This article demonstrates how to convert PDF to PDF/A-1A, 2A, 3A, 1B, 2B and 3B compliant PDF using Spire.PDF for Java.
import com.spire.pdf.conversion.PdfStandardsConverter; public class ConvertPdfToPdfA { public static void main(String[] args) { //Specify input file path String inputFile = "C:/Users/Administrator/Desktop/sample.pdf"; //Specify output folder String outputFolder = "C:/Users/Administrator/Desktop/Output/"; //Create a PdfStandardsConverter instance, passing in the input file as a parameter PdfStandardsConverter converter = new PdfStandardsConverter(inputFile); //Convert to PdfA1A converter.toPdfA1A(outputFolder + "ToPdfA1A.pdf"); //Convert to PdfA1B converter.toPdfA1B(outputFolder + "ToPdfA1B.pdf"); //Convert to PdfA2A converter.toPdfA2A(outputFolder + "ToPdfA2A.pdf"); //Convert to PdfA2B converter.toPdfA2B(outputFolder + "ToPdfA2B.pdf"); //Convert to PdfA3A converter.toPdfA3A(outputFolder + "ToPdfA3A.pdf"); //Convert to PdfA3B converter.toPdfA3B(outputFolder + "ToPdfA3B.pdf"); } }