HTML Converter for .NET

The Aspose.HTML Converter for .NET is a high-performance plugin that allows developers to convert HTML and XHTML documents into multiple formats, including PDF, XPS, and image files. Designed for seamless integration, it supports complex layouts, external resources, and advanced rendering options, making it an essential tool for document automation, reporting, and web-to-print workflows.

Installation and Setup

  1. Install the Aspose.HTML package via NuGet or download assemblies from the downloads page .
  2. Apply your licensing keys, including metered licensing if applicable, to unlock full functionality.
  3. Reference the Aspose.Html namespace in your project.

Compatible with .NET Framework, .NET Core (2.0 to 3.1), .NET 5+, and .NET Standard 2.0/2.1. Works across Windows, macOS, and Linux environments.

Converting HTML to PDF

The most common scenario is converting HTML into PDF. You can configure options like encryption, page size, and margins.

using Aspose.Html;
using Aspose.Html.Converters;
using Aspose.Html.Saving;

// Create an instance of HTMLDocument
var document = new HTMLDocument("developer-guide.html");
var options = new PdfSaveOptions();

// Convert HTML to PDF
Converter.ConvertHTML(document, options, "developer-guide.pdf");

This example converts an HTML file into a PDF while preserving its layout.

Converting HTML to Image

You can also render HTML content to images such as PNG or JPEG.

using Aspose.Html;
using Aspose.Html.Converters;
using Aspose.Html.Saving;

// Create an instance of HTMLDocument
var document = new HTMLDocument("developer-guide.html");
var options = new ImageSaveOptions(ImageFormat.Png);

// Convert HTML to PNG
Converter.ConvertHTML(document, options, "developer-guide.png");

This code converts the HTML into a PNG image that can be used in reports or archives.

Converting HTML to XPS

To generate XPS documents from HTML:

using Aspose.Html;
using Aspose.Html.Converters;
using Aspose.Html.Saving;

// Create an instance of HTMLDocument
var document = new HTMLDocument("developer-guide.html");
var options = new XpsSaveOptions();

// Convert HTML to XPS
Converter.ConvertHTML(document, options, "developer-guide.xps");

Error Handling Example

Handle errors gracefully with try-catch:

try
{
    var document = new HTMLDocument("developer-guide.html");
    var options = new PdfSaveOptions();
    Converter.ConvertHTML(document, options, "developer-guide.pdf");
}
catch (Exception ex)
{
    Console.WriteLine($"Error converting HTML: {ex.Message}");
}

Key Features

  • Multi-Format Export: Convert HTML to PDF, XPS, and images.
  • Layout Fidelity: Preserves fonts, CSS, graphics, and external resources.
  • Advanced PDF Options: Support for PDF/A compliance, encryption, and metadata.
  • Cross-Platform: Works across .NET environments on Windows, Linux, and macOS.

Best Practices

  • Always apply licensing keys at application startup to avoid evaluation watermarks.
  • Validate external resources (CSS, images, fonts) are accessible before conversion.
  • Use PdfSaveOptions or ImageSaveOptions to fine-tune output quality and size.
  • For large HTML files, prefer stream-based conversion to reduce memory usage.

By integrating Aspose.HTML Converter for .NET, developers can efficiently transform HTML content into professional-grade PDF, XPS, or image outputs while ensuring layout consistency and high performance.

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