HTML to Image C#

If you need website thumbnails, printable PDFs, or a snapshot of dynamic web pages, converting HTML to an image is a fast and reliable solution. This guide shows how to transform HTML into high‑quality JPG or PNG files using C#. Below is a quick overview of the topics covered:

Why Render Webpage to Image?

Converting HTML to an image provides several practical benefits:

  • Easy Sharing: Images can be embedded in presentations, reports, and social media without worrying about browser compatibility.
  • Consistent Appearance: An image captures the exact layout, fonts, and colors, guaranteeing the same look on every device.
  • Offline Access: Once rendered, the image can be viewed without an internet connection, ideal for documentation or archived content.
  • Content Protection: Images are harder to copy or edit than raw HTML, helping safeguard proprietary designs and sensitive data.

Webpage to Image Converter - C# API Installation

To start, obtain the Conholdate.Total for .NET DLL from the official New Releases page or add it via NuGet, which also pulls in all required dependencies:

PM> Install-Package Conholdate.Total

After installation, reference the library in your C# project and you’re ready to use the HTML‑to‑image API.

Convert HTML to JPG Image in C#

Follow these steps to generate a JPG file from HTML:

  1. Load the HTML content with the HTMLDocument class.
  2. Create an ImageSaveOptions instance and set the output format to JPG.
  3. Call ConvertHTML to render the page and save the result.

The example below demonstrates the complete workflow:

Convert HTML to PNG Image in C#

To produce a PNG image, use a similar process with a few PNG‑specific settings:

  1. Write the HTML markup to a temporary file.
  2. Open the file with HTMLDocument.
  3. Configure ImageSaveOptions for PNG output, including page size and margins.
  4. Execute ConvertHTML to create the PNG file.

The code snippet below illustrates these steps:

Free Evaluation License

A free temporary license is available for proof‑of‑concept projects, allowing you to test the full functionality without the usual evaluation restrictions.

Summing Up

HTML‑to‑image conversion in C# unlocks powerful capabilities for reporting, thumbnail generation, and automated document creation. By using the Conholdate.Total API and the code examples provided, you can seamlessly add JPG or PNG rendering to any .NET application. If you have questions or need assistance, reach out to us through the forum.

See Also