio/excel-to-json-conversion) , and other file formats. Are you already a Syncfusion subscriber? You can download the product setup [here](https://www.syncfusion.com/account/downloads/studio/) . If you’re not a Syncfusion subscriber, you can download a [free 30-day trial](https://www.syncfusion.com/downloads/fileformats/confirm) to check out Essential Studio***®***‘s features. Please let us know in the comments section below if you have any questions about these features. You can also contact us through our [support forum](https://www.syncfusion.com/forums) , [support portal](https://support.syncfusion.com) , or [feedback portal](https://www.syncfusion.com/feedback/excel) . We are always happy to assist you! ## Related blogs - [6 Easy Ways to Export Data to Excel in C#](https://www.syncfusion.com/blogs/post/6-easy-ways-to-export-data-to-excel-in-c-sharp.aspx) - [Seamlessly Import and Export CSV Data in Excel Using C#](https://www.syncfusion.com/blogs/post/import-export-csv-data-in-excel-csharp.aspx) - [How to Export Data from SQL Server to Excel Tables in C#](https://www.syncfusion.com/blogs/post/export-data-from-sql-server-to-excel-in-c-sharp.aspx) - [Export Data from Collections to Excel and Group It in C#](https://www.syncfusion.com/blogs/post/export-data-from-collection-to-excel-and-group-csharp.aspx) - [Export Data to a Predefined Excel Template in C#](https://www.syncfusion.com/blogs/post/export-data-to-a-predefined-excel-template-in-c.aspx) - [Easy Steps to Export HTML Tables to Excel in C#](https://www.syncfusion.com/blogs/post/easy-steps-to-export-html-tables-to-an-excel-worksheet-in-c.aspx)