How to Convert PDF to PDF/A-1b in .NET Core?

The Syncfusion Essential PDF is a .NET Core PDF library used to create, read, and edit PDF documents. Using this library, you can convert PDF to PDF/A-1b, PDF/A-2b, and PDF/A3-b in ASP.NET Core.

Steps to convert PDF to PDF/A-1b document in ASP.NET Core using C#

1. Create a new ASP.NET Core console application.

2. Install the Syncfusion.Pdf.Imaging.Net.Core NuGet package as a reference to your .NET Core project from NuGet.org.

3. Install the SkiaSharp NuGet package as a reference to your .NET Core project from NuGet.org.

4. Include the following namespaces in the Program.cs file.

   using SkiaSharp;
   using Syncfusion.Pdf;
   using Syncfusion.Pdf.Graphics;
   using Syncfusion.Pdf.Parsing;
   using System.IO;
   

5. Include the following code sample to convert PDF to PDF/A-1b using C#.

   //Load an existing PDF document.
   FileStream docStream = new FileStream(@"../../../Input.pdf", FileMode.Open, FileAccess.Read);
   PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);
   //Sample level font event handling.
   loadedDocument.SubstituteFont += LoadedDocument_SubstituteFont;
   //Convert the loaded document into PDF/A document.
   loadedDocument.ConvertToPDFA(PdfConformanceLevel.Pdf_A1B);
   MemoryStream stream = new MemoryStream();
   //Save the document.
   loadedDocument.Save(stream);
   stream.Position = 0;
   FileStream filestream = new FileStream("../../../Output.pdf", FileMode.OpenOrCreate, FileAccess.ReadWrite);
   stream.WriteTo(filestream);
   //Close the document.
   loadedDocument.Close(true);
   

//Substitute the non-embedded fonts.
static void LoadedDocument_SubstituteFont(object sender, PdfFontEventArgs args)
{
//Get the font name.
 
string fontName = args.FontName.Split(',')[0];
 
//Get the font style.
 
PdfFontStyle fontStyle = args.FontStyle;
 
SKFontStyle sKFontStyle = SKFontStyle.Normal;
 
if (fontStyle != PdfFontStyle.Regular)
{
if (fontStyle == PdfFontStyle.Bold)
{
sKFontStyle = SKFontStyle.Bold;
}
else if (fontStyle == PdfFontStyle.Italic)
{
sKFontStyle = SKFontStyle.Italic;
}
else if (fontStyle == (PdfFontStyle.Italic | PdfFontStyle.Bold))
{
sKFontStyle = SKFontStyle.BoldItalic;
}
}
SKTypeface typeface = SKTypeface.FromFamilyName(fontName, sKFontStyle);
 
SKStreamAsset typeFaceStream = typeface.OpenStream();
 
MemoryStream memoryStream = null;
 
if (typeFaceStream != null && typeFaceStream.Length > 0)
{
//Create a fontData from the type face stream.
byte[] fontData = new byte[typeFaceStream.Length - 1];
typeFaceStream.Read(fontData, typeFaceStream.Length);
typeFaceStream.Dispose();
//Create a new memory stream from the font data.
memoryStream = new MemoryStream(fontData);
}
//Set the font stream to the event args.
args.FontStream = memoryStream;
}

6. By executing the program, you will get the PDF document as follows.

A complete work sample can be downloaded from PDFToPDFA1b_Sample.zip.

Take a moment to peruse the documentation. You will also find other options like create PDF/A-1b and PDF/X-1a document and features like converting Word to PDF, Excel to PDF, and HTML to PDF with code examples.

Refer to this link to explore the rich set of Syncfusion Essential PDF features.

An online sample link to convert PDF to PDF/A-1b standard document.

Also see:

https://help.syncfusion.com/file-formats/pdf/working-with-pdf-conformance

https://www.syncfusion.com/kb/9515/how-to-convert-pdf-to-pdf-a-1b-using-c-and-vb-net

Conclusion

I hope you enjoyed learning how to convert PDF to PDF/A-1b in .NET Core.

You can refer to our ASP.NET Core PDF feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our ASP.NET Core PDF example to understand how to create and manipulate data. For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls. If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!