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iTextsharp HTML to PDF With CSS Styles C# Example vs IronPDF

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Converting HTML to PDF is a crucial task in many modern software development workflows, whether it's for generating reports, invoices, or creating documentation. As a C# developer, you have several libraries at your disposal to streamline this process.

In this article, we'll compare two of the most popular libraries within the .NET ecosystem: IronPDF and iTextSharp. Both libraries offer robust functionality, but they differ in key areas such as ease of use, PDF creation tools, CSS styling support, and licensing. Whether you're a beginner or a seasoned developer, this guide will help you understand their core features and decide which one is the best fit for you based off your needs and project requirements.

Want to follow along? Download the IronPDF free trial to explore IronPDF's powerful features for yourself.

Comparing Top Libraries: iTextSharp and IronPDF

Both iTextSharp and IronPDF provide developers with the tools they need for HTML to PDF conversion in C#. However, each has its own strengths and weaknesses.

  • iTextSharp is an open-source library that has been around for a long time. It offers flexibility and extensive customization options, but it can be somewhat complex to set up and use, especially when dealing with advanced HTML and CSS rendering. However, it should be noted that iTextSharp is a legacy product and only receives security-related updates now.

  • IronPDF, on the other hand, is a commercial product developed by Iron Software. It is known for its user-friendly interface, robust CSS support, and ease of use. It integrates seamlessly with C# applications, making it an excellent choice for developers who need fast and efficient PDF generation without sacrificing quality.

Before we dive into how to convert HTML to PDF format with these two libraries, let's first look at a basic example comparison which shows the difference in how these two libraries handle converting CSS and JavaScript-heavy web page/HTML content into a PDF document.

iTextSharp vs IronPDF URL to PDF

As you can see from the resulting PDF documents, this demonstrates how iTextSharp can only process the raw HTML content from the provided URL, whereas IronPDF is capable of maintaining the original CSS layout and styling, ensuring the generated PDF document closely resembles the original web page.

Step-by-Step Installation Guide

Setting Up iTextSharp

  1. Install via NuGet Console: To begin using iTextSharp, you can install it directly from NuGet. Open your Visual Studio project, go to the NuGet Package Manager, and run the following command:
Install-Package iTextSharp

Installing iTextSharp via the NuGet Console

  1. Install via NuGet Package Manager: Alternatively, you can install it via the NuGet package manager for the Solution screen. To do this, navigate to "Tools > NuGet Package Manager > Manage NuGet Packages for Solution".

Tools dropdown menu

Then, search for the iTextSharp library and click "Install".

iTextSharp NuGet screen

  1. Add References: Once installed, add the necessary references in your project, particularly those related to HTML to PDF conversion.
using iTextSharp.text.pdf;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text.pdf;
using iTextSharp.text.html.simpleparser;
$vbLabelText   $csharpLabel

Setting Up IronPDF

  1. Install via NuGet Console: To begin using IronPDF, you can install it directly from NuGet. Open your Visual Studio project, go to the NuGet Package Manager, and run the following command:
Install-Package IronPdf

  1. Install via NuGet Package Manager: Alternatively, you can install it via the NuGet package manager for the Solution screen just as we did in the steps above for iTextSharp. However, this time, search for IronPDF, before clicking "Install".

    IronPDF's NuGet screen

  2. Add References: Once installed, import IronPDF into your project:
using IronPdf;
using IronPdf;
$vbLabelText   $csharpLabel

It is important to remember that IronPDF requires a license key for commercial use/use outside of development.

Implementing HTML to PDF Conversion

Using iTextSharp

Once iTextSharp is set up, ensure you have the itextsharp.xmlworker package installed within your project before you can start to create PDFs from HTML content. However, you'll face challenges with more complex HTML, especially when CSS styles are involved. iTextSharp tends to require additional effort to achieve perfect styling when compared to IronPDF. It's important to remember that iTextSharp handles basic HTML/CSS2 only (no flexbox, no grid, limited CSS).

using System;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.tool.xml;

// Register provider for specific code pages
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

// Define HTML content with CSS styling
string html = @"
<html>
<head>
  <style>
    body { font-family: Arial; color: #333; }
    h1 { background: #3498db; color: #fff; padding: 10px; }
    table { width: 100%; border-collapse: collapse; margin-top: 15px; }
    th, td { border: 1px solid #ccc; padding: 6px; }
    th { background: #2980b9; color: #fff; }
    .footer { margin-top: 20px; font-size: 12px; color: #777; text-align: center; }
  </style>
</head>
<body>
  <h1>April Report</h1>
  <p>Here’s a quick overview of this month’s performance metrics.</p>
  <table>
    <tr><th>Metric</th><th>Value</th></tr>
    <tr><td>Features</td><td>12</td></tr>
    <tr><td>Bugs Fixed</td><td>89</td></tr>
  </table>
  <p class='footer'>Generated by iTextSharp</p>
</body>
</html>";

// Create PDF from HTML content
using (FileStream stream = new FileStream("report.pdf", FileMode.Create))
{
    Document pdfDoc = new Document(PageSize.A4, 25, 25, 30, 30);
    PdfWriter writer = PdfWriter.GetInstance(pdfDoc, stream);
    pdfDoc.Open();
    using (StringReader sr = new StringReader(html))
    {
        // Use XMLWorkerHelper to parse and add HTML content to the PDF document
        XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr);
    }
    pdfDoc.Close();
    writer.Close();
}
Console.WriteLine("PDF generation completed successfully.");
using System;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.tool.xml;

// Register provider for specific code pages
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

// Define HTML content with CSS styling
string html = @"
<html>
<head>
  <style>
    body { font-family: Arial; color: #333; }
    h1 { background: #3498db; color: #fff; padding: 10px; }
    table { width: 100%; border-collapse: collapse; margin-top: 15px; }
    th, td { border: 1px solid #ccc; padding: 6px; }
    th { background: #2980b9; color: #fff; }
    .footer { margin-top: 20px; font-size: 12px; color: #777; text-align: center; }
  </style>
</head>
<body>
  <h1>April Report</h1>
  <p>Here’s a quick overview of this month’s performance metrics.</p>
  <table>
    <tr><th>Metric</th><th>Value</th></tr>
    <tr><td>Features</td><td>12</td></tr>
    <tr><td>Bugs Fixed</td><td>89</td></tr>
  </table>
  <p class='footer'>Generated by iTextSharp</p>
</body>
</html>";

// Create PDF from HTML content
using (FileStream stream = new FileStream("report.pdf", FileMode.Create))
{
    Document pdfDoc = new Document(PageSize.A4, 25, 25, 30, 30);
    PdfWriter writer = PdfWriter.GetInstance(pdfDoc, stream);
    pdfDoc.Open();
    using (StringReader sr = new StringReader(html))
    {
        // Use XMLWorkerHelper to parse and add HTML content to the PDF document
        XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr);
    }
    pdfDoc.Close();
    writer.Close();
}
Console.WriteLine("PDF generation completed successfully.");
$vbLabelText   $csharpLabel

Output PDF File

iTextSharp HTML to PDF output

Using IronPDF

IronPDF simplifies the PDF generation process, able to easily convert HTML content into new PDF documents in just a few lines of code, as demonstrated in the code sample below. It's capable of working with advanced HTML documents with CSS files used for styling, HTML strings, and CSS/JavaScript-heavy web content.

Here's a simple example that includes inline CSS:

using IronPdf;

class Program
{
    static void Main()
    {
        // Define HTML content with inline CSS styling
        var content = @"
        <html>
        <head>
            <style>
                body {
                    font-family: 'Segoe UI', sans-serif;
                    margin: 40px;
                    background-color: #f8f9fa;
                }
                h1 {
                    color: #2c3e50;
                    border-bottom: 2px solid #2980b9;
                    padding-bottom: 10px;
                }
                table {
                    width: 100%;
                    border-collapse: collapse;
                    margin-top: 20px;
                }
                table, th, td {
                    border: 1px solid #ccc;
                }
                th {
                    background-color: #2980b9;
                    color: white;
                    padding: 10px;
                }
                td {
                    padding: 10px;
                    background-color: #ecf0f1;
                }
                .footer {
                    margin-top: 40px;
                    text-align: center;
                    font-size: 0.9em;
                    color: #7f8c8d;
                }
                img {
                    width: 120px;
                    float: right;
                }
            </style>
        </head>
        <body>
            <img src='https://ironpdf.com/img/svgs/iron-pdf-logo.svg' alt='Company Logo' />
            <h1>Monthly Report - April 2025</h1>
            <p>This report outlines performance statistics and key updates for the development team.</p>

            <table>
                <tr>
                    <th>Metric</th>
                    <th>Value</th>
                    <th>Change</th>
                </tr>
                <tr>
                    <td>Feature Releases</td>
                    <td>12</td>
                    <td style='color: green;'>+20%</td>
                </tr>
                <tr>
                    <td>Bugs Resolved</td>
                    <td>89</td>
                    <td style='color: green;'>+45%</td>
                </tr>
                <tr>
                    <td>Downtime</td>
                    <td>2 hrs</td>
                    <td style='color: red;'>+15%</td>
                </tr>
            </table>

            <div class='footer'>
                Generated with IronPDF | © 2025 DevCorp
            </div>
        </body>
        </html>";

        // Use ChromePdfRenderer to render the HTML content as a PDF
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(content);
        pdf.SaveAs("AdvancedStyledReport.pdf");
    }
}
using IronPdf;

class Program
{
    static void Main()
    {
        // Define HTML content with inline CSS styling
        var content = @"
        <html>
        <head>
            <style>
                body {
                    font-family: 'Segoe UI', sans-serif;
                    margin: 40px;
                    background-color: #f8f9fa;
                }
                h1 {
                    color: #2c3e50;
                    border-bottom: 2px solid #2980b9;
                    padding-bottom: 10px;
                }
                table {
                    width: 100%;
                    border-collapse: collapse;
                    margin-top: 20px;
                }
                table, th, td {
                    border: 1px solid #ccc;
                }
                th {
                    background-color: #2980b9;
                    color: white;
                    padding: 10px;
                }
                td {
                    padding: 10px;
                    background-color: #ecf0f1;
                }
                .footer {
                    margin-top: 40px;
                    text-align: center;
                    font-size: 0.9em;
                    color: #7f8c8d;
                }
                img {
                    width: 120px;
                    float: right;
                }
            </style>
        </head>
        <body>
            <img src='https://ironpdf.com/img/svgs/iron-pdf-logo.svg' alt='Company Logo' />
            <h1>Monthly Report - April 2025</h1>
            <p>This report outlines performance statistics and key updates for the development team.</p>

            <table>
                <tr>
                    <th>Metric</th>
                    <th>Value</th>
                    <th>Change</th>
                </tr>
                <tr>
                    <td>Feature Releases</td>
                    <td>12</td>
                    <td style='color: green;'>+20%</td>
                </tr>
                <tr>
                    <td>Bugs Resolved</td>
                    <td>89</td>
                    <td style='color: green;'>+45%</td>
                </tr>
                <tr>
                    <td>Downtime</td>
                    <td>2 hrs</td>
                    <td style='color: red;'>+15%</td>
                </tr>
            </table>

            <div class='footer'>
                Generated with IronPDF | © 2025 DevCorp
            </div>
        </body>
        </html>";

        // Use ChromePdfRenderer to render the HTML content as a PDF
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(content);
        pdf.SaveAs("AdvancedStyledReport.pdf");
    }
}
$vbLabelText   $csharpLabel

Output PDF File

IronPDF HTML to PDF output

With IronPDF, you can expect a polished PDF file with accurate CSS styling, as seen with the above code example, making it a go-to for many developers working with complex HTML files, strings, and more. Beyond simple HTML to PDF document conversion tasks, IronPDF is capable of advanced PDF manipulation tasks and PDF security. This makes it an excellent all-in-one PDF library.

Key Differences and Competitor Landscape

When evaluating iTextSharp and IronPDF, it's important to consider not just their features, but also the competitive landscape. Other competitors like Apryse and Aspose.PDF offer similar HTML to PDF solutions, but with their own trade-offs in terms of pricing and functionality.

Feature IronPDF iTextSharp Apryse Aspose.PDF
Ease of Use High Medium High Medium
CSS Support Full Partial Full Full
Licensing Commercial Open Source Commercial Commercial
Support Excellent Community Premium Premium
Pricing From $799 Free/Commercial license Quote-based From $1,679 per year

IronPDF stands out due to its comprehensive support for modern HTML5 and CSS3, which is critical for most developers today. Its extended support for manipulating PDF documents, control over PDF document creation, ease with the conversion process, and more, make IronPDF a popular PDF library.

Conclusion and Recommendations

In conclusion, both IronPDF and iTextSharp offer strong capabilities for HTML to PDF conversion in C#, but they cater to different types of developers. If you’re looking for an open-source solution with strong community support, iTextSharp may be the right choice. However, for developers who need ease of use, robust CSS support, and a commercial solution, IronPDF offers a far more streamlined and feature-rich experience. Whether you're looking for a tool that can automate generating invoices, create branded PDF documents, or convert entire web pages to PDF files, IronPDF has you covered.

Try IronPDF’s user-friendly features today – download the free trial for a firsthand experience and see how easy HTML to PDF conversion can be.

참고해 주세요iTextSharp is a registered trademark of its respective owner. This site is not affiliated with, endorsed by, or sponsored by iTextSharp. 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.

자주 묻는 질문

C#에서 HTML을 PDF로 변환하려면 어떻게 해야 하나요?

IronPDF를 사용하여 HTML 문자열의 경우 RenderHtmlAsPdf 메서드를, HTML 파일의 경우 RenderHtmlFileAsPdf를 사용하여 HTML을 PDF로 변환할 수 있습니다. 이 라이브러리는 최신 HTML5와 CSS3를 지원하여 정확한 스타일링과 렌더링을 보장합니다.

HTML을 PDF로 변환할 때 IronPDF를 사용하면 어떤 주요 이점이 있나요?

IronPDF는 최신 HTML5 및 CSS3를 강력하게 지원하므로 복잡한 웹 콘텐츠를 처리하는 데 이상적입니다. 사용자 친화적인 API를 통해 C#과 원활하게 통합할 수 있으며 JavaScript가 많은 콘텐츠도 지원하므로 동적 웹 페이지를 정확하게 변환할 수 있습니다.

개발자가 IronPDF 대신 iTextSharp를 선택하는 이유는 무엇인가요?

유연한 사용자 지정 옵션이 있는 오픈 소스 솔루션을 선호하는 개발자는 iTextSharp를 선택할 수 있습니다. 현재 iText7로 알려진 iTextSharp는 특히 고급 HTML 및 CSS가 관련된 경우 복잡성을 처리할 수 있는 전문성을 갖춘 개발자에게 적합합니다.

IronPDF는 HTML 콘텐츠의 JavaScript를 처리할 수 있나요?

예, IronPDF는 고급 렌더링 기능으로 HTML 콘텐츠 내에서 JavaScript를 처리할 수 있으므로 동적 및 대화형 웹 페이지를 PDF로 변환하는 데 적합한 선택입니다.

C# 프로젝트에 IronPDF를 설치하려면 어떻게 하나요?

IronPDF는 Visual Studio의 NuGet 패키지 관리자를 통해 설치할 수 있습니다. 패키지 관리자 콘솔에서 Install-Package IronPdf 명령을 사용하거나 NuGet 패키지 관리자 UI에서 IronPDF를 검색하세요.

IronPDF와 iTextSharp 중에서 선택할 때 고려해야 할 사항은 무엇인가요?

둘 중 하나를 선택할 때는 사용 편의성, CSS 및 JavaScript 지원, 라이선스 요구 사항, HTML 콘텐츠의 복잡성 등을 고려하세요. IronPDF는 최신 웹 기술과 원활한 통합에 탁월하며, iTextSharp는 오픈 소스 솔루션을 선호하는 사람들에게 좋은 선택입니다.

IronPDF에 대한 라이선스 요구 사항이 있나요?

예, IronPDF는 개발 환경 이외의 곳에서 사용하려면 상용 라이선스가 필요합니다. 라이선스는 필요한 지원 수준과 기능에 따라 구매할 수 있습니다.

ITextSharp로 HTML을 PDF로 변환할 때 흔히 발생하는 문제는 무엇인가요?

ITextSharp의 일반적인 문제로는 추가 구성 및 사용자 지정이 필요할 수 있는 복잡한 HTML 및 CSS를 처리하는 것이 포함됩니다. 개발자는 고급 웹 콘텐츠의 적절한 스타일과 렌더링을 보장하기 위해 코드를 조정해야 하는 경우가 많습니다.

IronPDF와 다른 PDF 라이브러리(예: Aspose.PDF)와 비교했을 때 어떤 점이 다른가요?

IronPDF는 Aspose.PDF와 마찬가지로 사용이 간편하고 최신 웹 표준에 대한 포괄적인 지원을 제공합니다. 경쟁력 있는 가격과 기능 세트로 품질과 성능을 유지하면서 안정적인 HTML에서 PDF로의 변환이 필요한 개발자에게 강력한 선택이 될 수 있습니다.

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