How to Export PDF/A, PDF/A-3, or PDF/A-4 Format Documents in C#

using IronPdf;

// Create a PdfDocument object or open any PDF File
PdfDocument pdf = PdfDocument.FromFile("wikipedia.pdf");

// Use the SaveAsPdfA method to save to file
pdf.SaveAsPdfA("pdf-a3-wikipedia.pdf", PdfAVersions.PdfA3b);

using IronPdf;

// Use the Chrome Renderer to make beautiful HTML designs
var chromeRenderer = new ChromePdfRenderer();

// Render an HTML design as a PdfDocument object using Chrome
PdfDocument pdf = chromeRenderer.RenderHtmlAsPdf("design.html");

// Use the SaveAsPdfA method to save to file
pdf.SaveAsPdfA("design-accessible.pdf", PdfAVersions.PdfA3b);

using IronPdf;

// Use the Chrome Renderer to make beautiful HTML designs from URLs
var chromeRenderer = new ChromePdfRenderer();

// Render a Website as a PdfDocument object using Chrome
PdfDocument pdf = chromeRenderer.RenderUrlAsPdf("https://www.microsoft.com");

// Use the SaveAsPdfA method to save to file
pdf.SaveAsPdfA("website-accessible.pdf", PdfAVersions.PdfA3b);

using IronPdf;
using System.Collections.Generic;

PdfDocument pdf = new PdfDocument("Google.pdf");

// Initialize collection of embed file as string of path
IEnumerable<string> embedPaths = new[] { "File1.xml", "File2.png" };

// Convert to Pdf/A-3B with embeded files
pdf.ConvertToPdfA(embedPaths);

using IronPdf;
using System.Collections.Generic;
using System.IO;


PdfDocument pdf = new PdfDocument("Google.pdf");

// Initialize collection of embed file as Bytes and their file type
byte[] fileData1 = File.ReadAllBytes("File1.png");
byte[] fileData2 = File.ReadAllBytes("File2.xml");

var embedFileConfig1 = new EmbedFileConfiguration(EmbedFileType.png);
embedFileConfig1.EmbedFileName = "logo.png";

var embedFileConfig2 = new EmbedFileConfiguration(EmbedFileType.xml)
{
    EmbedFileName = "supportSystem.xml",
    AFDesc = "Internal system",
    ConformanceLevel = ConformanceLevel.XRECHNUNG,
    SchemaNamespace = SchemaNamespace.Zugferd1,
    SchemaPrefix = SchemaPrefix.rsm,
    PropertyVersion = PropertyVersion.v1p0,
    AFRelationship = AFRelationship.Supplement,
};

IEnumerable<EmbedFileByte> embedBytes = new[]
{
    new EmbedFileByte(fileData1, embedFileConfig1),
    new EmbedFileByte(fileData2, embedFileConfig2)
};

// Convert to Pdf/A-3B with embeded files
pdf.ConvertToPdfA(embedBytes).SaveAs("PdfACompliance.pdf");

using IronPdf;
using System.Collections.Generic;
using System.IO;

PdfDocument pdf = new PdfDocument("Google.pdf");

// Initialize collection of embed file as Stream and their file type
Stream stream1 = new MemoryStream(File.ReadAllBytes("File1.png"));
Stream stream2 = new MemoryStream(File.ReadAllBytes("File2.xml"));

var embedFileConfig1 = new EmbedFileConfiguration(EmbedFileType.png);
embedFileConfig1.EmbedFileName = "logo.png";

var embedFileConfig2 = new EmbedFileConfiguration(EmbedFileType.xml)
{
    EmbedFileName = "supportSystem.xml",
    AFDesc = "Internal system",
    ConformanceLevel = ConformanceLevel.XRECHNUNG,
    SchemaNamespace = SchemaNamespace.Zugferd1,
    SchemaPrefix = SchemaPrefix.rsm,
    PropertyVersion = PropertyVersion.v1p0,
    AFRelationship = AFRelationship.Supplement,
};

IEnumerable<EmbedFileStream> embedStreams = new[]
{
    new EmbedFileStream(stream1, embedFileConfig1),
    new EmbedFileStream(stream2, embedFileConfig2)
};

// Convert to Pdf/A-3B with embeded files
pdf.ConvertToPdfA(embedStreams).SaveAs("PdfACompliance.pdf");

var config = new EmbedFileConfiguration
{
    EmbedFileName = "Attachment.xml",
    AFDesc = "Associated File Description",
    ConformanceLevel = ConformanceLevel.EN16931,
    SchemaNamespace = SchemaNamespace.facturX,
    SchemaPrefix = SchemaPrefix.fx,
    PropertyVersion = PropertyVersion.v1,
    AFRelationship = AFRelationship.Alternative
};

 // Load a PDF document
 var document = PdfDocument.FromFile("wikipedia.pdf");

 // Configure embedded file parameters
 document.EmbedFileFromFilePath("path/to/attachment", config);

 // Save the document as PDF/A-3b
 document.SaveAsPdfA3B("output-with-configured-attachment.pdf");

using IronPdf;

// Load the environmental impact assessment document
PdfDocument pdf = PdfDocument.FromFile("ENV-2026-1847-Assessment-Report.pdf");

// Save as PDF/A-4 compliant document for long-term archival
pdf.SaveAsPdfA("ENV-2026-1847-Report-PDFA4Compliant.pdf", PdfAVersions.PdfA4);