Convert XHTML to HTML Online or in C#

Programmatic XHTML to HTML Conversion for .NET

Aspose.HTML for .NET loads XHTML into an HTMLDocument and saves the resulting DOM as HTML. Create HTMLSaveOptions , select the HTML document type, and call HTMLDocument.Save() .

This workflow changes serialization from XHTML to HTML; it does not rasterize the page. The saved document can include adjacent resource files according to the selected resource-handling settings.

C# Code Example and Interactive XHTML to HTML Converter

Use the interactive example below to load an XHTML file, save its DOM as HTML, and review the corresponding C# code. The example sets HTMLSaveOptions.DocumentType to HTML before calling HTMLDocument.Save().

How to Convert XHTML to HTML in C#

1. Load the XHTML source into an HTMLDocument.
2. Create HTMLSaveOptions and set DocumentType to HTML.
3. Configure resource handling when CSS, images, fonts, or linked documents need custom processing.
4. Call HTMLDocument.Save() with the output path and save options.

XHTML to HTML Saving Options and Documentation

Read the document-saving guide for HTML serialization and resource-handling examples. Consult the HTMLSaveOptions and HTMLDocument.Save() references when selecting the document type and destination.

Use HTMLDocument.Save() to write the generated DOM to a file path, URL, or custom resource handler. Use HTMLSaveOptions when the application needs to control the document type or handling of linked resources.

XHTML to HTML Conversion Notes

• The operation serializes a DOM. It produces HTML markup rather than an image or fixed-layout representation.
• XML syntax may normalize during parsing and saving. Compare namespaces, element and attribute casing, empty elements, and declarations when exact source text matters.
• Linked resources are separate concerns. Configure resource handling for CSS, images, fonts, and referenced documents.
• Relative URLs depend on document context. Preserve a valid source location or base URI before saving resources.
• Validate downstream behavior, not byte equality. Test the generated HTML in the applications that will consume it.

Install Aspose.HTML for .NET

Add the package to your project, then use the C# example above as the minimal XHTML to HTML workflow.

Install Aspose.HTML for .NET from NuGet with the .NET CLI:

dotnet add package Aspose.HTML

You can also use the NuGet Package Manager UI or run Install-Package Aspose.HTML in the Package Manager Console. See the installation guide for setup details, or request a temporary license to evaluate the API without evaluation limitations.

XHTML to HTML Conversion FAQ

1. How do I convert XHTML to HTML in C#?

Load the source into an HTMLDocument, create HTMLSaveOptions with DocumentType set to HTML, and call HTMLDocument.Save().

2. Does this conversion render the XHTML page?

No. It serializes the parsed DOM as HTML markup. Use an image, PDF, or DOCX target when rendered output is required.

3. Will the HTML be byte-for-byte identical to the XHTML?

No. Parsing and serialization can normalize declarations, casing, empty elements, namespaces, or other syntax while preserving the document structure.

4. How are CSS and images saved?

Configure ResourceHandlingOptions in HTMLSaveOptions; saved resources can be written beside the output document or handled by a custom resource handler.

5. Can I control the output destination programmatically?

Yes. HTMLDocument.Save() supports file paths, URLs, and resource-handler overloads.