1. Install pdfnative and make one PDF

Before this: nothing. This is the first step.

You need Node.js 22 or newer. Check with node --version.

npm install pdfnative

Create make-pdf.mjs:

import { writeFileSync } from 'node:fs';
import { buildDocumentPDFBytes } from 'pdfnative';

const bytes = buildDocumentPDFBytes({
  title: 'My first PDF',
  blocks: [
    { type: 'heading', text: 'Hello', level: 1 },
    { type: 'paragraph', text: 'This file was made by pdfnative.' },
  ],
});

writeFileSync('hello.pdf', bytes);
console.log('Wrote hello.pdf');

node make-pdf.mjs

What you should have

hello.pdf — a single A4 page with a large Hello and one line of text underneath. Open it in any PDF viewer. If it opens, everything below this page is detail.

Two things worth noticing

• buildDocumentPDFBytes is synchronous. It returns a Uint8Array, not a promise. No await.
• title sits at the top level. It is not inside a metadata object — that one holds author, subject and keywords only.

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