Free Document Tools

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. We 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 accounts. No email capture. 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. We build AI-powered marketing intelligence for agencies and small businesses. 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.

Don't trust us? Read the source. These tools are open source.