PDF-Lib

pnpm add pdf-lib

import { PDFDocument, rgb, StandardFonts } from 'pdf-lib';

async function createPDF() {
  // Create a new PDFDocument
  const pdfDoc = await PDFDocument.create();
  
  // Add a blank page to the document
  const page = pdfDoc.addPage([550, 750]);
  
  // Get the standard font
  const font = await pdfDoc.embedFont(StandardFonts.Helvetica);
  
  // Draw some text on the page
  page.drawText('Hello World!', {
    x: 50,
    y: 700,
    size: 30,
    font,
    color: rgb(0, 0.53, 0.71),
  });
  
  // Serialize the PDFDocument to bytes
  const pdfBytes = await pdfDoc.save();
  
  // Create a blob from the bytes
  const blob = new Blob([pdfBytes], { type: 'application/pdf' });
  
  // Create a URL for the blob
  const url = URL.createObjectURL(blob);
  
  // Open the PDF in a new tab
  window.open(url);
}

import { PDFDocument } from 'pdf-lib';

async function modifyPDF(existingPdfBytes) {
  // Load the existing PDF
  const pdfDoc = await PDFDocument.load(existingPdfBytes);
  
  // Add a new page
  const page = pdfDoc.addPage([550, 750]);
  
  // Get the font
  const font = await pdfDoc.embedFont(StandardFonts.Helvetica);
  
  // Add content to the new page
  page.drawText('This page was added with pdf-lib!', {
    x: 50,
    y: 700,
    size: 24,
    font,
  });
  
  // Save the modified PDF
  const modifiedPdfBytes = await pdfDoc.save();
  return modifiedPdfBytes;
}