DocSpring vs Puppeteer

Rendering is the easy part

Puppeteer is Google's Node.js library for controlling headless Chromium. Its page.pdf() method prints any page the browser can display, so anything you can build with modern HTML and CSS becomes a PDF. It is free, well documented, and used everywhere.

What Puppeteer does not give you is a document pipeline. There is no template storage, no versioning, no data validation, no retry logic, and no way to fill an existing PDF form. Each of those becomes code you write and infrastructure you run. Teams often underestimate the memory and process management needed to keep a fleet of Chromium instances healthy under load.

Feature comparison

Follow the feature links for details in DocSpring's documentation. Sources for each Puppeteer cell are listed at the end of the page.

Scroll the table sideways to see both products.

"Limited or your responsibility" marks things the library only partly covers or leaves to your own code and infrastructure. Plan requirements and product boundaries are noted in the cells.

The same invoice, with and without a browser to babysit

Suppose your application sends a customer name and a list of line items. Both approaches produce a PDF from HTML. Compare where the HTML lives, who runs Chromium, and what happens when the render fails.

Generate the invoice with Puppeteer

A minimal version. Production code also needs a browser pool, timeouts, retries, and font installation.

import puppeteer from 'puppeteer'

// You render the HTML yourself first (EJS, Handlebars, React, etc.)
const html = renderInvoiceHtml({ customer_name: 'Mira Patel', items })

const browser = await puppeteer.launch()
try {
  const page = await browser.newPage()
  await page.setContent(html, { waitUntil: 'networkidle0' })
  const pdf = await page.pdf({ format: 'A4', printBackground: true })
  await saveInvoice(pdf) // your storage, retention, and delivery
} finally {
  await browser.close()
}

Generate the invoice with DocSpring

The same invoice as a Liquid template stored in DocSpring. Send the JSON and DocSpring renders it with Chromium on its own servers.

<h1>Invoice for {{ customer_name | escape }}</h1>
<table>
  <tr><th>Description</th><th>Amount (USD)</th></tr>
  {% for item in items %}
    <tr>
      <td>{{ item.description | escape }}</td>
      <td>{{ item.amount | currency }}</td>
    </tr>
  {% endfor %}
</table>

curl --fail-with-body \
  "https://sync.api.docspring.com/api/v1/templates/${DOCSPRING_TEMPLATE_ID}/submissions" \
  --user "${DOCSPRING_TEST_TOKEN_ID}:${DOCSPRING_TEST_TOKEN_SECRET}" \
  --header 'Content-Type: application/json' \
  --data '{
    "test": true,
    "data": {
      "customer_name": "Mira Patel",
      "items": [
        { "description": "Annual inspection", "amount": 120 },
        { "description": "Replacement filter", "amount": 35 }
      ]
    }
  }'

Set the environment variables to your template ID and test API credentials. Accounts in our EU region send requests to sync.api-eu.docspring.com instead. The response includes a download URL for a watermarked PDF. See the request and response guide.

Test what happens when Chromium crashes mid-render, when 50 invoices arrive at once, and when a web font fails to load. Those are the cases that turn a 20-line script into a service you maintain.

Free software, paid for in engineering time

If your team spends two engineer-days a quarter keeping a Puppeteer service healthy, that alone costs more than a year of DocSpring's Starter plan. Below a few hundred PDFs a month with no form filling, Puppeteer can still be the cheaper choice if that time is genuinely free.

Moving from Puppeteer to DocSpring

Your HTML and CSS move over largely unchanged, because DocSpring also renders with headless Chromium. DocSpring adds normalize.css and default styles for the font, background, and page margins, so set fonts, margins, and page size explicitly, then compare page breaks. Replace your template engine's loops and conditions with Liquid, and move the data contract into the template's JSON schema.

Replace the browser code with one API call. Delete the queue, the browser pool, and the container image. Point your storage step at DocSpring's download URL, or configure S3 delivery and let DocSpring write the file for you.

If you also have PDF forms you were filling with pdf-lib or similar, upload them to DocSpring and place the fields visually instead of maintaining coordinates in code.

Discuss your documents with us.

Questions about Puppeteer and DocSpring

Will my Puppeteer PDFs look the same in DocSpring?

Usually, once the page settings match. Both render with headless Chromium, but DocSpring adds normalize.css and default styles for the font, background, and page margins. Set fonts, margins, and page size explicitly, and check anything that depended on JavaScript running at print time, because DocSpring renders a static Liquid template.

Can Puppeteer fill an existing PDF form?

No. Puppeteer only prints web pages. Filling an existing PDF requires a PDF manipulation library and, for flat PDFs without fields, hand-measured coordinates. DocSpring lets you upload the PDF and drag fields onto it.

Is Puppeteer cheaper than DocSpring?

The software is free. Whether the total is cheaper depends on how much engineering and operations time it consumes, and on whether you need features such as form filling, versioning, webhooks, or signing that you would otherwise build.