Puppeteer is the gold standard for programmatic web automation — and it generates excellent PDFs because it uses a real Chromium engine. If you need pixel-perfect output and you're already running Node.js with predictable server resources, Puppeteer can be the right choice.
But "Puppeteer in production" is a different animal from "Puppeteer on your laptop." This article looks honestly at both options so you can choose the right tool for your situation.
Where Puppeteer Shines
Puppeteer renders HTML exactly as Chromium would — full CSS Grid, flexbox, modern fonts, SVG, canvas. If your PDF templates use complex CSS, Puppeteer handles them without compromise.
It also lets you interact with the page before printing: click buttons, wait for animations, inject JavaScript. For highly dynamic PDFs (charts rendered client-side, for example) that control matters.
Where Puppeteer Is Painful
Each Puppeteer PDF generation spawns a Chromium process. That process uses 100–300 MB of RAM and takes 1–3 seconds to launch. Under concurrent load this adds up fast — and Chromium processes that crash silently leave zombie processes that eat memory until the server is restarted.
On containerised or serverless deployments you face additional friction: Chromium requires specific system libraries, has a large image footprint (~300 MB), and is blocked outright on most serverless platforms. ARM64 support has improved but still requires extra configuration.
How a REST API Compares
A hosted HTML to PDF API runs Chromium (or a comparable engine) on the API's infrastructure, not yours. From your application's perspective it's just an HTTP POST — fast, stateless, and trivially scalable because the concurrency and process management happen on the API side.
The trade-off: you can't interact with the page before rendering, and you're dependent on the API's uptime. For the vast majority of document-generation use cases (invoices, reports, receipts, certificates) that's a fine trade.
Quick Comparison
Use Puppeteer when: you need client-side JavaScript execution before PDF capture, you're already running Node.js on beefy servers, or you need fine-grained browser control.
Use a REST API when: you want zero infrastructure overhead, you're deploying to containers or serverless, you need to generate PDFs from PHP/Python/Ruby/Go, or you want to be done in 10 minutes.
const response = await fetch('https://platform.htmltopdfapi.co/api/v1/pdf/generate', {
method: 'POST',
headers: {
'Authorization': `Bearer ${process.env.HTMLTOPDF_API_KEY}`,
'Content-Type': 'application/json',
'Accept': 'application/pdf',
},
body: JSON.stringify({ html: '<h1>Hello</h1>', paper_size: 'a4' }),
})
const pdfBuffer = Buffer.from(await response.arrayBuffer())