PDFerret Blog

Guides and explainers on merging, compressing and converting PDF files safely.

How to merge PDF files (without uploading them)

A step-by-step guide to combining multiple PDF files into one document, locally in your browser, with no uploads and no limits.

2026-08-31

How PDF compression actually works (lossless vs. strong)

Why some PDFs shrink by 80% and others barely move: an honest explanation of lossless optimization and rasterization.

2026-08-31

The hidden privacy risk of online PDF tools

Every time you upload a document to a 'free' converter, a copy lands on someone else's server. Here is what actually happens, and how to avoid it.

2026-08-31

Where Does Your PDF Go? How PDFerret Differs from Typical Online PDF Tools

You want to merge two PDFs. You open an online tool, drop your file, click a button. Simple. But have you ever stopped to think about where that file goes in between?

2026-09-01