In today's tutorial, we will be exploring how to extract text from PDF documents using two powerful PDF libraries, IronPDF and PDFSharp. We will be learning how text extraction works with these tools without needing to own Adobe library licensing, and how they compare against each other.

There are dozens of PDF-focused libraries out there to choose from, and by taking the time to compare them and learn how their features work, you will be able to pick out the right library for your project's needs. Text extraction is just one of the many examples of tasks you might need to carry out on your PDFs, with text extraction being helpful in situations where you might need to read or parse data from PDF files efficiently.

PDFSharp

PDFSharp is an open-source .NET library designed for creating and modifying PDF documents programmatically. While its primary strength lies in PDF generation and manipulation, it also provides basic tools for reading existing PDF files and extracting content, when paired with the right external libraries.

PDFSharp can do more beyond creating new PDF documents on the go, it can be used to modify existing PDF files, merge and split documents, add annotations, and more.

IronPDF

IronPDF is a professional-grade .NET library designed to simplify the process of working with PDF documents in C#. It is a feature-rich tool designed for developers building applications that involve PDF generation, manipulation, PDF encryption, convert PDF files, merge PDF pages, HTML to PDF conversion, content extraction, and more.

With its robust capabilities, IronPDF stands out as a versatile solution for creating and managing PDFs in both small-scale projects and enterprise-level applications.

IronPDF is designed to be compatible with modern .NET frameworks, including .NET Core, .NET 5, .NET 6, and .NET 7, as well as legacy versions like .NET Framework. It works seamlessly across operating systems like Windows, macOS, and Linux, and is fully compatible with Docker, Azure, and AWS environments. This ensures developers can deploy their PDF workflows on any platform or cloud service.

For today's example, we will be attempting to extract text from this PDF document within Visual Studio:

Extract Text from a PDF File Using PDFSharp

PDFSharp, in its current version, does not have native support for text extraction from PDF documents. It is primarily designed for creating and manipulating PDFs, such as drawing graphics, adding content, and merging documents, but it lacks a built-in mechanism for extracting text on its own, unable to handle special characters, advanced encoding, and so on. It may produce fragmented or incomplete text output, or blank strings instead of the actual PDF content. For example:

If you need advanced text extraction with better support for different fonts, encodings, and layouts, you will likely need to use a more specialized library, such as:

1. iText (or iText): This is a popular PDF library with strong support for text extraction and parsing.
2. Pdfium: Another option that excels at extracting text, especially from PDFs with complex formatting.

Extract Text from a PDF File Using IronPDF

Now, let's see how text extraction is handled using IronPDF. IronPDF's text extraction feature provides developers with a concise, yet powerful method for extracting text from PDF documents efficiently, without needing extra code to format correctly the data string into readable text.

using IronPdf;

public class Program
{
    public static void Main(string[] args)
    {
        // Provide the file path to the PDF document
        string pdfPath = @"invoice.pdf"; 
        
        // Load the PDF document using IronPDF
        var pdf = PdfDocument.FromFile(pdfPath);
        
        // Extract all text from the PDF
        var extractedText = pdf.ExtractAllText();
        
        // Output the extracted text to the console
        Console.WriteLine(extractedText);
    }
}

using IronPdf;

public class Program
{
    public static void Main(string[] args)
    {
        // Provide the file path to the PDF document
        string pdfPath = @"invoice.pdf"; 
        
        // Load the PDF document using IronPDF
        var pdf = PdfDocument.FromFile(pdfPath);
        
        // Extract all text from the PDF
        var extractedText = pdf.ExtractAllText();
        
        // Output the extracted text to the console
        Console.WriteLine(extractedText);
    }
}

Imports IronPdf

Public Class Program
    Public Shared Sub Main(args As String())
        ' Provide the file path to the PDF document
        Dim pdfPath As String = "invoice.pdf"

        ' Load the PDF document using IronPDF
        Dim pdf = PdfDocument.FromFile(pdfPath)

        ' Extract all text from the PDF
        Dim extractedText = pdf.ExtractAllText()

        ' Output the extracted text to the console
        Console.WriteLine(extractedText)
    End Sub
End Class

Imports IronPdf

Public Class Program
    Public Shared Sub Main(args As String())
        ' Provide the file path to the PDF document
        Dim pdfPath As String = "invoice.pdf"

        ' Load the PDF document using IronPDF
        Dim pdf = PdfDocument.FromFile(pdfPath)

        ' Extract all text from the PDF
        Dim extractedText = pdf.ExtractAllText()

        ' Output the extracted text to the console
        Console.WriteLine(extractedText)
    End Sub
End Class

IronPDF provides a simple and efficient API for extracting text from the given PDF path. It ensures that the extracted text is well-structured and accurate, making it a reliable option for developers who need to process PDF content in their applications.

Comparison

PDFSharp is a free, open-source library ideal for basic PDF creation and manipulation, but it has limited functionality and struggles with complex PDFs. While in theory, it may be used to extract text from PDF files, this would require advanced text parsing and may result in fragmented output.

IronPDF offers a more robust solution with advanced features like accurate text extraction, HTML-to-PDF conversion, and support for modern PDF standards. It's optimized for performance and ease of use with an intuitive API. While it is free for development, it also offers commercial licensing for its paid licensing tiers.

Conclusion

Both PDFSharp and IronPDF are valuable tools for working with extracting text from PDFs in C#, but they cater to different use cases:

• PDFSharp is a great choice for developers who need a free, open-source library for basic PDF creation and text extraction. However, its text extraction capabilities are limited and may not meet the needs of more complex applications.
• IronPDF, on the other hand, excels in text extraction, HTML-to-PDF conversion, and advanced PDF editing tasks. Its ease of use, cross-platform compatibility, and wide range of features make it a preferred choice for developers handling professional-grade PDF workflows.

For a deeper dive into how IronPDF outperforms other libraries, visit the official IronPDF Documentation.