"do2pdf" is a command-line utility designed primarily for security researchers, penetration testers, and malware analysts. Its primary function is to convert various document formats—specifically those often used as attack vectors (such as Microsoft Word .doc/docx, Excel .xls/xlsx, PowerPoint, and HTML files)—into safe, flat PDF files.
This write-up explores the tool's purpose, technical mechanism, use cases, and security implications.
console.log("Generating PDF...");
await convertToPdf(markdownContent, "./daily-report.pdf",
format: "A4",
margin: "1cm",
title: "Daily Ops Report"
);
console.log("✅ PDF saved!");
</code></pre>
<p>Run it:</p>
<pre><code class="language-bash">deno run --allow-read --allow-write generate_report.ts
</code></pre>
<h3>Pro Tips for Best Results</h3>
<ol>
<li><strong>Use explicit headings</strong> (<code>#</code>, <code>##</code>, <code>###</code>) – DO2PDF uses them to create logical page breaks and a table of contents (if enabled).</li>
<li><strong>Avoid extremely wide tables</strong> – The PDF renderer paginates horizontally, but it’s best to keep tables simple.</li>
<li><strong>Set margins via the CLI</strong>:
<pre><code class="language-bash">do2pdf --margin "0.75in" doc.md doc.pdf
</code></pre>
</li>
<li><strong>Combine with <code>--watch</code> in development</strong> (Deno built-in):
<pre><code class="language-bash">deno run --allow-read --allow-write --watch mod.ts input.md output.pdf
</code></pre>
Every time you change <code>input.md</code>, a new PDF is generated. Instant feedback.</li>
</ol>
<h3>Limitations (Honest and Clear)</h3>
<p>No tool is perfect, and DO2PDF is not a replacement for Adobe Acrobat or LaTeX. It does <strong>not</strong> support:</p>
<ul>
<li>Complex vector graphics (SVGs with embedded scripts).</li>
<li>Form fields or interactive PDF elements.</li>
<li>Password-protected or encrypted PDFs.</li>
<li>Non-Latin font fallback for rare scripts (though UTF-8 is well-supported).</li>
</ul>
<p>If you need those features, reach for Playwright or <code>wkhtmltopdf</code>. For everything else, DO2PDF is faster and simpler.</p>
<h3>Real-World Use Cases</h3>
<ul>
<li><strong>CI/CD Documentation</strong> – Auto-generate a PDF release notes from <code>CHANGELOG.md</code> on every tag push.</li>
<li><strong>Serverless PDF APIs</strong> – Deploy a Deno Deploy function that accepts Markdown and returns a PDF (since Deno Deploy supports <code>--allow-read</code>/<code>--allow-write</code> on the file system? *Check the limits – but for local microservices, it’s perfect.)</li>
<li><strong>Static site generation</strong> – Alongside Lume or Deno’s SSG tools, generate PDF versions of every blog post.</li>
<li><strong>Email attachments</strong> – Convert a database report to PDF and attach it via Deno’s SMTP library.</li>
</ul>
<h3>Conclusion: Small Tools, Big Impact</h3>
<p>DO2PDF won’t trend on Hacker News as the “next big thing.” But that’s the point. It’s a focused, well-crafted utility that respects your time, your data, and your workflow. If you’re a Deno developer who has ever wasted 20 minutes fighting headless browser timeouts or dodgy online converters, <strong>DO2PDF is for you.</strong></p>
<p>Try it today. Convert one Markdown file to PDF. Then add it to your <code>deno.json</code> tasks. You’ll wonder how you lived without it.</p>
<hr>
<h3>Resources & Next Steps</h3>
<ul>
<li>🔗 <strong>GitHub Repository:</strong> <a href="https://github.com/example/do2pdf">github.com/example/do2pdf</a> <em>(placeholder – replace with actual)</em></li>
<li>📦 <strong>Deno Registry:</strong> <code>deno.land/x/do2pdf</code></li>
<li>🐦 <strong>Author on Twitter:</strong> <a href="https://twitter.com/yourhandle">@yourhandle</a></li>
</ul>
<p><strong>Enjoy zero-hassle PDFs from Deno.</strong> Have a cool use case? Share it in the comments below!</p>
<hr>
<p><em>Note: DO2PDF is an example tool name for this blog post. If you need a real implementation, consider using Deno with <code>puppeteer</code> (headless Chrome) or <code>@react-pdf/renderer</code> via <code>npm</code> specifiers. The post structure remains valid for any similar tool.</em></p>
You can adapt the technical specifics if do2pdf refers to a different file type in your context. do2pdf
> prefixMost document-to-PDF conversion tools rely on LibreOffice (or OpenOffice) running in "headless" mode. This means the office suite runs without a graphical user interface (GUI), driven entirely by command-line arguments.
DO2PDF is a command-line tool and programmatic library designed specifically for the Deno ecosystem. Its name says it all: do2pdf: A Security Researcher's Tool for Document Conversion
At its core, DO2PDF bridges the gap between your raw content (like a README.md or an API report) and a polished PDF. It uses Deno’s native permissions system to safely read your input files and write out a PDF without unnecessary bloat.
do2pdf ./report.html final-report.pdf
DO2PDF uses a simple embedded HTML-to-PDF engine. For complex CSS Grid/Flex layouts, you may still need headless Chrome. But for documentation, invoices, or resumes? It’s flawless. Daily Metrics Report
You might be tempted to use a website that converts files to PDF for free without installing software. However, there are distinct advantages to using doPDF instead of online tools:
