Free Tools
Check, convert, merge, compare, and export. Right in your browser.
No tracking. Just tools that work.
Website Trust Check
Check the DNS, email, SSL, and AI access signals that affect your site's credibility.
Word to PDF
Convert .docx files and images to PDF. Also exports as HTML, Markdown, and Word.
Merge PDF
Combine multiple PDFs into one file. Drag to reorder. One-click download.
PDF to Markdown
Convert one or many PDFs to clean Markdown for AI tools. Each file keeps its name. Download a .md or a .zip. No upload.
Compare Documents
Compare two PDFs, Word files, or text documents and highlight every change. Removed text in red, added in green. No upload.
Markdown to Word
Convert Markdown to clean Word (.docx) documents. Also exports as HTML and PDF.
Remove Markdown Formatting
Paste markdown from ChatGPT or Claude. Get clean text or formatted output. Free and instant.
Why we built free tools that never touch your files
In March 2025, the FBI Denver Field Office warned that criminals are using free online file converter sites to distribute malware. Sites that looked completely legitimate (and actually performed conversions) were silently installing info-stealers and ransomware on users' machines.
Even the "safe" conversion tools upload your files to their servers, run ad tracking on your document conversions, and have privacy policies that allow employee access to your files. Your tax return, your contract, your medical records. Processed on someone else's server, tracked by someone else's analytics.
We thought that was wrong. So we built something better.
How it works
Everything runs in your browser. Your files never leave your device. There's no server processing them. We couldn't see your files even if we wanted to. The one exception is the Website Trust Check: you give it a domain, not a file, and it looks up that domain's public records server-side. The file tools set a strict Content Security Policy that blocks outbound network requests: no fetch, no XHR, no WebSocket, no form submissions, no image beacons, no iframes. A security researcher can inspect the page source and verify.
What we don't do
No analytics. No cookies. No tracking. No ads. We didn't even put Google Analytics on this page.
We don't even use a PDF library for document conversion. Your browser makes the PDF. We just make the document look good.
Why we're giving this away
We're Surmado. AI for small business. We believe if you handle people's data, you should respect it. These tools are us putting that principle into practice. Before we ask for a dollar.
If you like how we think, check out what we're building.
Let’s Rebuild Your Website
Get a free rebuild to approve before your domain moves.