The PDF library
your whole stack can share.

# pip install rustpdf
import rustpdf

with rustpdf.Document() as doc:
    doc.pdfa(rustpdf.PdfaLevel.A2A).set_info(title="Report")
    f = doc.add_font_file("Roboto-Regular.ttf")
    doc.add_page()
    doc.show_text(f, 20, 72, 760, "Title", heading_level=1)
    data = doc.to_bytes()

with rustpdf.EditableDoc.load(data) as ed:
    ed.encrypt(owner="owner", method=rustpdf.Encryption.AES256)
    ed.save("secured.pdf")

// npm install rustpdf
const { Document, Encryption } = require("rustpdf");

const doc = new Document();
doc.pdfa();                       // PDF/A-2b
const f = doc.addFontFile("Roboto-Regular.ttf");
doc.addPage();
doc.showText(f, 20, 72, 760, "Invoice #1024");
const bytes = doc.toBytes();      // archival-grade PDF

// dotnet add package RustPdf
using RustPdf;

using var doc = new Document();
doc.Pdfa(PdfaLevel.A2a).Tagged().SetInfo(title: "Report");
int f = doc.AddFontFile("Roboto-Regular.ttf");
doc.AddPage();
doc.ShowText(f, 20, 72, 760, "Title", headingLevel: 1);
byte[] bytes = doc.ToBytes();      // archival-grade PDF

// go get github.com/rustpdf/rustpdf-go@latest
doc, _ := rustpdf.New()
defer doc.Close()
doc.PdfaLevel(rustpdf.A2a)
doc.Tagged()
doc.SetInfo(rustpdf.Info{Title: "Report"})
f, _ := doc.AddFontFile("Roboto-Regular.ttf")
doc.AddPage()
doc.ShowText(f, 20, 72, 760, "Title", 1) // heading level 1 = H1
data, _ := doc.ToBytes()

// composer require rust-pdf/rustpdf
use RustPdf\Document;
use RustPdf\PdfaLevel;

$doc = new Document();
$doc->pdfa(PdfaLevel::A2a)->setInfo(title: 'Report');
$f = $doc->addFontFile('Roboto-Regular.ttf');
$doc->addPage()->showText($f, 20, 72, 760, 'Title', 1);
$bytes = $doc->toBytes();          // archival-grade PDF

# gem install rustpdf
doc = RustPdf::Document.new
doc.pdfa(RustPdf::Pdfa::A2A).info(title: "Report")
f = doc.add_font_file("Roboto-Regular.ttf")
doc.add_page
   .show_text(f, 20, 72, 760, "Title", heading_level: 1)
data = doc.to_bytes               # archival-grade PDF

// add RustPdf.pas to your unit search path (rustpdf.dev/docs/delphi)
Doc := TPdfDocument.Create;
try
  Doc.Pdfa(palA2A).Tagged.SetInfo('Report', '', '', '', '');
  F := Doc.AddFontFile('Roboto-Regular.ttf');
  Doc.AddPage.ShowText(F, 20, 72, 760, 'Title', 1);   // heading level 1 = H1
  Bytes := Doc.ToBytes;            // archival-grade PDF
finally
  Doc.Free;
end;

// SwiftPM: download the rustpdf-swift package from rustpdf.dev/docs/swift
import RustPdf

let doc = try Document()
try doc.pdfa(.a2a).tagged().setInfo(DocumentInfo(title: "Report"))
let f = try doc.addFont(path: "Roboto-Regular.ttf")
try doc.addPage()
try doc.showText(font: f, size: 20, x: 72, y: 760, "Title", headingLevel: 1)
let bytes = try doc.toBytes()      // archival-grade PDF, links on macOS & iOS