What’s the biggest frustration you have when merging PDFs?

I’m curious what other people find most frustrating when working with PDF files.

For me, it was the combination of file limits, unnecessary signups, complicated interfaces, and having to go through several steps just to merge a few PDFs.

That was one of the reasons I built UniFicarPDF around a simple idea: select your files, arrange them in the order you want, and merge them without making the process complicated.

What’s your biggest pain point when working with PDFs? File limits, page ordering, privacy, speed, or something else?