How to Generate PDF Invoices in Node.js

Whether you're building a SaaS platform, an e-commerce store, or a reporting tool, you will eventually need to generate PDFs. Most developers reach for Puppeteer or Playwright—and for good reason. They are the gold standard for rendering HTML just like a browser does.

The Standard Approach: Puppeteer

Using Puppeteer is straightforward. You launch a headless browser, navigate to a page (or set HTML content), and export to PDF.

const puppeteer = require('puppeteer');

async function generateInvoice() {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  
  const html = `<h1>Invoice #1234</h1>`;
  await page.setContent(html, { waitUntil: 'networkidle0' });
  
  await page.pdf({
    path: 'invoice.pdf',
    format: 'A4',
    printBackground: true,
  });

  await browser.close();
}

The "Nightmare" in Production

The snippet above works perfectly on your local MacBook. But when you push it to a 1GB RAM VM or a Serverless function, things go south quickly.

Moving to a Managed PDF API

If your business relies on sending invoices to customers, you can't afford a failed process. This is where a managed API like RocketUtils becomes a "Utility Belt" for your code.

Instead of managing Chromium instances, you simply send your HTML to a secure endpoint and get the PDF back. No memory leaks, no DevOps, just results.

const fetch = require('node-fetch');

async function generateInvoice() {
  const response = await fetch('https://rocketutils.dev/v1/pdf', {
    method: 'POST',
    headers: { 'x-api-key': 'your_rocket_key' },
    body: JSON.stringify({
      html: `<h1>Invoice #1234</h1>`,
      options: { format: 'A4', margin: '20px' }
    })
  });

  const pdfBuffer = await response.buffer();
  // Save or stream back to user
}

The Bottom Line

When should you self-host?

• You have a dedicated DevOps team to monitor browser processes.
• You have strictly local data that cannot leave your network.
• Your volume is extremely low and consistency isn't critical.

When should you use RocketUtils?

• You are running on Fly.io, Vercel, or AWS Lambda with limited resources.
• You need 99.9% reliability for customer-facing documents.
• You want to focus on your core business, not fixing libnss3.so errors.