using IronPdf; // Disable local disk access or cross-origin requests Installation.EnableWebSecurity = true; // Instantiate Renderer var renderer = new ChromePdfRenderer(); // Create a PDF from a HTML string using C# var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>"); // Export to a file or Stream pdf.SaveAs("output.pdf"); // Advanced Example with HTML Assets // Load external html assets: Images, CSS and JavaScript. // An optional BasePath 'C:\site\assets\' is set as the file location to load assets from var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\"); myAdvancedPdf.SaveAs("html-with-assets.pdf");

using IronPdf; using System; // Step 1. Creating a PDF with editable forms from HTML using form and input tags // Radio Button and Checkbox can also be implemented with input type 'radio' and 'checkbox' const string formHtml = @" <html> <body> <h2>Editable PDF Form</h2> <form> First name: <br> <input type='text' name='firstname' value=''> <br> Last name: <br> <input type='text' name='lastname' value=''> <br> <br> <p>Please specify your gender:</p> <input type='radio' id='female' name='gender' value= 'Female'> <label for='female'>Female</label> <br> <br> <input type='radio' id='male' name='gender' value='Male'> <label for='male'>Male</label> <br> <br> <input type='radio' id='non-binary/other' name='gender' value='Non-Binary / Other'> <label for='non-binary/other'>Non-Binary / Other</label> <br> <p>Please select all medical conditions that apply:</p> <input type='checkbox' id='condition1' name='Hypertension' value='Hypertension'> <label for='condition1'> Hypertension</label><br> <input type='checkbox' id='condition2' name='Heart Disease' value='Heart Disease'> <label for='condition2'> Heart Disease</label><br> <input type='checkbox' id='condition3' name='Stoke' value='Stoke'> <label for='condition3'> Stoke</label><br> <input type='checkbox' id='condition4' name='Diabetes' value='Diabetes'> <label for='condition4'> Diabetes</label><br> <input type='checkbox' id='condition5' name='Kidney Disease' value='Kidney Disease'> <label for='condition5'> Kidney Disease</label><br> </form> </body> </html>"; // Instantiate Renderer var renderer = new ChromePdfRenderer(); renderer.RenderingOptions.CreatePdfFormsFromHtml = true; renderer.RenderHtmlAsPdf(formHtml).SaveAs("BasicForm.pdf"); // Step 2. Reading and Writing PDF form values. var FormDocument = PdfDocument.FromFile("BasicForm.pdf"); // Set and Read the value of the "firstname" field var FirstNameField = FormDocument.Form.FindFormField("firstname"); FirstNameField.Value = "Minnie"; Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value); // Set and Read the value of the "lastname" field var LastNameField = FormDocument.Form.FindFormField("lastname"); LastNameField.Value = "Mouse"; Console.WriteLine("LastNameField value: {0}", LastNameField.Value); FormDocument.SaveAs("FilledForm.pdf");

Published May 2, 2023

What is iText? (C# and Java PDF Library Alternatives Using IronPDF)

The iText PDF library is a Java and .NET library for creating and manipulating PDF files. iText 7 is the advanced version of iText 5 and iTextSharp. It is a simpler, more performant, and extensible library that meets the growing challenges of today's PDF document processes and document needs, one add-on at a time.

iText Group NV

The iText Group is a world pioneer in PDF (Portable Document Format) technology, including products such as iText 7 Suite, iText pdf2Data, and iText DITO application software.

The iText 7 Core is an open-source PDF library that you can incorporate into your own applications for creating interactive forms. It is a rethinking of the successful engine used in iText 5 with a modular code structure that allows for future enhancements and expansion as well as easier scripting.

Features of the iText software library

The iText library has multiple features for business users:

Create, read, and manipulate PDF documents
Add digital signatures to PDF documents
Fill out and flatten interactive PDF forms
Add tags to PDF documents
Create maps and books
Add bookmarks, page numbers, watermarks, and other features to existing PDF documents
It supports PDF documents in compliance with:
- PDF specifications including PDF 2.0 (ISO 32000-2)
- PDF/A (ISO 190005; PDF/A-1a/b, PDF/A-2a/b/u, PDF/A-3a/b/u)
- PDF/UA (ISO 14289)

About iText

iText is a technology company in the digital documents space. The company’s flagship product is an open-source Java library and .NET library for creating and manipulating PDF documents in Java and .NET (C#).

Creating PDF documents using iText 7

Let's take a look at a hello world source code example of generating iText PDF documents.


    var writer = new PdfWriter(dest);
    var pdf = new PdfDocument(writer);
    var document = new Document(pdf);
    document.Add(new Paragraph("Hello World!"));
    document.Close();


    var writer = new PdfWriter(dest);
    var pdf = new PdfDocument(writer);
    var document = new Document(pdf);
    document.Add(new Paragraph("Hello World!"));
    document.Close();

Dim writer = New PdfWriter(dest)
	Dim pdf = New PdfDocument(writer)
	Dim document As New Document(pdf)
	document.Add(New Paragraph("Hello World!"))
	document.Close()

VB C#

We create an instance of PdfWriter. An object that can write a PDF file is called PdfWriter. After the file format structure has been completed, the PdfWriter simply writes the various file parts and objects that make up a valid document. It has no idea what the PDF document is about.

The PdfWriter listens to a PdfDocument, so it knows what to write. The added content is managed by the PdfDocument, which also distributes it over several pages and keeps track of any pertinent data.

The low-level, PDF-specific code is finished once we have a PdfWriter and a PdfDocument. A document is created with the PdfDocument as an argument. We may forget that we are producing PDFs now that we have the document object.

The phrase "Hello World" appears in a paragraph created and then added to the document object.

Limitations

iText 7 is paid and has limited functionalities. They do not provide all the functionalities in a single package. We need to use different libraries for different purposes. For instance:

PDF creation and PDF generation are supported by iText 7 while HTML to PDF Conversion is supported by pdfHTML. On the other side, PDF which includes removing sensitive data from PDF is supported by pdfSweep.

Data extraction such as extraction of images, tables, and text from PDF documents is provided by the pdf2Data library. RUPS supports PDF debugging to manipulate PDF documents.

Similarly, other features have libraries to support them, which are part of the iText 7 Suite. So, it is very difficult for the developer to manage so many DLLs.

Its commercial license is also very expensive. They have not mentioned the price on their license page as shown below. We need to contact their sales department for the quotation, which will cost us time.

Let's suppose, if we are working on generating PDF documents, and at the same time we need to extract images, tables, or text from the existing PDF. In this case, we need to buy iText 7 Suite as well as iText pdf2Data which will cost us more.

What is iText? (C# and Java PDF Library Alternatives Using IronPDF): Figure 1 - iText Website

Is there any alternative to iText software, which provides all the mentioned features in a single library with a reasonable commercial license? The answer is Yes.

IronPDF

IronPDF is .NET and Java Library developed and maintained by Iron Software. IronPDF is the most popular C# and Java PDF library for creating and editing PDFs. Its simple API enables developers to quickly generate professional, high-quality PDFs from HTML in .NET projects. It prioritizes accuracy, ease of use, and speed.

The features of the IronPDF include:

Generate PDF from HTML, String, URL, Razor, ASPX, and MVC view
Extract images, tables, and text without using any other library
Convert images such as scanned documents into PDF and vice versa
It provides functions for adding page numbers, headers/footers, signatures, attachments, passwords and security.
It provides high performance by providing full multithreading and async support
Other 50+ features which we cannot list here
Compatible with all .NET languages such as C#, VB.NET, and F#.
Compatible with all .NET versions including .NET Standard, .NET Core, .NET 5, 6, & 7.
IronPDF for Java also provides all the above-mentioned features and is compatible with Java, Kotlin and Scala.
Supports every operating system including Windows, Linux, and Mac operating systems.
Supports every app type such as Web, Mobile, and desktop.

Let's discuss a bit about its licensing.

IronPDF License

IronPDF is free for development and does not require any license. However, its commercial license is required for using it in production. You can always avail free trial at any time. Its commercial license varies from 749 USD to 2999 USD. You can select the package as per your need and start working. You don't have to contact their sales which saves time. Moreover, their commercial license includes 24/7 support.

What is iText? (C# and Java PDF Library Alternatives Using IronPDF): Figure 2 - IronPDF

Conclusion

What is iText? (C# and Java PDF Library Alternatives Using IronPDF): Figure 3 - Comparison

IronPDF provides all the functionalities in a single package. It is like all in one solution. We need to use different packages for the different features in the case of iText 7. IronPDF's commercial license can easily be purchased with full support without contacting sales. On other hand, we need to contact sales to request a quote to use iText 7 for commercial purposes.

We have kept this article simple and comprehensive. Feel free to ask any questions in the comment section.