Convert XLSX to HTML in C#

Convert XLSX to HTML in .NET

Follow these simple steps to convert XLSX files to HTML in .NET. You can view the converted files as they are, or render and display them as HTML without using any external software.

Get the respective assembly files from the downloads or fetch the whole package from NuGet to add Conholdate.Total for .NET directly in your workspace.

Create Converter object to convert XLSX document
Set the convert options for HTML format
Call Convert method of Converter class instance for conversion to HTML
Set options for HTML viewer
Create Viewer object to view converted HTML as HTML

Free App for XLSX to HTML Conversion

	// Supports converting documents between Word, Excel, PowerPoint, Project, Images, Web, Email, Metafiles and Diagram file formats.
	// Supported file formats: https://docs.groupdocs.com/conversion/net/supported-document-formats/
	using (Converter converter = new Converter("input.xlsx"))
	{
	var convertOptions = converter.GetPossibleConversions()["pdf"].ConvertOptions;

	converter.Convert("output.pdf", convertOptions);
	}

	HtmlViewOptions viewOptions = HtmlViewOptions.ForEmbeddedResources("output{0}.html");

	using (Viewer viewer = new Viewer("output.pdf"))
	{
	viewer.View(viewOptions);
	}

view raw excel-to-pdf-conversion.cs hosted with ❤ by GitHub

Convert XLSX to HTML with Watermarks

Accurately convert XLSX to HTML exactly as the original source file and apply text or image watermarks to HTML pages using C# .NET.

Create Converter object to convert XLSX document
Create new instance of WatermarkOptions class
Specify watermark properties (color, width, text, image etc)
Instantiate the proper ConvertOptions class
Set Watermark property of the ConvertOptions instance
Call Convert method of Converter class instance for conversion to HTML

Used in AI & Automation Workflows

While Conholdate.Total for .NET and Java does not use AI internally but our high-performance APIs are widely used in AI-powered apps, RPA workflows and intelligent automation systems. Developers often pair our document processing tools with machine learning models for OCR, NLP, data classification or intelligent content extraction across large-scale enterprise applications.

The .NET Excel conversion library offers comprehensive support for converting to and from password protected archives. Additionally, it provides the ability to compress the conversion results into various archive formats, including ZIP, RAR, 7Z, TAR, GZ, and BZ2.

	// Supports converting documents and adding watermarks to 100+ file formats including Word, Excel, PowerPoint, Project, Images, Web, Email, Metafiles and Diagrams
	// Supported file formats: https://docs.groupdocs.com/conversion/net/supported-document-formats/
	using (Converter converter = new Converter("input.docx"))
	{
	WatermarkOptions watermark = new WatermarkOptions
	{
	Text = "Sample watermark",
	Color = Color.Red,
	Width = 100,
	Height = 100,
	Background = true
	};

	PdfConvertOptions options = new PdfConvertOptions
	{
	Watermark = watermark
	};

	converter.Convert("output.pdf", options);
	}

view raw convert-word-to-pdf-and-add-text-watermark-to-converted-pdf.cs hosted with ❤ by GitHub

Frequently Asked Questions

How can I convert XLSX files to HTML in .NET platform using demos or code examples?

Conholdate.Total for .NET provides a powerful suite of APIs to help you get started with XLSX to HTML conversion in .NET. It offers a variety of C# .NET code examples and pre-built demos to simplify the conversion process, and quickly integrate XLSX to HTML conversion feature within popular frameworks like ASP.NET Web Forms, MVC, and Docker.

What file formats for documents and images are supported by Conholdate.Total for .NET?

Conholdate.Total for .NET integrates APIs from Aspose and GroupDocs to enable .NET programmers to perform various document manipulation actions on a wide range of file formats including Word, Excel, PDF, PowerPoint, Visio, HTML and images in .NET, C#, ASP.NET and VB.NET applications.

Does Conholdate.Total for .NET support batch XLSX files conversion to other formats?

Yes. Conholdate.Total for .NET supports batch conversion of XLSX documents, allowing developers to convert multiple files at once.

Can I convert password-protected XLSX files to HTML in .NET?

Yes. Conholdate.Total for .NET supports the conversion of password-protected XLSX files. With built-in methods to handle encrypted documents, you can securely convert sensitive files to HTML while preserving their confidentiality and integrity.

Does the conversion preserve charts, images, and formatting from XLSX?

Absolutely. The conversion maintains the original layout, charts, images, and formatting (e.g., fonts, colors, cell styles) to ensure the HTML output matches the XLSX file precisely.

How does the API handle large or complex XLSX files?

Conholdate.Total for .NET is optimized for performance, leveraging efficient memory management to process large XLSX files. Developers can further optimize by splitting files or adjusting resource allocation settings.

What are the benefits of converting XLSX files to HTML?

Converting XLSX documents to HTML using Conholdate.Total for .NET APIs provides a number of advantages, including portability, security, accessibility, scalability, compatibility, and customization. You can specify the output format, page range, and compression settings to customize the conversion process. The XLSX to HTML conversion API is simple to use and highly efficient, making it simple to quickly and easily convert your XLSX documents.

How do I customize the output HTML file?

Conholdate.Total for .NET APIs offer a number of customization features that you can use to control the output HTML file when converting XLSX to HTML. These features allow you to improve the quality of the converted file, protect it with watermarks, and more.

What are the licensing costs for Conholdate.Total’s XLSX to HTML conversion API?

Conholdate.Total for .NET offers a fully functional free trial version for 30 days. Paid plans are available for higher usage levels. Developers should carefully review the pricing and licensing terms before using the document conversion API.