gPdf
Comparisons

gPdf vs Puppeteer

Head-to-head: gPdf's edge-rendered JSON-to-PDF API versus Puppeteer's headless-Chromium-on-a-server pattern. Latency, price, runtime, and the workloads where each one wins.

category: Headless browser
TL;DR

Puppeteer is a general-purpose browser automation tool that happens to render PDFs. gPdf is a PDF rendering engine that runs at the edge in single-digit milliseconds. If your workload is structured documents (invoices, labels, statements) at production volume, gPdf delivers 50-100× lower latency and 10-20× lower cost. If you need to convert arbitrary live web pages or screenshot-style PDFs of existing HTML, Puppeteer is still the right tool.

Side by side

Axis gPdf Puppeteer Edge
Render p50 (1-page A4 invoice)
Both measured on the same input over 1K invocations.
 3 ms 312 ms gPdf
Cold start ~12 ms (first request to a fresh isolate) 1.5–2.5 s (Chromium boot) gPdf
Runtime
Puppeteer needs a 200–800 MB browser binary; gPdf ships as a ~2 MB WASM module.
 Cloudflare Workers V8 isolates Long-lived Node.js + Chromium container gPdf
Edge regions 300+ Cloudflare PoPs Wherever you deploy your container (typically 3–6 regions) gPdf
PDF/A compliance PDF/A-1b · 2b · 3b · 4 selectable per request Not supported natively; needs post-processing with Ghostscript or veraPDF gPdf
E-invoice (Factur-X / ZUGFeRD) Native endpoint; embeds CII XML on PDF/A-3b Not supported; requires a separate pipeline stage gPdf
Vector barcodes
Puppeteer can print what the page renders, but barcode geometry, quiet zones, and thermal-printer sizing remain application-owned.
 30+ symbologies built in (QR, GS1-128, PDF417, DataMatrix, …) Depends on a page-level barcode library, SVG/canvas choice, and print sizing gPdf
CJK font handling NotoSans CJK embedded; automatic glyph fallback Whatever fonts the container has installed; needs OS-level setup gPdf
HTML/CSS layout fidelity N/A — gPdf takes JSON, not HTML Best-in-class. Renders any web page. Puppeteer
Best for screenshot-style web→PDF No Yes Puppeteer
List price at 100K one-page documents
Puppeteer itself is free. The paid surface is the Chromium service you build around it.
 $5/month Basic plan includes 100K pages No license fee; you pay hosting, storage, monitoring, and engineer time gPdf
Production ownership cost Hosted edge API, visual Studio workflow, templates, fonts, barcode primitives, PDF/A/e-invoice paths Chromium containers, warm pools, regional capacity, page templates, fonts, retries, observability gPdf
Determinism (same input → same bytes) Yes — byte-identical output across isolates No — Chromium font hinting and rasterisation drift between versions gPdf

When to pick which

Pick gPdf when
  • You're rendering structured documents (invoices, shipping labels, statements, payslips, tickets) at any volume.
  • You need single-digit-millisecond rendering for an interactive flow (preview before send).
  • You need PDF/A archival compliance or EU Factur-X / ZUGFeRD e-invoice output.
  • You're tired of Chromium memory pressure, container warm-pool cost, or cold-start timeout cascades.
  • You want byte-identical, deterministic PDFs for testing or audit.
  • You're rendering at the edge and need 300+ regions, not 3–6.
Pick Puppeteer when
  • You're converting arbitrary live web pages — landing pages, news articles, marketing snapshots.
  • Your source-of-truth document is HTML/CSS that already renders correctly in a browser, and you don't want to reauthor it as JSON.
  • You're rendering rich client-side JavaScript visualisations (charts, dashboards) that need a real browser.
  • Your volume is small (<1K renders/day) and you don't care about per-render latency or cost.
  • You need pixel-perfect matching between the on-screen DOM and the PDF for legal/forensic reasons.
Capabilities

gPdf is an edge-native JSON-to-PDF API built for high-volume invoices, documents, shipping labels, barcodes, PDF/A, and e-invoices. Millisecond-class PDF rendering at global edge scale — optimized for predictable, industrial-grade document generation. Infrastructure-level pricing, low enough to replace building and operating your own PDF infrastructure.

Capabilities

Puppeteer is excellent when the product is a web page

Puppeteer drives a real Chromium browser. That is its superpower. If the source of truth is an existing HTML page, a dashboard with JavaScript charts, a legal snapshot of a rendered web app, or a screenshot-style export, Puppeteer is often the right product choice.

The product question is whether your PDF is really a web page, or whether it is a structured business document. Invoices, labels, statements, receipts, tickets, and forms usually come from data, not from a live DOM. For those workflows, running a whole browser can be more architecture than the document needs.

Same artifact, different product boundary

Puppeteer turns HTML into a printed PDF through Chromium. The application owns HTML templates, CSS print rules, font installation, the browser runtime, worker capacity, retries, and regional deployment.

gPdf turns structured JSON into a PDF directly. The application sends a DocumentRequest or template_id + data; the edge renderer owns layout execution, bundled fonts, barcode primitives, PDF/A profiles, and e-invoice packaging. There is no browser process, no CSS cascade, and no Chromium container to keep warm.

Product fit: web capture vs document generation

Choose Puppeteer when the document must look exactly like an existing web page or when client-side JavaScript produces the final visual state. That includes web archives, dynamic dashboards, DOM-heavy reports, and workflows where re-authoring the layout as JSON would create more risk than it removes.

Choose gPdf when the product is document generation: a label, invoice, ticket, statement, certificate, receipt, or compliance package that should be generated the same way from clean data every time.

Development time: HTML print debugging vs API templates

Puppeteer starts quickly when the HTML already exists. The development time appears later: print CSS, page-break behavior, font installation inside containers, header/footer edge cases, barcode sizing, and browser version drift.

gPdf starts from a structured template. Teams can write JSON directly, use AI to draft schema-valid layouts, or use gPdf Studio to add and drag text, tables, images, shapes, headers, footers, and barcodes visually. Once the template is saved, production calls can stay as template_id + data.

Price model: free automation library vs operated browser fleet

Puppeteer has no license fee. That does not make a production Puppeteer PDF service free.

The cost surface is the service around Chromium:

  • Container or serverless runtime for the browser binary.
  • Warm pools or queueing to absorb cold starts.
  • Memory headroom for pages, fonts, images, and PDF bytes.
  • Regional deployment if warehouses or customers are global.
  • Monitoring, retries, browser upgrades, and security patches.

gPdf prices the PDF generation surface directly. The Basic plan starts at 5/month for 100K pages, and the public per-page math starts at 0.00005/page. There are no seats, no separate test/prod environment fees, and no Chromium pool to operate.

Edge generation changes the latency and cost shape

With Puppeteer, the browser usually lives where you host it. If the warehouse, customer, or backend job is far from that region, the render path includes network latency plus the browser work itself. Adding regions means duplicating the browser service, deployment pipeline, monitoring, and capacity plan.

gPdf runs on Cloudflare Workers V8 isolates. For structured PDFs, the renderer is small enough to run near the caller instead of centralizing every render in one region. The business effect is not only faster p50 numbers; it is removing a regional Chromium fleet from the product.

Product capabilities that usually decide the comparison

For operational documents, the feature list matters as much as raw rendering:

  • Native barcode elements for labels, tickets, and warehouse documents.
  • Bundled CJK and multilingual font fallback.
  • PDF/A output profiles for archive workflows.
  • Factur-X/ZUGFeRD e-invoice packaging.
  • Password-protected PDFs and metadata controls on higher tiers.
  • Visual layout iteration through gPdf Studio.

Puppeteer can support many of these through page code, browser setup, or post-processing. The question is whether your team wants to own that stack.

When Puppeteer is still the right answer

There is a category gPdf does not compete in: arbitrary HTML-to-PDF conversion. If the document is already rendered, the design source of truth is the HTML, and you need a real browser to execute JavaScript or match the DOM, Puppeteer remains the correct tool.

If the workload is small and latency is not important, the operational cost may also be acceptable. A few internal exports per day do not justify reauthoring stable HTML as JSON.

Migration shape

For teams moving an invoice or label workload from Puppeteer to gPdf, the migration usually looks like:

- // Before: render an HTML template through Chromium
- const browser = await puppeteer.launch({ headless: 'new' });
- const page = await browser.newPage();
- await page.setContent(invoiceHtml);
- const pdf = await page.pdf({ format: 'A4' });
+ // After: POST the structured DocumentRequest
+ const res = await fetch('https://api.gpdf.com/api/v1/template-render', {
+   method: 'POST',
+   headers: { Authorization: `Bearer ${KEY}`, 'Content-Type': 'application/json' },
+   body: JSON.stringify({ template_id: 'invoice-v2', data }),
+ });
+ const pdf = Buffer.from(await res.arrayBuffer());

The work isn’t the API call — it’s authoring the template once. After that, every render call is a single HTTPS POST.

Teams comparing Puppeteer and gPdf often search for headless Chrome PDF alternatives, serverless PDF generation, edge PDF generation, Chromium-free PDF API, invoice PDF API, shipping label API, barcode PDF generation, HTML to PDF migration, JSON to PDF API, and PDF generation cost at scale.

FAQ

Is Puppeteer free?

Puppeteer is free to use as a library. In production, the cost is the browser service: containers, memory, cold starts, regional capacity, monitoring, retries, and maintenance.

Can gPdf render arbitrary HTML pages?

No. gPdf is JSON-native. If your source of truth is arbitrary HTML or a live web page, Puppeteer is the better fit.

Why compare Studio against Puppeteer?

Because many teams use HTML partly because designers and developers can see the result. gPdf Studio gives structured PDF templates a visual editing surface without turning the runtime into a browser.

See also