PDF/UA

Screen: Indicates that CSS rules are intended for on-screen viewing. Styles are optimized for digital screens, which typically include considerations like colors and layouts that look good on computer monitors.
Print: Instructs the browser to apply styles tailored for printed documents. This means the CSS rules are optimized for printing, ensuring readability and proper formatting when the HTML content is printed on physical media, like paper.

import {PdfDocument} from "@ironsoftware/ironpdf";

(async () => {
    // Open a PDF or use an exisiting rendered PDF
	const pdf = await PdfDocument.fromFile("source_doc.pdf");

    // Convert to PDF/UA
    await pdf.convertToPdfUA();

    // Save the PDF/UA Document to File
    await pdf.saveAs("pdfua-compliant.pdf");
})();

PDF/UA

PDF/UA (Portable Document Format/Universal Accessibility) is an international standard for accessible PDF documents. It was developed to ensure that PDF files are created and structured in a way that makes them accessible to individuals with disabilities, particularly those who use assistive technologies such as screen readers.

Use the convertToPdfUA method to convert normal PDFs into PDFs that comply with the PDF/UA standard. Export the PDF document with the saveAs method.