Convert RTF to PDF in C# using a Free API

Converting an RTF file to PDF ensures that the content, formatting, and visual elements of the original document remains intact across different platforms and devices. This is particularly important when sharing documents with others or submitting them for professional purposes. In this article, we will explore how to programmatically convert RTF to PDF using a free .NET Word library.

Install the Free Library

First, we need to download the free library — Free Spire.Doc for .NET via the link below or install it directly via Nuget.

https://www.e-iceblue.com/Download/download-word-for-net-free.html

Friendly Reminder: The free library has certain page limitations while using. Details refer to:

Free .NET Word API - Processing Word in C#, VB.NET, ASP.NET

Convert an RTF file to a PDF file Using C#

We can use the free .NET Word API to load a file with .rtf extension and then convert it to PDF through Document.SaveToFile() method.

Sample C# code.

using Spire.Doc;

namespace RTFtoPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document doc = new Document();

            //Load a sample RTF document
            doc.LoadFromFile("Sample.rtf", FileFormat.Rtf);

            //Save it to PDF
            doc.SaveToFile("RTFtoPDF.pdf", FileFormat.PDF);
        }
    }
}

With the free library, we are also allowed to implement other document conversion features, such as converting RFT to Word, HTML to Word, TXT to Word, Word to PDF and many other Word document processing operations.