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Convert Excel to HTML with NET REST API

In this straightforward guide, you’ll discover how to convert XLS to HTML with the .NET REST API. By following the clear, step‑by‑step instructions below, we’ll build an XLS‑to‑HTML converter using the C# Low Code API. The resulting solution can be embedded in any .NET application running on macOS, Linux, or Windows, and the conversion is available at no cost.

Prerequisite

Steps to Convert XLS to HTML with NET REST API

  1. Set the Client ID and Client Secret for the API to convert XLS to HTML
  2. Create an instance of CellsApi class with client credentials to perform XLS to HTML conversion
  3. Specify the source XLS and output HTML file names and load the source XLS file in a memory stream
  4. Create an instance of the PostConvertWorkbookToHTMLRequest with input XLS file stream and other optional properties
  5. Call the Excel to HTML request method to convert XLS to HTML with NET REST API
  6. Save the rendered HTML file stream on the local disk

The aforementioned steps transform the file type from Excel to HTML with C# low code API. We will start the process with the initialization by configuring the SDK and creating the CellsAPI class object. We will then access the source XLS file using a FileStream and create an instance of the PostConvertWorkbookToPDFRequest class that is further used for performing the conversion to a HTML file stream using the PostConvertWorkbookToHtml() method.

Code for Excel to HTML Conversion in NET Low Code API

With just a few lines of C# code, you can harness the Aspose.Cells REST API SDK to transform an Excel file into HTML. Simply supply the local path to your XLS file, let the cloud API handle the conversion, and once the process finishes, download the resulting HTML stream and save it to your machine.

In this guide we explored how to transform XLS to HTML with Cloud API. If you’d like to convert Excel files to CSV instead, check out our tutorial on Convert Excel to CSV with NET REST API.

 

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