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PRODUCT COMPARISONS

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

Full Comparison

Looking for a detailed feature-by-feature breakdown? See how IronPDF stacks up against Itext on pricing, HTML support, and licensing.

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IronPDF vs iTextSharp / iText7

Comprehensive .NET PDF library comparison — feature-by-feature with evidence-based context

iTextSharp / iText7
13
out of 20 features
10 Yes 7 Complex 3 No
IronPDF ✦
20
out of 20 features
20 Yes 0 Complex 0 No
Feature iTextSharp / iText7 IronPDF ✦
PDF Creation & Conversion
HTML/CSS to PDF $ Paid Add-on
HTML→PDF via pdfHTML add-on (separate package; AGPL/commercial model).
✓ Yes
Chromium-based engine with pixel-perfect CSS3, Flexbox, and Grid rendering built-in.
JavaScript Execution ? Unknown
pdfHTML describes HTML/CSS→PDF conversion, but JS execution support is not stated in docs.
✓ Yes
Fully executes JS during rendering — dynamic charts, SPAs, and interactive content.
Programmatic Generation ✓ Yes
Positioned as a programmable PDF SDK for .NET — create, edit, and enhance.
✓ Yes
Generate from HTML templates, strings, ASPX views, or images. Chromium handles layout.
URL to PDF $ Paid Add-on
Possible via pdfHTML add-on with URL fetching, but not a core feature.
✓ Yes
RenderUrlAsPdf() captures any live URL with full CSS/JS rendering.
DOCX to PDF ✕ No
No native Word conversion — iText is a PDF-native SDK.
✓ Yes
DocxToPdfRenderer converts Word docs preserving structure and formatting.
Reading & Extraction
Text Extraction ✓ Yes
PdfTextExtractor.GetTextFromPage() with multiple extraction strategies.
✓ Yes
Extracts text with layout awareness. Combines with IronOCR for scanned docs.
Render Pages to Images ? Unknown
OCR workflows mention rendering, but a primary-source "PDF→image renderer" module isn't evidenced in cited iText docs.
✓ Built-in
Native rasterization to PNG, JPEG, BMP with configurable DPI.
Built-in OCR $ Paid Add-on
pdfOCR add-on available; install notes mention platform-specific/native dependencies (e.g., Linux/macOS runtime requirements).
✓ Via IronOCR
Native integration with IronOCR for 127+ language OCR on scanned PDFs.
Editing & Manipulation
Merging & Splitting ✓ Yes
PdfMerger class in .NET API; official examples discuss merging via PdfMerger.
✓ Yes
One-line merge, split, append, prepend, and page reordering with intuitive API.
Headers, Footers & Page Numbers ✓ Yes
PDF Association listing confirms ability to add "page numbers" and similar features to existing PDFs.
✓ Yes
HTML-based headers/footers with auto page numbers, dates, and custom content.
Watermarks ✓ Yes
PDF Association listing explicitly includes "watermarks … to existing PDF documents."
✓ Yes
ApplyWatermark() accepts HTML/CSS — full control over opacity, rotation, position.
Stamp Text & Images ✓ Yes
Programmatic content placement available via iText's canvas and layout APIs.
✓ Yes
TextStamper & ImageStamper with Google Fonts, positioning, per-page control.
Redact Content ✓ Yes
iText provides redaction annotation support via the cleanup module.
✓ Yes
RedactTextOnAllPages() removes sensitive text permanently in a single line.
Security & Compliance
Encryption & Passwords ✓ Yes
Full encryption and permission controls via iText's security API.
✓ Yes
AES encryption, owner/user passwords, granular permissions (print, copy, annotate).
Digital Signatures ✓ Yes
Dedicated digital signing documentation and signing API (PdfSigner).
✓ Yes
PdfSignature with X509/PFX certificate support.
PDF/A & PDF/UA Compliance ✓ Yes
Documentation covers creating PDF/A and explains constraints (conversion from existing isn't automatic).
✓ Yes
Native PDF/A archival and PDF/UA accessibility compliance for enterprise use.
Platform & Deployment
Cross-Platform Support ✓ Yes
.NET Standard 2.0 / .NET Framework 4.6.1 — runs on .NET 6+ across OSes.
✓ Yes
Windows, Linux, macOS, x64, x86, ARM. .NET 6–10, Core, Standard 2.0+, Framework 4.6.2+.
Server / Docker / Cloud ~ Complex
Core install requires multiple packages (iText + Bouncy Castle adapter); add-ons (pdfHTML/pdfOCR) add further dependency/compliance steps.
✓ Yes
Docker, Azure, AWS, IIS. Official Docker images and deployment guides.
Ease of Setup ~ Complex
Core install requires multiple packages (Bouncy Castle adapter); HTML/OCR require additional add-ons and sometimes native deps.
✓ Simple
Single Install-Package IronPdf NuGet command. Ready in minutes.
Licensing & Support
Licensing Model ~ Complex
Dual-license: AGPLv3 (source-disclosure obligations for network use) or commercial. AGPL can be restrictive for proprietary apps.
✓ Commercial
Perpetual licenses. 30-day fully functional free trial, no watermarks.
Commercial Support & SLA ✓ Yes
iText site includes commercial licensing + support agreements as part of its licensing model.
✓ 24/5 Support
Dedicated engineering support with guaranteed SLA — email, live chat, phone.
Documentation ✓ Yes
Installation guides, knowledge base articles, and API references available (core + add-ons).
✓ Extensive
Full API reference, 100+ how-tos, tutorials, code examples, troubleshooting, videos.

Data sourced from official iText documentation, PDF Association listing, and NuGet package references.
iText7 is powerful but carries AGPL licensing complexity and multi-package setup overhead.
IronPDF delivers full coverage with simpler setup — try free for 30 days.

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:

  1. Create, read, and manipulate PDF documents
  2. Add digital signatures to PDF documents
  3. Fill out and flatten interactive PDF forms
  4. Add tags to PDF documents
  5. Create maps and books
  6. Add bookmarks, page numbers, watermarks, and other features to existing PDF documents
  7. It supports PDF documents in compliance with:
    • PDF specifications including PDF 2.0 (ISO 32000-2)
    • PDF/A (ISO 19005; 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.

// Import iText7 libraries
using iText.Kernel.Pdf;
using iText.Layout;
using iText.Layout.Element;

// Create a writer instance with the destination file path
var writer = new PdfWriter("destination.pdf");

// Create a PdfDocument instance which uses the writer
var pdf = new PdfDocument(writer);

// Create a Document instance for high-level manipulation
var document = new Document(pdf);

// Add a paragraph with "Hello World!" text
document.Add(new Paragraph("Hello World!"));

// Close the document to ensure changes are saved
document.Close();
// Import iText7 libraries
using iText.Kernel.Pdf;
using iText.Layout;
using iText.Layout.Element;

// Create a writer instance with the destination file path
var writer = new PdfWriter("destination.pdf");

// Create a PdfDocument instance which uses the writer
var pdf = new PdfDocument(writer);

// Create a Document instance for high-level manipulation
var document = new Document(pdf);

// Add a paragraph with "Hello World!" text
document.Add(new Paragraph("Hello World!"));

// Close the document to ensure changes are saved
document.Close();
$vbLabelText   $csharpLabel

Explanation:

  • PdfWriter: This object is responsible for writing the PDF file. It acts on a file path and writes the structures required for a valid PDF document.
  • PdfDocument: Communicates with the PdfWriter and manages the content and data structure in accordance with PDF standards.
  • Document: Provides high-level abstraction to handle content addition. It allows adding various PDF components like paragraphs, tables, etc.
  • Paragraph: Represents a text area to be inserted into the document.
  • The Close() method is crucial as it ensures all content is flushed and the file is correctly completed.

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 iText 7 license and pricing page. 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 with comprehensive features which provides all the mentioned features in a single library with a reasonable commercial license? The answer is Yes.

IronPDF

Explore IronPDF Features and Capabilities is a .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:

  1. Generate PDF from HTML, String, URL, Razor, ASPX, and MVC view
  2. Extract images, tables, and text without using any other library
  3. Convert images such as scanned documents into PDF and vice versa
  4. It provides functions for adding page numbers, custom headers and footers, digital signatures, file attachments, password protection and security measures
  5. It provides high performance by providing full multithreading capabilities and async processing support
  6. Other 50+ features which we cannot list here
  7. Compatible with all .NET languages such as C#, VB.NET, and F#.
  8. Compatible with all .NET versions including .NET Standard, .NET Core, .NET 5, 6, & 7.
  9. Discover IronPDF for Java which also provides all the above-mentioned features and is compatible with Java, Kotlin, and Scala.
  10. Supports every operating system including Windows, Linux, and Mac operating systems.
  11. 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 of IronPDF 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 an 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 the 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.

Please noteiText Group is a registered trademark of its respective owner. This site is not affiliated with, endorsed by, or sponsored by iText Group. All product names, logos, and brands are property of their respective owners. Comparisons are for informational purposes only and reflect publicly available information at the time of writing.

Frequently Asked Questions

What is the iText PDF library?

The iText PDF library is a Java and .NET library designed for creating and manipulating PDF files. It offers various functionalities like digital signatures and PDF/A compliance, and is known for its products such as iText 7 Suite.

Why might a developer choose IronPDF over iText?

A developer might choose IronPDF over iText for its streamlined experience that integrates comprehensive PDF functionalities within a single library. IronPDF offers a straightforward licensing process and is cost-effective compared to iText.

How can I convert HTML to PDF in C# or Java?

You can use IronPDF's RenderHtmlAsPdf method to convert HTML strings into PDFs. This library simplifies the process by supporting HTML to PDF conversion without needing additional libraries.

What are the advantages of using IronPDF for PDF manipulation?

IronPDF provides an all-in-one solution for PDF manipulation, supporting features like HTML to PDF conversion, image and text extraction, and multithreading capabilities. It is compatible with all .NET languages and versions, as well as Java.

Is there a commercial license required for IronPDF?

Yes, a commercial license is required for production use of IronPDF. Pricing ranges from 749 USD to 2999 USD and includes 24/7 support, making it an accessible option for businesses.

How does IronPDF simplify the PDF creation process?

IronPDF simplifies the PDF creation process by providing all necessary functionalities within a single library. This eliminates the need for multiple libraries, reducing complexity and enhancing performance.

What are the licensing differences between IronPDF and iText?

IronPDF offers transparent pricing and an easy purchase process, while iText requires contacting sales for a quote. IronPDF's licensing also includes full support, whereas iText's commercial licenses can be costly.

Curtis Chau
Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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