Polotno SDK vs Puppeteer for PDF – screenshotting HTML vs rendering a design

Using Puppeteer to make PDFs is one of the most common patterns in Node, and for good reason: you already know HTML, Chrome already renders it, and page.pdf() is one line. It is also the pattern people most often outgrow. If the HTML exists only so that a browser can turn it into a document, you are maintaining a layout language, a rendering engine, and a browser pool to produce something a design schema would render directly.

Pick the one that matches what you are rendering

Pick Puppeteer if…

You are capturing a real web page. Archiving a live URL, snapshotting a dashboard, printing something that genuinely exists as a page. That is what a browser is for.
Your document is flowing, text-heavy content. Long reports where content pushes across page breaks are what CSS pagination handles well.
The HTML already exists and is maintained anyway. Reusing a page you ship regardless is a real saving.
You want no licence cost. Puppeteer is free. Operating it at volume is not, but the library is.

Pick Polotno SDK if…

The HTML exists only to become a PDF. That is the tell. You are using a browser as a layout engine for a document nobody browses.
Someone non-technical should own the layout. Editing a design beats editing a template with print media queries.
Output is positional. Certificates, tickets, labels, badges, and packaging are designed to fixed coordinates, and CSS fights that.
You need print output. Chrome emits RGB. CMYK, spot colours, bleed, crop marks, and PDF/X-4 come out of PDF export directly.
You do not want to run a browser fleet. Pre-warming, memory leaks, zombie processes, and version pinning are the ongoing cost of this pattern.

A layout engine you rent vs one you skip

1. What you maintain

Puppeteer means maintaining HTML and CSS, print stylesheets, a Chrome version, and a pool of browser processes. Polotno means maintaining a JSON design. When rendering is incidental to your product, the second is a lot less to own.

2. Determinism

A Chrome upgrade can move your layout. Fonts resolve differently across environments. Page breaks land where the engine decides. A schema with explicit coordinates renders the same everywhere because there is no layout engine making decisions.

3. Print colour

This is the hard stop for print work. A browser has no concept of CMYK, spot colours, or bleed. If your PDFs go to a commercial printer, Puppeteer cannot get you there without a separate conversion step, and the conversion is where colour goes wrong.

4. Cost at volume

Puppeteer's licence is free and its operation is not. Each render is a browser process with real memory. Polotno's Cloud Render API is priced per render at $0.004 an image with no fleet to run. Which is cheaper depends on volume and on what your engineering time is worth.

When Puppeteer is the right call

Capturing pages that genuinely exist on the web, or producing long flowing documents from HTML you already maintain. Both are good reasons and neither is a workaround.

The pattern worth questioning is the third one: hand-writing HTML with print media queries, whose only purpose is to be screenshotted into a document. That is the case where the browser is a detour.

FAQ

Can Polotno render HTML to PDF?

No, and this is the honest limitation. Polotno renders from its own JSON schema, not from arbitrary HTML. It converts the other way, PDF to HTML, via the PDF to HTML tool. If your input must be HTML, Puppeteer or a dedicated HTML-to-PDF service is the right tool.

Is Polotno's output better quality?

For designed, positional documents, yes: vector output, embedded subsetted fonts, real CMYK. For flowing text-heavy documents, Chrome's typography and pagination are strong and the comparison is closer.