Convert HTML to PDF using C# REST API

Discover how to convert HTML to PDF using the C# REST API in a fast, automated workflow. This tutorial walks you through generating a PDF from an HTML file with the C# Low‑Code API and a Dotnet‑based Cloud SDK, while demonstrating how to apply various options to fine‑tune the output document.

Prerequisite

Steps to Convert HTML File to PDF using C# RESTful Service

  1. Start by adding the necessary libraries from Aspose.HTML Cloud so your project can work with HTML and file conversion
  2. Use your Client ID and Secret to securely connect to Aspose Cloud services and access its conversion features with the HtmlApi object
  3. Grab the conversion API from your initialized object so you can start turning HTML into other formats
  4. Declare the PDFConversionOptions and set the page size and margins by setting the width, height, and all four margins to shape your final PDF file
  5. Run the conversion with the ConvertAsync by giving it your source HTML file and telling it where to save the resulting PDF

These steps summarize the process for converting an HTM file to PDF using C# Low Code API. First, you set up access to Aspose.HTML Cloud by adding the appropriate libraries, logging in with your credentials, and getting the classes/modules that handle conversions. Then you choose how you want the PDF to generate, its size and margins—and invoke the API to turn your HTML file into a PDF.

Code to Transform HTML to PDF using C# REST API

The sample code illustrates how to convert an HTML document to PDF using the C# .NET API. Keep in mind that every property of the PDFConversionOptions object is optional—you can omit them and let the defaults take effect. All numeric values in this object are expressed in inches.

We’ve walked through extracting a table from an Excel workbook and saving it as an HTML file. When you’re ready to transform that Excel data into JSON, be sure to check out our guide on Convert HTML to DOCX using C# REST API.

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