How to convert PDF to PDF/A-1b using C# and VB.NET
Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can convert PDF to PDF/A-1b using C# and VB.NET.
Steps to convert PDF to PDF/A-1b programmatically:
- Create a new C# console application project.
- Install the Syncfusion.Pdf.WinForms NuGet package as reference to your .NET Framework application from NuGet.org.
- Include the following namespace in the Program.cs file.
C#
using Syncfusion.Pdf; using Syncfusion.Pdf.Parsing;
VB.NET
Imports Syncfusion.Pdf Imports Syncfusion.Pdf.Parsing
- Use the following code snippet to convert PDF to PDF/A-1b.
C#
//Load an existing PDF
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
//Set the conformance for PDF/A-1b conversion
loadedDocument.Conformance = PdfConformanceLevel.Pdf_A1B;
//Save the document
loadedDocument.Save("Output.pdf");
//Close the document
loadedDocument.Close(true);
//This will open the PDF file so, the result will be seen in default PDF viewer
System.Diagnostics.Process.Start("Output.pdf");
VB.NET
'Load an existing PDF
Dim loadedDocument As New PdfLoadedDocument("Input.pdf")
'Set the conformance for PDF/A-1b conversion
loadedDocument.Conformance = PdfConformanceLevel.Pdf_A1B
'Save the document
loadedDocument.Save("Output.pdf")
'Close the document
loadedDocument.Close(True)
'This will open the PDF file so, the result will be seen in default PDF viewer
System.Diagnostics.Process.Start("Output.pdf")
A complete working sample can be downloaded from PDFConversionSample.zip.
By executing the program, you will get the PDF document as follows. 
Take a moment to peruse the documentation, where you can 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 here to explore the rich set of Syncfusion Essential PDF features.
An online sample link to convert PDF to PDF/A-1b standard document.
Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.
