How to Convert JPG to PDF .NET with C#

How Can I Convert a JPG File to a PDF Document in C#?

Converting a single JPG file to a PDF document requires just one method call with IronPDF's ImageToPdfConverter class. This image to PDF converter handles the entire conversion process automatically, preserving image quality while generating a properly formatted PDF file that meets PDF/A compliance standards for long-term archival.

using IronPdf;

// Convert a single JPG image to PDF with error handling
try 
{
    // Initialize the converter with enterprise-grade settings
    PdfDocument pdf = ImageToPdfConverter.ImageToPdf("inputImage.jpg");

    // Add metadata for compliance tracking
    pdf.MetaData.Author = "Enterprise System";
    pdf.MetaData.CreationDate = DateTime.Now;
    pdf.MetaData.Keywords = "JPG-Conversion,Compliance-Ready";

    // Apply security settings for sensitive documents
    pdf.SecuritySettings.AllowUserPrinting = true;
    pdf.SecuritySettings.AllowUserEditing = false;
    pdf.SecuritySettings.AllowUserCopyPasteContent = false;

    // Save the converted PDF to disk
    pdf.SaveAs("output.pdf");
}
catch (Exception ex)
{
    // Log for audit trail
    Console.WriteLine($"Conversion failed: {ex.Message}");
}

using IronPdf;

// Convert a single JPG image to PDF with error handling
try 
{
    // Initialize the converter with enterprise-grade settings
    PdfDocument pdf = ImageToPdfConverter.ImageToPdf("inputImage.jpg");

    // Add metadata for compliance tracking
    pdf.MetaData.Author = "Enterprise System";
    pdf.MetaData.CreationDate = DateTime.Now;
    pdf.MetaData.Keywords = "JPG-Conversion,Compliance-Ready";

    // Apply security settings for sensitive documents
    pdf.SecuritySettings.AllowUserPrinting = true;
    pdf.SecuritySettings.AllowUserEditing = false;
    pdf.SecuritySettings.AllowUserCopyPasteContent = false;

    // Save the converted PDF to disk
    pdf.SaveAs("output.pdf");
}
catch (Exception ex)
{
    // Log for audit trail
    Console.WriteLine($"Conversion failed: {ex.Message}");
}

The converter integrates seamlessly with your existing logging infrastructure, enabling comprehensive audit trails for compliance reporting. For enterprise deployments requiring high availability, consider implementing asynchronous conversion patterns to handle concurrent requests efficiently.

How Do I Convert Multiple JPG Images Into One PDF File?

Combining multiple JPG files into a single PDF document is essential for creating consolidated reports, archiving batches of scanned documents, or assembling multi-page compliance packages. The JPG to PDF converter accepts an array of file paths, merging all images into a single PDF with each image on its own page while maintaining proper page numbering.

using IronPdf;

// Define multiple JPG images to convert with validation
string[] jpgImages = { "page1.jpg", "page2.jpeg", "page3.jpg" };

// Validate all files exist before processing
foreach (var imagePath in jpgImages)
{
    if (!File.Exists(imagePath))
    {
        throw new FileNotFoundException($"Required image not found: {imagePath}");
    }
}

// Convert all images into a single PDF document
PdfDocument pdf = ImageToPdfConverter.ImageToPdf(jpgImages);

// Add headers for document identification
pdf.AddHtmlHeaders(new HtmlHeaderFooter()
{
    HtmlFragment = "<div style='text-align:center'>Confidential - {date}</div>",
    Height = 25
});

// Apply compression for optimal file size
pdf.CompressImages(70);

// Save the combined PDF
pdf.SaveAs("combined-document.pdf");

using IronPdf;

// Define multiple JPG images to convert with validation
string[] jpgImages = { "page1.jpg", "page2.jpeg", "page3.jpg" };

// Validate all files exist before processing
foreach (var imagePath in jpgImages)
{
    if (!File.Exists(imagePath))
    {
        throw new FileNotFoundException($"Required image not found: {imagePath}");
    }
}

// Convert all images into a single PDF document
PdfDocument pdf = ImageToPdfConverter.ImageToPdf(jpgImages);

// Add headers for document identification
pdf.AddHtmlHeaders(new HtmlHeaderFooter()
{
    HtmlFragment = "<div style='text-align:center'>Confidential - {date}</div>",
    Height = 25
});

// Apply compression for optimal file size
pdf.CompressImages(70);

// Save the combined PDF
pdf.SaveAs("combined-document.pdf");

This approach lets you convert multiple JPG images in the desired order while maintaining document integrity; simply arrange the file paths in your array accordingly. The PDF converter works efficiently even with large batches of JPG pictures, processing hundreds of images in seconds on modern hardware with proper memory management.

For enterprise scenarios such as invoice processing, medical record digitization, or legal document archival, you can enumerate image files in a directory and pass them directly to the converter. This enables automated workflows that convert JPG to PDF without manual intervention, supporting HIPAA-compliant workflows with appropriate security controls.

What Image Formats Does the JPG to PDF Converter Support?

IronPDF's image to PDF tool supports multiple image formats beyond JPG and JPEG, providing flexibility for diverse enterprise requirements. You can convert PNG, BMP, GIF, and TIFF files using the same straightforward API, ensuring your application can handle whatever image formats your business processes require.

using IronPdf;

// Convert various image formats with format-specific handling
public class EnterpriseImageConverter
{
    public static PdfDocument ConvertImageToPdf(string imagePath)
    {
        string extension = Path.GetExtension(imagePath).ToLower();
        PdfDocument pdf = null;

        switch (extension)
        {
            case ".png":
                // PNG with transparency support
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;

            case ".tiff":
            case ".tif":
                // Multi-page TIFF support
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;

            case ".bmp":
                // Legacy BMP format
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;

            default:
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;
        }

        // Apply enterprise standards
        pdf.MetaData.Producer = "Enterprise Document System v2.0";
        return pdf;
    }
}

using IronPdf;

// Convert various image formats with format-specific handling
public class EnterpriseImageConverter
{
    public static PdfDocument ConvertImageToPdf(string imagePath)
    {
        string extension = Path.GetExtension(imagePath).ToLower();
        PdfDocument pdf = null;

        switch (extension)
        {
            case ".png":
                // PNG with transparency support
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;

            case ".tiff":
            case ".tif":
                // Multi-page TIFF support
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;

            case ".bmp":
                // Legacy BMP format
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;

            default:
                pdf = ImageToPdfConverter.ImageToPdf(imagePath);
                break;
        }

        // Apply enterprise standards
        pdf.MetaData.Producer = "Enterprise Document System v2.0";
        return pdf;
    }
}

How Can I Preserve Image Quality in the Converted PDF?

Maintaining image quality during PDF conversion is critical for professional documents, especially in industries with strict visual fidelity requirements like healthcare imaging or engineering drawings. IronPDF preserves the original resolution of your JPG images by default, ensuring no degradation occurs during the conversion process while supporting lossless compression options.

using IronPdf;

// High-quality conversion with preservation settings
public static void ConvertWithQualityPreservation(string imagePath, string outputPath)
{
    // Convert image maintaining original quality
    PdfDocument pdf = ImageToPdfConverter.ImageToPdf(imagePath);

    // Configure for archival quality
    var printOptions = new PdfPrintOptions()
    {
        DPI = 300,
        PrinterName = "Microsoft Print to PDF"
    };

    // Apply linearization for fast web viewing
    pdf.SaveAsLinearized(outputPath);
}

using IronPdf;

// High-quality conversion with preservation settings
public static void ConvertWithQualityPreservation(string imagePath, string outputPath)
{
    // Convert image maintaining original quality
    PdfDocument pdf = ImageToPdfConverter.ImageToPdf(imagePath);

    // Configure for archival quality
    var printOptions = new PdfPrintOptions()
    {
        DPI = 300,
        PrinterName = "Microsoft Print to PDF"
    };

    // Apply linearization for fast web viewing
    pdf.SaveAsLinearized(outputPath);
}

For scenarios where you need to balance file size against image quality for cloud storage optimization, IronPDF provides granular compression controls that let you reduce the converted PDF size while controlling quality trade-offs. You can also rotate PDF pages if your source images have incorrect orientation from scanning processes.

The PDF converter works with high-resolution photos and scanned documents without imposing arbitrary limits, unlike free service alternatives that may compress or add watermarks to your output. This ensures your digitally signed documents maintain their legal validity.

How Do I Customize Page Size and Orientation?

Controlling the output PDF format gives you flexibility for different enterprise use cases, from standard letter-size reports to custom forms. IronPDF allows you to specify page dimensions and orientation when creating a new PDF document from images, supporting both standard paper sizes and custom dimensions.

using IronPdf;

// Create renderer with enterprise-standard settings
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Configure for standard business documents
renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;
renderer.RenderingOptions.PaperOrientation = IronPdf.Rendering.PdfPaperOrientation.Portrait;
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;
renderer.RenderingOptions.MarginLeft = 20;
renderer.RenderingOptions.MarginRight = 20;

// Apply corporate branding
renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter()
{
    HtmlFragment = "<img src='corporate-logo.png' style='height:30px'/>",
    Height = 40
};

// Convert image using HTML wrapper for custom sizing
string imageHtml = @"
    <html>
    <body style='margin:0'>
        <img src='wide-photo.jpg' style='width:100%; max-width:100%'/>
    </body>
    </html>";

PdfDocument pdf = renderer.RenderHtmlAsPdf(imageHtml);

// Add page numbers for multi-page documents
pdf.AddTextFooters("{page} of {total-pages}", IronPdf.Font.FontFamily.Arial, 10);

pdf.SaveAs("formatted-document.pdf");

using IronPdf;

// Create renderer with enterprise-standard settings
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Configure for standard business documents
renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;
renderer.RenderingOptions.PaperOrientation = IronPdf.Rendering.PdfPaperOrientation.Portrait;
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;
renderer.RenderingOptions.MarginLeft = 20;
renderer.RenderingOptions.MarginRight = 20;

// Apply corporate branding
renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter()
{
    HtmlFragment = "<img src='corporate-logo.png' style='height:30px'/>",
    Height = 40
};

// Convert image using HTML wrapper for custom sizing
string imageHtml = @"
    <html>
    <body style='margin:0'>
        <img src='wide-photo.jpg' style='width:100%; max-width:100%'/>
    </body>
    </html>";

PdfDocument pdf = renderer.RenderHtmlAsPdf(imageHtml);

// Add page numbers for multi-page documents
pdf.AddTextFooters("{page} of {total-pages}", IronPdf.Font.FontFamily.Arial, 10);

pdf.SaveAs("formatted-document.pdf");

Why Choose IronPDF for Enterprise JPG to PDF Conversion?

IronPDF transforms JPG to PDF .NET development from a complex task into a simple, reliable operation with enterprise-grade security and compliance features. The library handles single images, multiple JPG files, and various image formats with consistent, high-quality results, without relying on external online services that could compromise data sovereignty.

Unlike PDF converter drag-and-drop websites, IronPDF gives you programmatic control for automated document workflows, batch processing, and enterprise integration with full API documentation. The converter processes images efficiently while maintaining quality and audit trails, making it ideal for applications ranging from healthcare document management to financial compliance systems.

Key enterprise benefits include:

• On-premise deployment for complete data control
• SOC2 Type II compliance with security documentation
• Support for PDF/A archival and PDF/UA accessibility
• Integration with existing Active Directory authentication
• 24/5 enterprise support with dedicated management

Start your free trial to experience how IronPDF simplifies image to PDF conversion in your .NET projects with enterprise-grade security, or purchase a license for production deployment with volume discounts available.