PDF to HTML in .NET

This page describes how to convert PDF to HTML in .NET using the Pdfcrowd API. The API is easy to use and the integration takes only a few of lines of code.

Samples

Installation

Download pdfcrowd-5.6.2-dotnet.zip, unzip it and add a reference to pdfcrowd.dll to your project.

We also offer other installation options (NuGet, GitHub).

Authentication

Authentication is needed in order to use the Pdfcrowd API. The credentials used for accessing the API are your Pdfcrowd username and the API key.

You can try out the API without registration using the following demo credentials:
  • Username: demo
  • API key: ce544b6ea52a5621fb9d55f8b542d14d

To get your personal API credentials, you can start a free API trial or buy the API license.

Examples

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // run the conversion and write the result to a file
            client.convertFileToFile("/path/to/logo.pdf", "logo.html");
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // run the conversion and store the result into the "html" variable
            byte[] html = client.convertFile("/path/to/logo.pdf");

            // at this point the "html" variable contains HTML raw data and
            // can be sent in an HTTP response, saved to a file, etc.
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // create an output stream for the conversion result
            FileStream outputStream = new FileStream("logo.html", FileMode.CreateNew);

            // run the conversion and write the result into the output stream
            client.convertFileToStream("/path/to/logo.pdf", outputStream);

            // close the output stream
            outputStream.Close();
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // run the conversion and write the result to a file
            client.convertUrlToFile("https://pdfcrowd.com/static/pdf/apisamples/invoice.pdf", "invoice.html");
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // run the conversion and store the result into the "html" variable
            byte[] html = client.convertUrl("https://pdfcrowd.com/static/pdf/apisamples/invoice.pdf");

            // at this point the "html" variable contains HTML raw data and
            // can be sent in an HTTP response, saved to a file, etc.
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // create an output stream for the conversion result
            FileStream outputStream = new FileStream("invoice.html", FileMode.CreateNew);

            // run the conversion and write the result into the output stream
            client.convertUrlToStream("https://pdfcrowd.com/static/pdf/apisamples/invoice.pdf", outputStream);

            // close the output stream
            outputStream.Close();
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // run the conversion and write the result to a file
            client.convertRawDataToFile(File.ReadAllBytes("/path/to/hello_world.pdf"), "logo.html");
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // run the conversion and store the result into the "html" variable
            byte[] html = client.convertRawData(File.ReadAllBytes("/path/to/hello_world.pdf"));

            // at this point the "html" variable contains HTML raw data and
            // can be sent in an HTTP response, saved to a file, etc.
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // create an output stream for the conversion result
            FileStream outputStream = new FileStream("logo.html", FileMode.CreateNew);

            // run the conversion and write the result into the output stream
            client.convertRawDataToStream(File.ReadAllBytes("/path/to/hello_world.pdf"), outputStream);

            // close the output stream
            outputStream.Close();
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}
using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToHtmlClient client =
                new pdfcrowd.PdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.setDebugLog(true);

            // run the conversion and write the result to a file
            client.convertFileToFile("/path/to/logo.pdf", "logo.html");
            
            // print URL to the debug log
            System.Console.WriteLine("Debug log url: " + client.getDebugLogUrl());
            
            // print the number of available conversion credits in your account
            System.Console.WriteLine("Remaining credit count: " + client.getRemainingCreditCount());
            
            // print the number of credits consumed by the conversion
            System.Console.WriteLine("Consumed credit count: " + client.getConsumedCreditCount());
            
            // print the unique ID of the conversion
            System.Console.WriteLine("Job id: " + client.getJobId());
            
            // print the total number of pages in the output document
            System.Console.WriteLine("Page count: " + client.getPageCount());
            
            // print the size of the output in bytes
            System.Console.WriteLine("Output size: " + client.getOutputSize());
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Troubleshooting

API Method Reference

Refer for details to the API Method Reference.