# Stop Uploading Sensitive PDFs to Random Websites

> Source: <https://dev.to/shahzaib11/stop-uploading-sensitive-pdfs-to-random-websites-4jgp>
> Published: 2026-10-11 12:06:31+00:00

Every time you upload a contract, medical record, or financial statement to a "free PDF tool" site, you're trusting a stranger's server with your most sensitive documents.

Here's what actually happens on most free PDF sites:

Modern browsers can do everything a server can for PDF work:

None of this needs a server. Your file never leaves your device.

PdfWord ([https://pdfwordtools.pages.dev](https://pdfwordtools.pages.dev)) runs 47 PDF tools entirely in your browser:

The only exception: AI tools send extracted *text* (not your file) to the AI. Everything else is 100% local.

Open DevTools → Network tab → upload a file → if you see your file in an upload request, it's going to their server. Check if it works offline (airplane mode) — if yes, it's truly client-side. Read the privacy policy — vague = red flag.

**If a free tool needs your file on their server to do something your browser can do alone, find another tool.**

Try it: [https://pdfwordtools.pages.dev](https://pdfwordtools.pages.dev) — disconnect your internet after loading, everything still works.

*47 free PDF tools. No signup. No server uploads. Building in public.*