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ConvertAPI C# Client

Convert your files with our online file conversion API

The ConvertAPI helps converting various file formats. Creating PDF and Images from various sources like Word, Excel, Powerpoint, images, web pages or raw HTML codes. Merge, Encrypt, Split, Repair and Decrypt PDF files. And many others files manipulations. In just few minutes you can integrate it into your application and use it easily.

The ConvertAPI.NET NuGet package makes it easier to use the Convert API from your .NET 2, 3.x, and 4.x projects without having to build your own API calls. You can get your free API secret at


Run this line from Package Manager Console:

Install-Package ConvertApi



You can get your secret at

ConvertApi convertApi = new ConvertApi("your-api-secret");

File conversion

Example to convert file to PDF. All supported formats and options can be found here.

ConvertApiResponse result = await convertApi.ConvertAsync("docx", "pdf", new[]
   new ConvertApiFileParam(@"c:\source\test.docx")   

// save to file
 var fileInfo = await result.SaveFileAsync(@"\result\test.pdf");

Other result operations:

// save all result files to folder

// get result files
ProcessedFile[] files = result.Files;

// get conversion cost
int cost = result.ConversionCost; 

Convert file url

ConvertApiResponse result = await convertApi.ConvertAsync("pptx", "pdf", new[]
   new ConvertApiFileParam(new Uri(""))

Additional conversion parameters

ConvertAPI accepts extra conversion parameters depending on converted formats. All conversion parameters and explanations can be found here.

ConvertApiResponse result = await convertApi.ConvertAsync("pdf", "jpg", new[]
   new ConvertApiFileParam(@"c:\source\test.docx"),
   new ConvertApiParam("ScaleImage","true"),
   new ConvertApiParam("ScaleProportions","true"),
   new ConvertApiParam("ImageHeight","300"),
   new ConvertApiParam("ImageWidth","300")

User information

You can always check remaining seconds amount by fetching user information.

ConvertApiUser user = await convert.GetUserAsync();
int secondsLeft = user.SecondsLeft;

More examples

You can find more advanced examples in the examples folder.

Converting your first file, full example:

ConvertAPI is designed to make converting file super easy, the following snippet shows how easy it is to get started. Let's convert WORD DOCX file to PDF:

  var convertApi = new ConvertApi("your-api-secret");  
  var conversionTask = await convertApi.ConvertAsync("docx", "pdf", 
      new ConvertApiFileParam(@"c:\source\test.docx")
  var fileSaved = await conversionTask.Files.SaveFilesAsync(@"c:\");
  //Catch exceptions from asynchronous methods
  catch (ConvertApiException e)
     Console.WriteLine("Status Code: " + e.StatusCode);
     Console.WriteLine("Response: " + e.Response);

      if (e.StatusCode == HttpStatusCode.Unauthorized)
          Console.WriteLine("Secret is not provided or no additional seconds left in account to proceed conversion. More information");

This is the bare-minimum to convert a file using the ConvertAPI client, but you can do a great deal more with the ConvertAPI .NET library. Take special note that you should replace your-api-secret with the secret you obtained in item two of the pre-requisites.

Issues & Comments

Please leave all comments, bugs, requests, and issues on the Issues page. We'll respond to your request ASAP!


The ConvertAPI .NET Library is licensed under the MIT license. Refere to the LICENSE file for more information.


A .NET library for the ConvertAPI




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