Blog
Practical, no-hype writing about how the PDF format actually works — and where it can bite you. I take apart PDF internals (what really happens when a file is converted to Word, how far the format can be pushed) and, above all, PDF security: how malicious PDF files are built, how encrypted documents are attacked, what metadata quietly leaks from your files, and how much digital signatures are really worth. Everything here follows the same principle as the app itself: your files stay on your computer. No affiliate links, no cloud upsell — just what I learn while building an offline PDF toolkit.
A high-school student ported the 1993 shooter into a PDF file that runs in a browser. It is a brilliant joke with a serious punchline — because the feature that makes it possible is sitting in every PDF you open.
The documents people most often convert are the ones with the most personal information in them — and a PDF carries more than what's printed on the page. Here's what to check before you drag a file onto a converter.