IronPDF vs ExpertPDF: Which C# PDF Library Should Senior .NET Developers Choose?

What Are the Key Features of IronPDF?

What Are the Key Features of ExpertPDF?

Notable features include:

• Convert URL webpages to PDF
• Convert HTML strings to PDF
• Multiple output file options
• Set page margins and size
• Set headers and footers
• Add automatic and custom page breaks
• Convert specific webpage parts to PDF
• Hide elements during conversion
• Merge multiple webpages into single PDFs
• Convert authenticated webpages to PDF
• Select CSS media type for rendering
• Bookmarks support
• Digital signing support
• Retrieve HTML element positions in PDF
• Support for HTML5/CSS3
• Support for web fonts
• File Type Conversions:
  • PDF to Text Converter
  • HTML to PDF Converter
  • HTML to Image Converter
  • PDF to Image Converter
  • RTF to PDF Converter

The following sections cover:

1. Create a Console Project
2. IronPDF Installation
3. ExpertPDF Installation
4. Create PDF from a URL
5. Create PDF from HTML Input String
6. Merge Multiple PDFs into Single PDF
7. Convert Images to PDF
8. Licensing and Pricing
9. Conclusion

How Do I Install Using Visual Studio?

Visual Studio provides NuGet Package Manager for installing packages:

• Access through Project Menu Tools, or

• Right-click the project in Solution Explorer

  

  

Browse for IronPDF NuGet package and install. Refer to the NuGet installation guide for more details. Platform-specific guides include Android integration, F# development, and VB.NET usage. For troubleshooting deployment, see failed to deploy NuGet package guide.

How Do I Download the NuGet Package Directly?

Download IronPDF from the NuGet website:

• Visit NuGet IronPDF Package
• Select "Download Package"
• Double-click the downloaded package
• The package installs automatically
• Reload Visual Studio

How Do I Download and Install the IronPDF DLL?

Download the IronPDF .DLL directly from IronPDF website. Click Download IronPDF DLL.

Reference IronPDF in the project:

• Right-click Solution in Solution Explorer
• Select "Add Reference"
• Browse for IronPDF.dll library
• Click OK

IronPDF installation is complete. For additional options including Docker deployment and remote engine setup, refer to the installation overview. For troubleshooting, see quick troubleshooting guide or explore initial render performance and GPU process optimization. The runtimes folder guide helps with dependency management.

How Do I Install Using Visual Studio NuGet Package Manager?

Access NuGet Package Manager:

• Project Menu Tools

• Right-click project in Solution Explorer

  

  

Browse for ExpertPDF NuGet package and install. For improve setup, consider IronPDF's using declaration guide.

Note: ExpertPDF supports only Windows, while IronPDF supports Windows, Linux, and macOS. For cloud deployments, IronPDF offers Azure integration and AWS Lambda support. IronPDF provides complete performance optimization and memory management guidance. For specific platforms, see Red Hat Enterprise Linux support and AWS Lambda on Amazon Linux 2.

How Does IronPDF Convert URL to PDF?

IronPDF renders HTML from URLs as PDF efficiently. The library provides high-level support for CSS, JavaScript, images, and Forms. Using Chrome rendering engine ensures pixel-perfect HTML to PDF conversion. For rendering issues, see pixel-perfect HTML formatting guide. Advanced rendering options include custom paper sizes and viewport configuration. The JavaScript message listener enables dynamic content handling.

This code example shows how IronPDF allows developers to create PDFs from website URLs:

// Import the IronPdf library
using IronPdf;

// Initialize a new renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();
// Render the specified URL as a PDF
var pdf = renderer.RenderUrlAsPdf("___PROTECTED_URL_190___");
// Save the rendered PDF to a file
pdf.SaveAs("url.pdf");

// Import the IronPdf library
using IronPdf;

// Initialize a new renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();
// Render the specified URL as a PDF
var pdf = renderer.RenderUrlAsPdf("___PROTECTED_URL_190___");
// Save the rendered PDF to a file
pdf.SaveAs("url.pdf");

For authenticated URLs, see TLS website and system logins guide. Configure cookies and custom HTTP headers for authenticated requests. Secure sites may require Kerberos authentication. For debugging, use Chrome debugging guide. Additional examples show converting URLs to PDF.

How Does ExpertPDF Convert URL to PDF?

ExpertPDF converts URLs using savePdfFromUrlToFile method, preserving page formatting:

// Import the ExpertPdf.HtmlToPdf namespace
using ExpertPdf.HtmlToPdf;

// Initialize a new PdfConverter
PdfConverter pdfConverter = new PdfConverter();
// Use PdfConverter to save a webpage URL directly to a PDF file
pdfConverter.SavePdfFromUrlToFile("___PROTECTED_URL_191___", "output.pdf");

// Import the ExpertPdf.HtmlToPdf namespace
using ExpertPdf.HtmlToPdf;

// Initialize a new PdfConverter
PdfConverter pdfConverter = new PdfConverter();
// Use PdfConverter to save a webpage URL directly to a PDF file
pdfConverter.SavePdfFromUrlToFile("___PROTECTED_URL_191___", "output.pdf");

Behind the scenes, IronPDF use its Chrome rendering engine to provide better HTML5 and CSS3 support.

How Does IronPDF Convert HTML String to PDF?

This code example shows how IronPDF allows developers to generate PDF documents from HTML strings:

// Import the IronPdf library
using IronPdf;

// Initialize a new renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();
// Render a PDF from HTML string and save it
var pdfDoc1 = renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>");
pdfDoc1.SaveAs("pixel-perfect.pdf");

// Render HTML with external assets and save it
var pdfDoc2 = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
pdfDoc2.SaveAs("html-with-assets.pdf");

// Import the IronPdf library
using IronPdf;

// Initialize a new renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();
// Render a PDF from HTML string and save it
var pdfDoc1 = renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>");
pdfDoc1.SaveAs("pixel-perfect.pdf");

// Render HTML with external assets and save it
var pdfDoc2 = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
pdfDoc2.SaveAs("html-with-assets.pdf");

IronPDF supports base URLs for relative paths and DataURIs for embedding images. For complex HTML, see HTML file to PDF guide. For specific viewports, refer to the viewport and zoom settings guide. The library handles international languages and UTF-8 seamlessly. Advanced features include HTML rendering settings and responsive HTML to PDF conversion.

How Does ExpertPDF Convert HTML String to PDF?

ExpertPDF HTML To PDF converter supports HTML string conversion:

// Import the ExpertPdf.HtmlToPdf namespace
using ExpertPdf.HtmlToPdf;

// Initialize a new PdfConverter
PdfConverter pdfConverter = new PdfConverter();
// Use PdfConverter to save an HTML string to a PDF file
pdfConverter.SavePdfFromHtmlStringToFile("<h1>PDF using Expert PDF</h1>", "html-to-pdf.pdf");

// Import the ExpertPdf.HtmlToPdf namespace
using ExpertPdf.HtmlToPdf;

// Initialize a new PdfConverter
PdfConverter pdfConverter = new PdfConverter();
// Use PdfConverter to save an HTML string to a PDF file
pdfConverter.SavePdfFromHtmlStringToFile("<h1>PDF using Expert PDF</h1>", "html-to-pdf.pdf");

The first argument specifies HTML string, the second specifies output filename. Consider using IronPDF's Unicode and UTF-8 support in place of basic HTML rendering for far greater international language support.

How Can I Generate Technical Documentation PDFs?

Technical documentation benefits from structured layouts with code examples. This Bootstrap 5 demonstration shows IronPDF's ability to render documentation with syntax highlighting and alerts. Refer to the Bootstrap and Flexbox CSS support guide for more details. IronPDF supports font management and font kerning for professional typography. For improve results, check fonts troubleshooting guide and international languages support.

using IronPdf;

var renderer = new ChromePdfRenderer();

string technicalDocs = @"
<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'>
    <link href='___PROTECTED_URL_192___ rel='stylesheet'>
    <style>
        .code-block { background: #f8f9fa; border-left: 3px solid #0d6efd; padding: 15px; border-radius: 4px; }
        .api-method { font-family: 'Courier New', monospace; color: #0d6efd; }
        @media print { .card, .alert { page-break-inside: avoid; } }
    </style>
</head>
<body class='bg-light'>
    <div class='container py-4'>
        <div class='card shadow-sm mb-4'>
            <div class='card-header bg-dark text-white'>
                <h2>API Reference - HTML to PDF Conversion</h2>
            </div>
            <div class='card-body'>
                <h4>RenderHtmlAsPdf() Method</h4>
                <p class='lead'>Converts HTML content to PDF with full CSS3 and JavaScript support.</p>

                <div class='code-block mb-3'>
                    <code class='api-method'>PdfDocument RenderHtmlAsPdf(string htmlContent)</code>
                </div>

                <div class='row mt-4'>
                    <div class='col-md-6'>
                        <h5>Parameters</h5>
                        <table class='table table-sm table-bordered'>
                            <tr>
                                <td><code>htmlContent</code></td>
                                <td>String containing HTML to convert</td>
                            </tr>
                        </table>
                    </div>
                    <div class='col-md-6'>
                        <h5>Returns</h5>
                        <table class='table table-sm table-bordered'>
                            <tr>
                                <td><code>PdfDocument</code></td>
                                <td>Generated PDF document object</td>
                            </tr>
                        </table>
                    </div>
                </div>
            </div>
        </div>

        <div class='row g-3 mb-4'>
            <div class='col-md-4'>
                <div class='alert alert-success mb-0'>
                    <h6>✓ Supported Features</h6>
                    <ul class='mb-0 small'>
                        <li>HTML5 semantic tags</li>
                        <li>CSS3 with Flexbox/Grid</li>
                        <li>JavaScript execution</li>
                        <li>External stylesheets</li>
                    </ul>
                </div>
            </div>
            <div class='col-md-4'>
                <div class='alert alert-info mb-0'>
                    <h6>ⓘ Rendering Engine</h6>
                    <ul class='mb-0 small'>
                        <li>Chrome V8 Engine</li>
                        <li>98% browser fidelity</li>
                        <li>Sub-second rendering</li>
                        <li>Async/await support</li>
                    </ul>
                </div>
            </div>
            <div class='col-md-4'>
                <div class='alert alert-warning mb-0'>
                    <h6>⚠ ExpertPDF Notes</h6>
                    <ul class='mb-0 small'>
                        <li>Complex API structure</li>
                        <li>Limited CSS3 support</li>
                        <li>No native JavaScript</li>
                        <li>Requires configuration</li>
                    </ul>
                </div>
            </div>
        </div>

        <div class='card shadow-sm'>
            <div class='card-header bg-primary text-white'>
                <h5>Code Example Comparison</h5>
            </div>
            <div class='card-body'>
                <div class='row'>
                    <div class='col-md-6'>
                        <h6>IronPDF (Simple)</h6>
                        <div class='code-block'>
                            <pre class='mb-0'><code>var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("output.pdf");</code></pre>
                        </div>
                        <div class='badge bg-success mt-2'>3 Lines</div>
                    </div>
                    <div class='col-md-6'>
                        <h6>ExpertPDF (Complex)</h6>
                        <div class='code-block'>
                            <pre class='mb-0'><code>var converter = new HtmlToPdfConverter();
converter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4;
converter.NavigationTimeout = 60;
byte[] result = converter.GetPdfBytesFromHtmlString(html);
File.WriteAllBytes("output.pdf", result);</code></pre>
                        </div>
                        <div class='badge bg-warning text-dark mt-2'>5+ Lines</div>
                    </div>
                </div>
            </div>
            <div class='card-footer text-muted'>
                <small><strong>Comparison:</strong> IronPDF provides a more intuitive API with less configuration overhead for common use cases.</small>
            </div>
        </div>
    </div>
</body>
</html>";

var pdf = renderer.RenderHtmlAsPdf(technicalDocs);
pdf.SaveAs("technical-documentation.pdf");

using IronPdf;

var renderer = new ChromePdfRenderer();

string technicalDocs = @"
<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'>
    <link href='___PROTECTED_URL_192___ rel='stylesheet'>
    <style>
        .code-block { background: #f8f9fa; border-left: 3px solid #0d6efd; padding: 15px; border-radius: 4px; }
        .api-method { font-family: 'Courier New', monospace; color: #0d6efd; }
        @media print { .card, .alert { page-break-inside: avoid; } }
    </style>
</head>
<body class='bg-light'>
    <div class='container py-4'>
        <div class='card shadow-sm mb-4'>
            <div class='card-header bg-dark text-white'>
                <h2>API Reference - HTML to PDF Conversion</h2>
            </div>
            <div class='card-body'>
                <h4>RenderHtmlAsPdf() Method</h4>
                <p class='lead'>Converts HTML content to PDF with full CSS3 and JavaScript support.</p>

                <div class='code-block mb-3'>
                    <code class='api-method'>PdfDocument RenderHtmlAsPdf(string htmlContent)</code>
                </div>

                <div class='row mt-4'>
                    <div class='col-md-6'>
                        <h5>Parameters</h5>
                        <table class='table table-sm table-bordered'>
                            <tr>
                                <td><code>htmlContent</code></td>
                                <td>String containing HTML to convert</td>
                            </tr>
                        </table>
                    </div>
                    <div class='col-md-6'>
                        <h5>Returns</h5>
                        <table class='table table-sm table-bordered'>
                            <tr>
                                <td><code>PdfDocument</code></td>
                                <td>Generated PDF document object</td>
                            </tr>
                        </table>
                    </div>
                </div>
            </div>
        </div>

        <div class='row g-3 mb-4'>
            <div class='col-md-4'>
                <div class='alert alert-success mb-0'>
                    <h6>✓ Supported Features</h6>
                    <ul class='mb-0 small'>
                        <li>HTML5 semantic tags</li>
                        <li>CSS3 with Flexbox/Grid</li>
                        <li>JavaScript execution</li>
                        <li>External stylesheets</li>
                    </ul>
                </div>
            </div>
            <div class='col-md-4'>
                <div class='alert alert-info mb-0'>
                    <h6>ⓘ Rendering Engine</h6>
                    <ul class='mb-0 small'>
                        <li>Chrome V8 Engine</li>
                        <li>98% browser fidelity</li>
                        <li>Sub-second rendering</li>
                        <li>Async/await support</li>
                    </ul>
                </div>
            </div>
            <div class='col-md-4'>
                <div class='alert alert-warning mb-0'>
                    <h6>⚠ ExpertPDF Notes</h6>
                    <ul class='mb-0 small'>
                        <li>Complex API structure</li>
                        <li>Limited CSS3 support</li>
                        <li>No native JavaScript</li>
                        <li>Requires configuration</li>
                    </ul>
                </div>
            </div>
        </div>

        <div class='card shadow-sm'>
            <div class='card-header bg-primary text-white'>
                <h5>Code Example Comparison</h5>
            </div>
            <div class='card-body'>
                <div class='row'>
                    <div class='col-md-6'>
                        <h6>IronPDF (Simple)</h6>
                        <div class='code-block'>
                            <pre class='mb-0'><code>var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("output.pdf");</code></pre>
                        </div>
                        <div class='badge bg-success mt-2'>3 Lines</div>
                    </div>
                    <div class='col-md-6'>
                        <h6>ExpertPDF (Complex)</h6>
                        <div class='code-block'>
                            <pre class='mb-0'><code>var converter = new HtmlToPdfConverter();
converter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4;
converter.NavigationTimeout = 60;
byte[] result = converter.GetPdfBytesFromHtmlString(html);
File.WriteAllBytes("output.pdf", result);</code></pre>
                        </div>
                        <div class='badge bg-warning text-dark mt-2'>5+ Lines</div>
                    </div>
                </div>
            </div>
            <div class='card-footer text-muted'>
                <small><strong>Comparison:</strong> IronPDF provides a more intuitive API with less configuration overhead for common use cases.</small>
            </div>
        </div>
    </div>
</body>
</html>";

var pdf = renderer.RenderHtmlAsPdf(technicalDocs);
pdf.SaveAs("technical-documentation.pdf");

Output: A professional technical documentation PDF with Bootstrap 5 cards, alerts, tables, and code blocks. IronPDF accurately renders all typography, spacing utilities, and grid layouts, demonstrating superior documentation generation capabilities.

How Can I Create Financial Reports with Complex Layouts?

Financial reporting requires precise table formatting and calculations. This example demonstrates IronPDF's complex financial layout rendering with CSS Grid and dynamic JavaScript. Refer to the JavaScript in PDFs guide including custom JavaScript execution for more details. Financial documents may need PDF compression for file optimization and metadata management for compliance. The rendering charts in PDFs guide helps with data visualization.

using IronPdf;

var renderer = new ChromePdfRenderer();
// Enable JavaScript for dynamic calculations
renderer.RenderingOptions.EnableJavaScript = true;
renderer.RenderingOptions.RenderDelay = 500; // Allow JS to execute

string financialReport = @"
<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'>
    <style>
        @page { size: A4; margin: 20mm; }
        body { font-family: Arial, sans-serif; line-height: 1.6; }
        .header { text-align: center; margin-bottom: 30px; }
        .financial-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 10px; margin-bottom: 20px; }
        .grid-header { background: #2c3e50; color: white; padding: 10px; font-weight: bold; }
        .grid-row { padding: 10px; border-bottom: 1px solid #ddd; }
        .grid-row:hover { background: #f9f9f9; }
        .amount { text-align: right; font-family: 'Courier New', monospace; }
        .positive { color: #27ae60; }
        .negative { color: #e74c3c; }
        .total-row { background: #ecf0f1; font-weight: bold; margin-top: 10px; }
        .footer-note { font-size: 0.8em; color: #666; margin-top: 30px; text-align: center; }
        @media print { 
            .grid-row:hover { background: transparent; }
            .financial-grid { page-break-inside: avoid; }
        }
    </style>
</head>
<body>
    <div class='header'>
        <h1>Quarterly Financial Report</h1>
        <p>Q4 2023 - Consolidated Statement</p>
    </div>

    <div class='financial-grid'>
        <div class='grid-header'>Revenue Stream</div>
        <div class='grid-header amount'>Q3 2023</div>
        <div class='grid-header amount'>Q4 2023</div>

        <div class='grid-row'>Software Licenses</div>
        <div class='grid-row amount'>$2,150,000</div>
        <div class='grid-row amount positive'>$2,875,000</div>

        <div class='grid-row'>Support Services</div>
        <div class='grid-row amount'>$850,000</div>
        <div class='grid-row amount positive'>$975,000</div>

        <div class='grid-row'>Consulting</div>
        <div class='grid-row amount'>$425,000</div>
        <div class='grid-row amount negative'>$380,000</div>

        <div class='grid-row total-row'>Total Revenue</div>
        <div class='grid-row total-row amount'>$3,425,000</div>
        <div class='grid-row total-row amount positive' id='total'>$4,230,000</div>
    </div>

    <div class='financial-grid'>
        <div class='grid-header'>Operating Expenses</div>
        <div class='grid-header amount'>Q3 2023</div>
        <div class='grid-header amount'>Q4 2023</div>

        <div class='grid-row'>R&D</div>
        <div class='grid-row amount'>$1,200,000</div>
        <div class='grid-row amount'>$1,350,000</div>

        <div class='grid-row'>Sales & Marketing</div>
        <div class='grid-row amount'>$800,000</div>
        <div class='grid-row amount'>$950,000</div>

        <div class='grid-row'>General & Admin</div>
        <div class='grid-row amount'>$400,000</div>
        <div class='grid-row amount'>$425,000</div>

        <div class='grid-row total-row'>Total Expenses</div>
        <div class='grid-row total-row amount'>$2,400,000</div>
        <div class='grid-row total-row amount'>$2,725,000</div>
    </div>

    <script>
        // Calculate growth percentage
        const q3Total = 3425000;
        const q4Total = 4230000;
        const growth = ((q4Total - q3Total) / q3Total * 100).toFixed(1);

        // Add growth indicator
        const totalEl = document.getElementById('total');
        totalEl.innerHTML += ` <small>(+${growth}%)</small>`;
    </script>

    <div class='footer-note'>
        <p>This report was generated using IronPDF's advanced rendering engine.<br>
        All financial figures are in USD. Report generated on: <span id='date'></span></p>
    </div>

    <script>
        document.getElementById('date').textContent = new Date().toLocaleDateString();
    </script>
</body>
</html>";

var pdf = renderer.RenderHtmlAsPdf(financialReport);
pdf.SaveAs("financial-report.pdf");

using IronPdf;

var renderer = new ChromePdfRenderer();
// Enable JavaScript for dynamic calculations
renderer.RenderingOptions.EnableJavaScript = true;
renderer.RenderingOptions.RenderDelay = 500; // Allow JS to execute

string financialReport = @"
<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'>
    <style>
        @page { size: A4; margin: 20mm; }
        body { font-family: Arial, sans-serif; line-height: 1.6; }
        .header { text-align: center; margin-bottom: 30px; }
        .financial-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 10px; margin-bottom: 20px; }
        .grid-header { background: #2c3e50; color: white; padding: 10px; font-weight: bold; }
        .grid-row { padding: 10px; border-bottom: 1px solid #ddd; }
        .grid-row:hover { background: #f9f9f9; }
        .amount { text-align: right; font-family: 'Courier New', monospace; }
        .positive { color: #27ae60; }
        .negative { color: #e74c3c; }
        .total-row { background: #ecf0f1; font-weight: bold; margin-top: 10px; }
        .footer-note { font-size: 0.8em; color: #666; margin-top: 30px; text-align: center; }
        @media print { 
            .grid-row:hover { background: transparent; }
            .financial-grid { page-break-inside: avoid; }
        }
    </style>
</head>
<body>
    <div class='header'>
        <h1>Quarterly Financial Report</h1>
        <p>Q4 2023 - Consolidated Statement</p>
    </div>

    <div class='financial-grid'>
        <div class='grid-header'>Revenue Stream</div>
        <div class='grid-header amount'>Q3 2023</div>
        <div class='grid-header amount'>Q4 2023</div>

        <div class='grid-row'>Software Licenses</div>
        <div class='grid-row amount'>$2,150,000</div>
        <div class='grid-row amount positive'>$2,875,000</div>

        <div class='grid-row'>Support Services</div>
        <div class='grid-row amount'>$850,000</div>
        <div class='grid-row amount positive'>$975,000</div>

        <div class='grid-row'>Consulting</div>
        <div class='grid-row amount'>$425,000</div>
        <div class='grid-row amount negative'>$380,000</div>

        <div class='grid-row total-row'>Total Revenue</div>
        <div class='grid-row total-row amount'>$3,425,000</div>
        <div class='grid-row total-row amount positive' id='total'>$4,230,000</div>
    </div>

    <div class='financial-grid'>
        <div class='grid-header'>Operating Expenses</div>
        <div class='grid-header amount'>Q3 2023</div>
        <div class='grid-header amount'>Q4 2023</div>

        <div class='grid-row'>R&D</div>
        <div class='grid-row amount'>$1,200,000</div>
        <div class='grid-row amount'>$1,350,000</div>

        <div class='grid-row'>Sales & Marketing</div>
        <div class='grid-row amount'>$800,000</div>
        <div class='grid-row amount'>$950,000</div>

        <div class='grid-row'>General & Admin</div>
        <div class='grid-row amount'>$400,000</div>
        <div class='grid-row amount'>$425,000</div>

        <div class='grid-row total-row'>Total Expenses</div>
        <div class='grid-row total-row amount'>$2,400,000</div>
        <div class='grid-row total-row amount'>$2,725,000</div>
    </div>

    <script>
        // Calculate growth percentage
        const q3Total = 3425000;
        const q4Total = 4230000;
        const growth = ((q4Total - q3Total) / q3Total * 100).toFixed(1);

        // Add growth indicator
        const totalEl = document.getElementById('total');
        totalEl.innerHTML += ` <small>(+${growth}%)</small>`;
    </script>

    <div class='footer-note'>
        <p>This report was generated using IronPDF's advanced rendering engine.<br>
        All financial figures are in USD. Report generated on: <span id='date'></span></p>
    </div>

    <script>
        document.getElementById('date').textContent = new Date().toLocaleDateString();
    </script>
</body>
</html>";

var pdf = renderer.RenderHtmlAsPdf(financialReport);
pdf.SaveAs("financial-report.pdf");

This code example shows how IronPDF allows developers to use CSS Grid layouts, JavaScript execution, and print-specific CSS. Add custom headers and footers to reports, implement backgrounds and foregrounds for branding, watermarks for security, and digital signatures for authentication. Refer to the generate PDF reports guide for more details.

How Does IronPDF Merge PDF Files?

This code example shows how IronPDF allows developers to render two PDFs from HTML strings and merge them. The straightforward approach offers additional settings options. For page numbers and page breaks in merged documents, see respective guides. Also copy pages between PDFs for granular control. For forms, see form management and edit forms documentation. The page numbers and page breaks example shows combined implementation.

// Import the IronPdf library
using IronPdf;

// Define HTML strings to convert to PDF
var htmlA = @"<p> [PDF_A] </p>
        <p> [PDF_A] 1st Page </p>
        <div style='page-break-after: always;'></div>
        <p> [PDF_A] 2nd Page</p>";

var htmlB = @"<p> [PDF_B] </p>
        <p> [PDF_B] 1st Page </p>
        <div style='page-break-after: always;'></div>
        <p> [PDF_B] 2nd Page</p>";

// Initialize a new renderer
var renderer = new ChromePdfRenderer();

// Render HTML strings as PDFs
var pdfDocA = renderer.RenderHtmlAsPdf(htmlA);
var pdfDocB = renderer.RenderHtmlAsPdf(htmlB);

// Merge the PDF documents
var mergedPdf = PdfDocument.Merge(pdfDocA, pdfDocB);

// Save the merged PDF
mergedPdf.SaveAs("Merged.pdf");

// Import the IronPdf library
using IronPdf;

// Define HTML strings to convert to PDF
var htmlA = @"<p> [PDF_A] </p>
        <p> [PDF_A] 1st Page </p>
        <div style='page-break-after: always;'></div>
        <p> [PDF_A] 2nd Page</p>";

var htmlB = @"<p> [PDF_B] </p>
        <p> [PDF_B] 1st Page </p>
        <div style='page-break-after: always;'></div>
        <p> [PDF_B] 2nd Page</p>";

// Initialize a new renderer
var renderer = new ChromePdfRenderer();

// Render HTML strings as PDFs
var pdfDocA = renderer.RenderHtmlAsPdf(htmlA);
var pdfDocB = renderer.RenderHtmlAsPdf(htmlB);

// Merge the PDF documents
var mergedPdf = PdfDocument.Merge(pdfDocA, pdfDocB);

// Save the merged PDF
mergedPdf.SaveAs("Merged.pdf");

The Merge method accepts multiple documents as Enumerable objects. See IronPDF Code Example for Merging PDFs. For adding cover pages or creating table of contents, see specialized guides. Also stamp new content or add attachments. The split a PDF and extract pages example demonstrates reverse operations.

Note that merged PDFs containing editable forms have form field names appended with index numbers. Refer to the form data handling guide for more details.

How Does ExpertPDF Merge PDF Files?

ExpertPDF uses a Merge PDF component requiring separate installation. The AppendPDFFile method appends files to PDFMerge objects:

// Import the ExpertPdf.MergePdf namespace
using ExpertPdf.MergePdf;

// Initialize a new PDFMerge object
PDFMerge pdfMerge = new PDFMerge();
// Append PDF files to the merge object
pdfMerge.AppendPDFFile("output.pdf");
pdfMerge.AppendPDFFile("html-to-pdf.pdf");
// Save the merged PDF to a file
pdfMerge.SaveMergedPDFToFile("merged.pdf");

// Import the ExpertPdf.MergePdf namespace
using ExpertPdf.MergePdf;

// Initialize a new PDFMerge object
PDFMerge pdfMerge = new PDFMerge();
// Append PDF files to the merge object
pdfMerge.AppendPDFFile("output.pdf");
pdfMerge.AppendPDFFile("html-to-pdf.pdf");
// Save the merged PDF to a file
pdfMerge.SaveMergedPDFToFile("merged.pdf");

Behind the scenes, IronPDF use more efficient merging algorithms. Consider using IronPDF's async PDF generation and multi-threaded generation in place of synchronous operations for far greater performance.

How Can I Implement Advanced PDF Merging with Document Organization?

Enterprise applications require advanced features like bookmarks, page organization, and metadata preservation when merging PDFs. This example demonstrates bookmark management, metadata handling, and document organization. For compliance, implement revision history, PDF/A conversion, and PDF/UA accessibility. The outlines & bookmarks example provides additional implementation details. Refer to the set & edit metadata guide and metadata visibility troubleshooting for more details.

using IronPdf;
using System.Collections.Generic;
using System.Linq;

public class AdvancedPdfMerger
{
    public static void MergeDocumentsWithBookmarks()
    {
        var renderer = new ChromePdfRenderer();
        var documentsToMerge = new List<PdfDocument>();

        // Create chapter PDFs with proper structure
        string[] chapters = { "Introduction", "Technical Overview", "Implementation", "Conclusion" };

        foreach (var chapter in chapters)
        {
            string html = $@"
                <html>
                <head>
                    <style>
                        body {{ font-family: Georgia, serif; margin: 40px; }}
                        h1 {{ color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; }}
                        .chapter-number {{ color: #7f8c8d; font-size: 0.8em; }}
                    </style>
                </head>
                <body>
                    <h1><span class='chapter-number'>Chapter {Array.IndexOf(chapters, chapter) + 1}</span><br>{chapter}</h1>
                    <p>This is the content for the {chapter} chapter. In a real document, this would contain 
                    extensive content, diagrams, and detailed explanations.</p>
                    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor 
                    incididunt ut labore et dolore magna aliqua.</p>
                </body>
                </html>";

            var pdf = renderer.RenderHtmlAsPdf(html);

            // Add metadata to each chapter
            pdf.MetaData.Title = $"Chapter: {chapter}";
            pdf.MetaData.Author = "Technical Documentation Team";
            pdf.MetaData.Subject = "Enterprise PDF Generation";

            documentsToMerge.Add(pdf);
        }

        // Create a table of contents
        string tocHtml = @"
            <html>
            <head>
                <style>
                    body { font-family: Georgia, serif; margin: 40px; }
                    h1 { text-align: center; color: #2c3e50; margin-bottom: 40px; }
                    .toc-entry { margin: 15px 0; font-size: 1.1em; }
                    .toc-entry a { text-decoration: none; color: #3498db; }
                    .page-number { float: right; color: #7f8c8d; }
                </style>
            </head>
            <body>
                <h1>Table of Contents</h1>";

        int pageNumber = 2; // Starting after TOC page
        foreach (var chapter in chapters)
        {
            tocHtml += $@"
                <div class='toc-entry'>
                    <a href='#'>Chapter {Array.IndexOf(chapters, chapter) + 1}: {chapter}</a>
                    <span class='page-number'>{pageNumber}</span>
                </div>";
            pageNumber += 2; // Assuming each chapter is 2 pages
        }

        tocHtml += @"
            </body>
            </html>";

        var tocPdf = renderer.RenderHtmlAsPdf(tocHtml);

        // Merge all documents with TOC first
        var allDocuments = new List<PdfDocument> { tocPdf };
        allDocuments.AddRange(documentsToMerge);

        var finalPdf = PdfDocument.Merge(allDocuments);

        // Add bookmarks for navigation
        finalPdf.BookMarks.AddBookMarkAtStart("Table of Contents", 0);
        int currentPage = 1; // After TOC
        foreach (var chapter in chapters)
        {
            finalPdf.BookMarks.AddBookMarkAtStart($"Chapter {Array.IndexOf(chapters, chapter) + 1}: {chapter}", currentPage);
            currentPage += 2;
        }

        // Set document properties
        finalPdf.MetaData.Title = "Complete Technical Documentation";
        finalPdf.MetaData.Keywords = "IronPDF, Documentation, Enterprise, .NET";
        finalPdf.MetaData.CreationDate = System.DateTime.Now;

        // Add page numbers to footer
        finalPdf.AddTextFooters("Page {page} of {total-pages}", 
            new ChromePdfRenderer.ChromePdfRenderOptions() 
            { 
                MarginBottom = 20,
                MarginLeft = 50,
                MarginRight = 50
            });

        finalPdf.SaveAs("advanced-merged-document.pdf");
    }
}

using IronPdf;
using System.Collections.Generic;
using System.Linq;

public class AdvancedPdfMerger
{
    public static void MergeDocumentsWithBookmarks()
    {
        var renderer = new ChromePdfRenderer();
        var documentsToMerge = new List<PdfDocument>();

        // Create chapter PDFs with proper structure
        string[] chapters = { "Introduction", "Technical Overview", "Implementation", "Conclusion" };

        foreach (var chapter in chapters)
        {
            string html = $@"
                <html>
                <head>
                    <style>
                        body {{ font-family: Georgia, serif; margin: 40px; }}
                        h1 {{ color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; }}
                        .chapter-number {{ color: #7f8c8d; font-size: 0.8em; }}
                    </style>
                </head>
                <body>
                    <h1><span class='chapter-number'>Chapter {Array.IndexOf(chapters, chapter) + 1}</span><br>{chapter}</h1>
                    <p>This is the content for the {chapter} chapter. In a real document, this would contain 
                    extensive content, diagrams, and detailed explanations.</p>
                    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor 
                    incididunt ut labore et dolore magna aliqua.</p>
                </body>
                </html>";

            var pdf = renderer.RenderHtmlAsPdf(html);

            // Add metadata to each chapter
            pdf.MetaData.Title = $"Chapter: {chapter}";
            pdf.MetaData.Author = "Technical Documentation Team";
            pdf.MetaData.Subject = "Enterprise PDF Generation";

            documentsToMerge.Add(pdf);
        }

        // Create a table of contents
        string tocHtml = @"
            <html>
            <head>
                <style>
                    body { font-family: Georgia, serif; margin: 40px; }
                    h1 { text-align: center; color: #2c3e50; margin-bottom: 40px; }
                    .toc-entry { margin: 15px 0; font-size: 1.1em; }
                    .toc-entry a { text-decoration: none; color: #3498db; }
                    .page-number { float: right; color: #7f8c8d; }
                </style>
            </head>
            <body>
                <h1>Table of Contents</h1>";

        int pageNumber = 2; // Starting after TOC page
        foreach (var chapter in chapters)
        {
            tocHtml += $@"
                <div class='toc-entry'>
                    <a href='#'>Chapter {Array.IndexOf(chapters, chapter) + 1}: {chapter}</a>
                    <span class='page-number'>{pageNumber}</span>
                </div>";
            pageNumber += 2; // Assuming each chapter is 2 pages
        }

        tocHtml += @"
            </body>
            </html>";

        var tocPdf = renderer.RenderHtmlAsPdf(tocHtml);

        // Merge all documents with TOC first
        var allDocuments = new List<PdfDocument> { tocPdf };
        allDocuments.AddRange(documentsToMerge);

        var finalPdf = PdfDocument.Merge(allDocuments);

        // Add bookmarks for navigation
        finalPdf.BookMarks.AddBookMarkAtStart("Table of Contents", 0);
        int currentPage = 1; // After TOC
        foreach (var chapter in chapters)
        {
            finalPdf.BookMarks.AddBookMarkAtStart($"Chapter {Array.IndexOf(chapters, chapter) + 1}: {chapter}", currentPage);
            currentPage += 2;
        }

        // Set document properties
        finalPdf.MetaData.Title = "Complete Technical Documentation";
        finalPdf.MetaData.Keywords = "IronPDF, Documentation, Enterprise, .NET";
        finalPdf.MetaData.CreationDate = System.DateTime.Now;

        // Add page numbers to footer
        finalPdf.AddTextFooters("Page {page} of {total-pages}", 
            new ChromePdfRenderer.ChromePdfRenderOptions() 
            { 
                MarginBottom = 20,
                MarginLeft = 50,
                MarginRight = 50
            });

        finalPdf.SaveAs("advanced-merged-document.pdf");
    }
}

This advanced implementation demonstrates bookmark management, metadata handling, and page numbering. Refer to the organize PDFs tutorial for more details. Explore PDF compression techniques after merging. For security, implement password protection and encryption. The add classic text headers & footers example provides formatting options. For additional features, explore add page numbers and add a table of contents guides. The passwords, security & metadata example shows integrated implementation.

How Does IronPDF Convert Images to PDF?

Creating PDFs from images uses the ImageToPdfConverter class. Images load from any folder, supporting various formats including multi-page TIFF files. Also add images to existing PDFs or work with SVG graphics. For memory efficiency, use rasterize to images using MemoryStream. The custom PDF size example helps with layout control.

// Import the IronPdf namespace
using IronPdf;

// Specify the folder containing the image files
var imageFiles = System.IO.Directory.EnumerateFiles(@"C:\project\assets")
                  .Where(file => file.EndsWith(".jpg") || file.EndsWith(".jpeg"));

// Convert the images to a PDF document
var pdfDocument = ImageToPdfConverter.ImageToPdf(imageFiles);
// Save the PDF document
pdfDocument.SaveAs(@"C:\project\composite.pdf");

// Import the IronPdf namespace
using IronPdf;

// Specify the folder containing the image files
var imageFiles = System.IO.Directory.EnumerateFiles(@"C:\project\assets")
                  .Where(file => file.EndsWith(".jpg") || file.EndsWith(".jpeg"));

// Convert the images to a PDF document
var pdfDocument = ImageToPdfConverter.ImageToPdf(imageFiles);
// Save the PDF document
pdfDocument.SaveAs(@"C:\project\composite.pdf");

Beyond converting images to PDF, IronPDF converts scanned documents and business documents to images using rasterize to images. The library also extracts images from various file types. Refer to the rasterizing to images using MemoryStream guide for memory operations. For large images, consider ImageToPDF file size optimization. The portrait & landscape orientation example helps with page setup. For advanced image handling, see embedding bitmaps and images example.

How Can I Create Advanced Image to PDF Conversions with Layout Control?

For controlled image placement and professional layouts, this photo album example demonstrates embedding images and layout creation. For cloud storage, see Azure Blob Storage images guide. The set grayscale example shows image processing options:

using IronPdf;
using System.IO;

public class PhotoAlbumCreator
{
    public static void CreatePhotoAlbum(string imagesFolder, string outputPath)
    {
        var renderer = new ChromePdfRenderer();
        renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;
        renderer.RenderingOptions.MarginTop = 20;
        renderer.RenderingOptions.MarginBottom = 20;
        renderer.RenderingOptions.MarginLeft = 20;
        renderer.RenderingOptions.MarginRight = 20;

        string htmlContent = @"
            <!DOCTYPE html>
            <html>
            <head>
                <style>
                    body { font-family: Arial, sans-serif; }
                    .album-title { text-align: center; font-size: 2em; margin-bottom: 30px; color: #2c3e50; }
                    .photo-container { margin-bottom: 30px; text-align: center; page-break-inside: avoid; }
                    .photo { max-width: 100%; max-height: 500px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
                    .caption { margin-top: 10px; font-style: italic; color: #666; }
                    .page-break { page-break-after: always; }
                </style>
            </head>
            <body>
                <h1 class='album-title'>My Photo Album</h1>";

        var imageFiles = Directory.GetFiles(imagesFolder, "*.*")
            .Where(file => new[] { ".jpg", ".jpeg", ".png", ".gif" }
            .Contains(Path.GetExtension(file).ToLower()))
            .ToList();

        for (int i = 0; i < imageFiles.Count; i++)
        {
            string base64Image = Convert.ToBase64String(File.ReadAllBytes(imageFiles[i]));
            string fileName = Path.GetFileNameWithoutExtension(imageFiles[i]);

            htmlContent += $@"
                <div class='photo-container'>
                    <img class='photo' src='data:image/jpeg;base64,{base64Image}' alt='{fileName}'>
                    <div class='caption'>Photo {i + 1}: {fileName}</div>
                </div>";

            // Add page break every 2 photos
            if ((i + 1) % 2 == 0 && i < imageFiles.Count - 1)
            {
                htmlContent += "<div class='page-break'></div>";
            }
        }

        htmlContent += @"
                <div style='text-align: center; margin-top: 40px; color: #999;'>
                    <small>Created with IronPDF - Total Photos: " + imageFiles.Count + @"</small>
                </div>
            </body>
            </html>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs(outputPath);
    }
}

// Usage
PhotoAlbumCreator.CreatePhotoAlbum(@"C:\MyPhotos", @"C:\MyPhotoAlbum.pdf");

using IronPdf;
using System.IO;

public class PhotoAlbumCreator
{
    public static void CreatePhotoAlbum(string imagesFolder, string outputPath)
    {
        var renderer = new ChromePdfRenderer();
        renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;
        renderer.RenderingOptions.MarginTop = 20;
        renderer.RenderingOptions.MarginBottom = 20;
        renderer.RenderingOptions.MarginLeft = 20;
        renderer.RenderingOptions.MarginRight = 20;

        string htmlContent = @"
            <!DOCTYPE html>
            <html>
            <head>
                <style>
                    body { font-family: Arial, sans-serif; }
                    .album-title { text-align: center; font-size: 2em; margin-bottom: 30px; color: #2c3e50; }
                    .photo-container { margin-bottom: 30px; text-align: center; page-break-inside: avoid; }
                    .photo { max-width: 100%; max-height: 500px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
                    .caption { margin-top: 10px; font-style: italic; color: #666; }
                    .page-break { page-break-after: always; }
                </style>
            </head>
            <body>
                <h1 class='album-title'>My Photo Album</h1>";

        var imageFiles = Directory.GetFiles(imagesFolder, "*.*")
            .Where(file => new[] { ".jpg", ".jpeg", ".png", ".gif" }
            .Contains(Path.GetExtension(file).ToLower()))
            .ToList();

        for (int i = 0; i < imageFiles.Count; i++)
        {
            string base64Image = Convert.ToBase64String(File.ReadAllBytes(imageFiles[i]));
            string fileName = Path.GetFileNameWithoutExtension(imageFiles[i]);

            htmlContent += $@"
                <div class='photo-container'>
                    <img class='photo' src='data:image/jpeg;base64,{base64Image}' alt='{fileName}'>
                    <div class='caption'>Photo {i + 1}: {fileName}</div>
                </div>";

            // Add page break every 2 photos
            if ((i + 1) % 2 == 0 && i < imageFiles.Count - 1)
            {
                htmlContent += "<div class='page-break'></div>";
            }
        }

        htmlContent += @"
                <div style='text-align: center; margin-top: 40px; color: #999;'>
                    <small>Created with IronPDF - Total Photos: " + imageFiles.Count + @"</small>
                </div>
            </body>
            </html>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs(outputPath);
    }
}

// Usage
PhotoAlbumCreator.CreatePhotoAlbum(@"C:\MyPhotos", @"C:\MyPhotoAlbum.pdf");

This code example shows how IronPDF allows developers to implement embedding images with DataURIs, managing page breaks, and creating professional layouts. For cloud images, see Azure Blob Storage images guide. For large files, consider ImageToPDF file size optimization. Also scale PDF objects and translate PDF objects for precise positioning. The export PDFs to memory example helps with memory-efficient workflows. Refer to the adding HTML content efficiently guide for batch processing.