comparison guide self-hosted · April 17, 2026 · 15 min read

Self-Hosted Screenshot & PDF Generation APIs: Gotenberg vs Playwright vs Puppeteer 2026

Complete guide to self-hosted screenshot and PDF generation APIs. Compare Gotenberg, Playwright, and Puppeteer for automated document rendering, invoice generation, and visual testing — with Docker setup instructions and performance benchmarks.

OpenSwap Guide Team Editorial Team

Automated PDF generation and website screenshots are core building blocks for countless applications. Invoices, reports, receipts, social media previews, and compliance documentation all depend on rendering HTML into pixel-perfect documents. The problem is that most teams rely on third-party SaaS APIs for this — services that charge per render, impose rate limits, and process your documents on servers you don’t control.

Running your own screenshot and PDF generation stack gives you unlimited renders at zero marginal cost, full data privacy, and the ability to customize every aspect of the rendering pipeline. In 2026, the best tools for this job are open-source and ready to self-host.

Why Self-Host Your Rendering Infrastructure

There are several compelling reasons to move PDF and screenshot generation in-house:

Cost at scale. Commercial rendering APIs typically charge $0.01–$0.05 per render. That’s manageable for a few hundred documents, but a business generating 50,000 invoices per month pays $500–$2,500 for something that costs nothing to run locally. A single $10/month VPS with Gotenberg handles thousands of renders daily with room to spare.

Data privacy. Invoices, legal documents, financial reports, and health records flow through your rendering pipeline. Third-party services see every document you generate. Self-hosting keeps sensitive content within your infrastructure boundary — critical for GDPR, HIPAA, and SOC 2 compliance.

No rate limits. SaaS APIs throttle concurrent requests and impose daily quotas. When your batch job needs to generate 10,000 end-of-month reports, rate limits become a bottleneck. Self-hosted infrastructure scales with your hardware — add more containers, add more throughput.

Customization. Self-hosted solutions let you inject custom fonts, configure rendering parameters, modify page layouts, and integrate directly with your existing services. You control the Chromium version, the sandbox settings, and the network stack.

Reliability. External APIs go down. When your payment provider’s receipt generation depends on a third-party service and that service has an outage, your business stops. Self-hosted rendering eliminates this single point of failure.

What These Tools Actually Do

Before comparing options, it helps to understand the landscape. There are three categories of self-hosted rendering tools:

Dedicated rendering APIs wrap headless Chromium in a REST API. You send HTML or a URL, and get back a PDF or screenshot. Gotenberg is the standout here — it’s purpose-built for this exact workflow, with a clean API, docker-native deployment, and features like PDF merging, form filling, and office document conversion.

Browser automation frameworks give you programmatic control over a headless browser. Playwright and Puppeteer let you write scripts that navigate pages, fill forms, take screenshots, and export PDFs. They’re more flexible but require more code to achieve the same result as a dedicated API.

Hybrid solutions combine both approaches — tools like Browserless provide a REST API layer on top of Puppeteer/Playwright, giving you the convenience of an API with the flexibility of a browser automation framework.

Gotenberg: The Dedicated Rendering API

Gotenberg is a stateless, Docker-first API for PDF generation. It wraps Chromium and LibreOffice, exposing a clean REST endpoint that accepts HTML, Markdown, URLs, and even Office documents. It’s the simplest option to deploy and the most feature-complete for common use cases.

Docker Setup

The fastest way to get started is a single Docker Compose file:

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version: "3.8"

services:
  gotenberg:
    image: gotenberg/gotenberg:8
    ports:
      - "3000:3000"
    restart: unless-stopped
    environment:
      - GOTENBERG_API_TIMEOUT=30s
      - GOTENBERG_CHROMIUM_RESTART_AFTER=100
      - GOTENBERG_CHROMIUM_AUTO_FILTER=true

Start it with docker compose up -d. The API is immediately available at http://localhost:3000.

Generate a PDF from HTML

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curl --request POST 'http://localhost:3000/forms/html' \
  --form 'files=@"/path/to/invoice.html"' \
  --form 'footer.html=@"/path/to/footer.html"' \
  --form 'nativePageRanges="1-3"' \
  --form 'pageSize="A4"' \
  --form 'preferCssPageSize=true' \
  --output invoice.pdf

Generate a PDF from a URL

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curl --request POST 'http://localhost:3000/forms/url' \
  --form 'url="https://example.com/report"' \
  --form 'waitForTimeout=2000' \
  --form 'emulatedMediaType="screen"' \
  --output report.pdf

Take a Screenshot

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curl --request POST 'http://localhost:3000/forms/url' \
  --form 'url="https://example.com"' \
  --form 'screenshots=true' \
  --form 'screenshotsFormat="jpeg"' \
  --form 'screenshotsQuality=90' \
  --form 'singlePage=true' \
  --output screenshot.jpg

Merge Multiple PDFs

Gotenberg can combine existing PDFs into a single document — useful for assembling reports from multiple sources:

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curl --request POST 'http://localhost:3000/forms/merge' \
  --form 'files=@"/path/to/report-part1.pdf"' \
  --form 'files=@"/path/to/report-part2.pdf"' \
  --form 'files=@"/path/to/report-part3.pdf"' \
  --output full-report.pdf

Production Hardening

For production deployments, add these configurations:

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version: "3.8"

services:
  gotenberg:
    image: gotenberg/gotenberg:8
    ports:
      - "3000:3000"
    restart: unless-stopped
    environment:
      - GOTENBERG_API_TIMEOUT=60s
      - GOTENBERG_CHROMIUM_RESTART_AFTER=100
      - GOTENBERG_CHROMIUM_AUTO_FILTER=true
      - GOTENBERG_CHROMIUM_INCognito=true
      - GOTENBERG_DISABLE_ROUTER=true
      - GOTENBERG_API_DISABLE_HEALTH_CHECK_LOGGING=true
    deploy:
      resources:
        limits:
          memory: 2G
          cpus: "2"
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
      interval: 30s
      timeout: 5s
      retries: 3

The CHROMIUM_RESTART_AFTER setting prevents memory leaks by recycling Chromium instances. The INCOGNITO flag ensures no data persists between requests. Resource limits prevent runaway processes from consuming the entire host.

Playwright: The Browser Automation Powerhouse

Playwright is a cross-browser automation library developed by Microsoft. It supports Chromium, Firefox, and WebKit through a single API. While it requires writing code rather than making HTTP requests, it offers unmatched control over the rendering process.

Installation

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# Install Playwright for Node.js
npm init -y
npm install playwright
npx playwright install --with-deps chromium

# Or for Python
pip install playwright
playwright install --with-deps chromium

Docker Deployment

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version: "3.8"

services:
  playwright-screenshot:
    image: mcr.microsoft.com/playwright:v1.49.0-jammy
    ports:
      - "3000:3000"
    working_dir: /app
    volumes:
      - ./app:/app
    command: ["node", "server.js"]
    restart: unless-stopped
    environment:
      - PLAYWRIGHT_BROWSERS_PATH=/ms-playwright

Screenshot Server with Playwright

Create server.js to expose a simple screenshot API:

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const http = require("http");
const { chromium } = require("playwright");

const PORT = 3000;

(async () => {
  const browser = await chromium.launch({
    headless: true,
    args: [
      "--no-sandbox",
      "--disable-setuid-sandbox",
      "--disable-dev-shm-usage",
      "--disable-gpu",
    ],
  });

  const server = http.createServer(async (req, res) => {
    if (req.method !== "GET" || !req.url.startsWith("/screenshot")) {
      res.writeHead(404);
      res.end("Not found");
      return;
    }

    const url = new URL(req.url, `http://localhost:${PORT}`);
    const targetUrl = url.searchParams.get("url");

    if (!targetUrl) {
      res.writeHead(400);
      res.end("Missing url parameter");
      return;
    }

    try {
      const context = await browser.newContext({
        viewport: { width: 1280, height: 720 },
        deviceScaleFactor: 1,
      });

      const page = await context.newPage();
      await page.goto(targetUrl, {
        waitUntil: "networkidle",
        timeout: 15000,
      });

      // Wait for any lazy-loaded content
      await page.waitForTimeout(1000);

      const screenshot = await page.screenshot({
        fullPage: true,
        type: "jpeg",
        quality: 85,
      });

      await context.close();

      res.writeHead(200, {
        "Content-Type": "image/jpeg",
        "Content-Length": screenshot.length,
      });
      res.end(screenshot);
    } catch (err) {
      res.writeHead(500);
      res.end(`Error: ${err.message}`);
    }
  });

  server.listen(PORT, () => {
    console.log(`Screenshot server running on port ${PORT}`);
  });
})();

Use it with:

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curl "http://localhost:3000/screenshot?url=https://example.com" -o example.jpg

PDF Generation with Playwright

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const page = await browser.newPage();
await page.goto("https://example.com/invoice", {
  waitUntil: "networkidle",
});

const pdf = await page.pdf({
  format: "A4",
  printBackground: true,
  margin: { top: "20mm", bottom: "20mm", left: "15mm", right: "15mm" },
  displayHeaderFooter: true,
  headerTemplate: '<div style="font-size:10px;margin-left:20px;">CONFIDENTIAL</div>',
  footerTemplate:
    '<div style="font-size:10px;width:100%;text-align:center;">Page <span class="pageNumber"></span> of <span class="totalPages"></span></div>',
});

require("fs").writeFileSync("invoice.pdf", pdf);

Playwright’s strength is in complex workflows — logging into a dashboard, navigating to a report page, waiting for charts to render, then capturing a screenshot. It handles authentication, JavaScript execution, and dynamic content far better than simple HTML-to-PDF converters.

Puppeteer: The Original Headless Chrome API

Puppeteer is Google’s official Node.js library for controlling headless Chrome. It predates Playwright and remains widely used, though Playwright has surpassed it in feature parity and cross-browser support.

Installation and Setup

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npm install puppeteer
# Or puppeteer-core with a separate browser installation
npm install puppeteer-core

Docker Deployment

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version: "3.8"

services:
  puppeteer-renderer:
    image: ghcr.io/browserless/chromium:latest
    ports:
      - "3000:3000"
    restart: unless-stopped
    environment:
      - CONCURRENT=5
      - MAX_QUEUE_LENGTH=10
      - TIMEOUT=30000
      - PRE_REQUEST_HEALTH_CHECK=true
      - EXIT_ON_HEALTH_CHECK_FAILURE=true

The Browserless image wraps Puppeteer with a REST API and connection management, making it production-ready out of the box.

Generate PDF with Puppeteer

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const puppeteer = require("puppeteer");

async function generatePDF(url, outputPath) {
  const browser = await puppeteer.launch({
    headless: "new",
    args: [
      "--no-sandbox",
      "--disable-setuid-sandbox",
      "--disable-dev-shm-usage",
    ],
  });

  const page = await browser.newPage();
  await page.setViewport({ width: 1280, height: 800 });
  await page.goto(url, { waitUntil: "networkidle2" });

  await page.pdf({
    path: outputPath,
    format: "A4",
    printBackground: true,
    preferCSSPageSize: true,
  });

  await browser.close();
}

generatePDF("https://example.com/report", "report.pdf");

Screenshot with Puppeteer

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const page = await browser.newPage();
await page.goto("https://example.com", {
  waitUntil: "networkidle2",
});

// Full page screenshot
await page.screenshot({
  path: "fullpage.png",
  fullPage: true,
});

// Element-specific screenshot
const element = await page.$(".dashboard-card");
await element.screenshot({ path: "card.png" });

HTML String to PDF (No URL Needed)

Puppeteer can render raw HTML strings directly, which is ideal for generating invoices from templates:

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const page = await browser.newPage();

const html = `
<!DOCTYPE html>
<html>
<head>
  <style>
    body { font-family: Arial, sans-serif; padding: 40px; }
    .invoice-header { border-bottom: 2px solid #333; padding-bottom: 20px; }
    .line-item { display: flex; justify-content: space-between; padding: 8px 0; }
    .total { font-weight: bold; font-size: 1.2em; border-top: 2px solid #333; padding-top: 10px; }
    @media print { .no-print { display: none; } }
  </style>
</head>
<body>
  <div class="invoice-header">
    <h1>Invoice #2026-0042</h1>
    <p>Date: April 17, 2026</p>
  </div>
  <div class="line-item"><span>Web hosting (annual)</span><span>$120.00</span></div>
  <div class="line-item"><span>SSL certificate</span><span>$25.00</span></div>
  <div class="line-item"><span>CDN bandwidth (500GB)</span><span>$45.00</span></div>
  <div class="total"><span>Total</span><span>$190.00</span></div>
</body>
</html>
`;

await page.setContent(html, { waitUntil: "networkidle2" });
await page.pdf({ path: "invoice.pdf", format: "A4" });

Feature Comparison

Feature	Gotenberg	Playwright	Puppeteer + Browserless
Primary purpose	PDF/screenshot API	Browser automation	Browser automation
Deployment	Single container	Code + container	Pre-built container
API interface	REST (HTTP forms)	Programmatic (Node.js/Python/Java/C#)	REST + programmatic
HTML to PDF	Yes	Yes	Yes
URL to PDF	Yes	Yes	Yes
Screenshots	JPEG/PNG	JPEG/PNG/WebP	JPEG/PNG/WebP
PDF merging	Built-in	Manual	Manual
Office to PDF	Yes (LibreOffice)	No	No
Form filling (PDF)	Built-in	Manual	Manual
Markdown to PDF	Yes	No	No
PDF/A compliance	Yes (PDF/A-1b, 2b, 3b)	No	No
Multi-browser	Chromium only	Chromium, Firefox, WebKit	Chromium only
Concurrent requests	Configurable pool	Manual management	Connection queue built-in
Custom fonts	Mount volume	Programmatic injection	Programmatic injection
Authentication handling	Cookie injection	Full login automation	Full login automation
Memory management	Auto-restart instances	Manual cleanup	Pool management
Learning curve	Low (curl commands)	Medium (API knowledge)	Medium (API knowledge)
Best for	Document pipelines	Complex workflows	Chrome-specific tasks

Performance Considerations

Rendering performance depends heavily on page complexity, but here are baseline measurements from a 2 vCPU / 4GB RAM server:

Gotenberg: Handles 5–10 concurrent PDF generations. Each render takes 1–3 seconds for typical pages. The auto-restart feature keeps memory usage stable even under sustained load. For high-throughput scenarios, run multiple Gotenberg instances behind a reverse proxy with round-robin load balancing.

Playwright: Browser startup adds 2–3 seconds on first request, but browser reuse cuts subsequent renders to under 1 second. The key optimization is keeping a single browser instance alive and creating new contexts per request — contexts are lightweight and isolated.

Puppeteer with Browserless: The built-in connection pool handles up to CONCURRENT simultaneous sessions. Queue length limits prevent memory exhaustion. The health checkkubernetesintegrates cleanly with Docker Swarm and Kubernetes for automatic scaling.

Scaling with Traefik

For production-scale rendering, deploy multiple Gotenberg containers behind Traefik:

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version: "3.8"

services:
  traefik:
    image: traefik:v3.2
    command:
      - "--providers.docker=true"
      - "--entrypoints.web.address=:80"
    ports:
      - "80:80"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"

  gotenberg-1:
    image: gotenberg/gotenberg:8
    labels:
      - "traefik.http.routers.gotenberg.rule=Host(`render.internal`)"
      - "traefik.http.services.gotenberg.loadbalancer.server.port=3000"
    environment:
      - GOTENBERG_CHROMIUM_RESTART_AFTER=100
    deploy:
      replicas: 4
      resources:
        limits:
          memory: 2G
          cpus: "1"

This setup distributes requests across 4 Gotenberg instances, each limited to 2GB memory and 1 CPU. Traefik handles health checking and failover automatically.

Real-World Use Cases

Invoice Generation Pipeline

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#!/bin/bash
# Generate monthly invoices from HTML templates

TEMPLATE_DIR="/opt/invoices/templates"
OUTPUT_DIR="/opt/invoices/output"
GOTENBERG_URL="http://localhost:3000"

for client in $(ls "$TEMPLATE_DIR"); do
  curl --silent --request POST "${GOTENBERG_URL}/forms/html" \
    --form "files=@${TEMPLATE_DIR}/${client}/invoice.html" \
    --form "files=@${TEMPLATE_DIR}/${client}/header.html" \
    --form "pdfFormat=PDF/A-3b" \
    --form "nativePageRanges=1" \
    --output "${OUTPUT_DIR}/${client}-invoice-$(date +%Y-%m).pdf"
done

Automated Visual Regression Testing

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const { chromium } = require("playwright");
const pixelmatch = require("pixelmatch");
const { PNG } = require("pngjs");
const fs = require("fs");

async function visualDiff(url, baselinePath, diffPath) {
  const browser = await chromium.launch();
  const page = await browser.newPage({ viewport: { width: 1280, height: 800 } });

  await page.goto(url, { waitUntil: "networkidle" });
  await page.screenshot({ path: "current.png" });
  await browser.close();

  const baseline = PNG.sync.read(fs.readFileSync(baselinePath));
  const current = PNG.sync.read(fs.readFileSync("current.png"));
  const { width, height } = baseline;
  const diff = new PNG({ width, height });

  const mismatches = pixelmatch(
    baseline.data,
    current.data,
    diff.data,
    width,
    height,
    { threshold: 0.1 }
  );

  if (mismatches > 0) {
    fs.writeFileSync(diffPath, PNG.sync.write(diff));
    console.log(`Visual differences detected: ${mismatches} pixels`);
  } else {
    console.log("Screenshots match exactly");
  }

  return mismatches;
}

visualDiff(
  "https://app.example.com/dashboard",
  "baselines/dashboard.png",
  "diffs/dashboard.png"
);

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# Generate Open Graph preview images from web pages
# Useful for CMS platforms that need automatic social media thumbnails

generate_og_image() {
  local url="$1"
  local output="$2"

  curl --silent --request POST "http://localhost:3000/forms/url" \
    --form "url=${url}" \
    --form "screenshots=true" \
    --form "screenshotsFormat=jpeg" \
    --form "screenshotsQuality=85" \
    --form "singlePage=true" \
    --form "viewport.width=1200" \
    --form "viewport.height=630" \
    --output "${output}"
}

generate_og_image "https://blog.example.com/latest-post" "/var/www/og-preview.jpg"

Security Best Practices

When running a rendering service, you’re essentially running a web browser that visits arbitrary URLs. This carries real security risks:

Network isolation. Run Gotenberg or Puppeteer in a Docker network with no outbound access to internal services. Use Docker user-defined networks and firewall rules to restrict what the rendering container can reach.

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services:
  gotenberg:
    image: gotenberg/gotenberg:8
    networks:
      - render-net
    # Block access to internal networks
    environment:
      - GOTENBERG_CHROMIUM_ALLOWED_ENDPOINTS=*.example.com,*.cdn.example.net

networks:
  render-net:
    driver: bridge
    ipam:
      config:
        - subnet: 172.28.0.0/16

Request filtering. Enable CHROMIUM_AUTO_FILTER in Gotenberg to block requests to private IP ranges. In Playwright, use route interception to filter outbound requests:

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await page.route("**/*", async (route) => {
  const url = route.request().url();
  const blocked = ["localhost", "127.0.0.1", "10.", "172.16.", "192.168."];

  if (blocked.some((prefix) => url.includes(prefix))) {
    route.abort();
  } else {
    route.continue();
  }
});

Resource limits. Always set Docker memory and CPU limits. A malicious or buggy page can consume unbounded resources through infinite loops, large allocations, or rendering explosions.

Input validation. Validate URLs before passing them to the rendering engine. Reject file://, ftp://, and data: URIs. Enforce HTTPS for external URLs.

Monitoring and Observability

Add health checks and metrics to track rendering performance:

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services:
  gotenberg:
    image: gotenberg/gotenberg:8
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
      interval: 15s
      timeout: 5s
      retries: 3
      start_period: 10s
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    environment:
      - GOTENBERG_API_DISABLE_HEALTH_CHECK_LOGGING=true

For Prometheus metrics, the Browserless image exposes /metrics endpoint. For Gotenberg, parse access logs to track request counts, error rates, and p99 latency.

Choosing the Right Tool

The decision comes down to your use case complexity:

Use Gotenberg if you need a straightforward PDF or screenshot API. It requires zero code, deploys as a single container, and covers 90% of rendering needs — HTML to PDF, URL to PDF, screenshots, PDF merging, and office document conversion. It’s the best choice for invoice generation, report pipelines, and document workflows.

Use Playwright if you need to interact with pages before capturing them — logging into dashboards, filling forms, waiting for JavaScript to render charts, or running visual regression tests. Its multi-browser support (Chromium, Firefox, WebKit) is unmatched, making it essential for cross-browser testing.

Use Puppeteer with Browserless if you’re already invested in the Puppeteer ecosystem or need the specific features of the Browserless platform — connection pooling, session management, and the built-in REST API. It’s a solid middle ground between Gotenberg’s simplicity and Playwright’s flexibility.

All three are open-source, self-hostable, and eliminate the need to send your documents through third-party APIs. The rendering infrastructure you run yourself will always be cheaper at scale, more private by default, and more reliable because you control the entire stack.

Frequently Asked Questions (FAQ)

Which one should I choose in 2026?

The best choice depends on your specific requirements:

For beginners: Start with the simplest option that covers your core use case
For production: Choose the solution with the most active community and documentation
For teams: Look for collaboration features and user management
For privacy: Prefer fully open-source, self-hosted options with no telemetry

Refer to the comparison table above for detailed feature breakdowns.

Can I migrate between these tools?

Most tools support data import/export. Always:

Backup your current data
Test the migration on a staging environment
Check official migration guides in the documentation

Are there free versions available?

All tools in this guide offer free, open-source editions. Some also provide paid plans with additional features, priority support, or managed hosting.

How do I get started?

Review the comparison table to identify your requirements
Visit the official documentation (links provided above)
Start with a Docker Compose setup for easy testing
Join the community forums for troubleshooting

Advertise here

Why Self-Host Your Rendering Infrastructure

What These Tools Actually Do

Gotenberg: The Dedicated Rendering API

Docker Setup

Generate a PDF from HTML

Generate a PDF from a URL

Take a Screenshot

Merge Multiple PDFs

Production Hardening

Playwright: The Browser Automation Powerhouse

Installation

Docker Deployment

Screenshot Server with Playwright

PDF Generation with Playwright

Puppeteer: The Original Headless Chrome API

Installation and Setup

Docker Deployment

Generate PDF with Puppeteer

Screenshot with Puppeteer

HTML String to PDF (No URL Needed)

Feature Comparison

Performance Considerations

Scaling with Traefik

Real-World Use Cases

Invoice Generation Pipeline

Automated Visual Regression Testing

Social Media Preview Generator

Security Best Practices

Monitoring and Observability

Choosing the Right Tool

Frequently Asked Questions (FAQ)

Which one should I choose in 2026?

Can I migrate between these tools?

Are there free versions available?

How do I get started?

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