Struggling to transfer ebooks to your Kindle? Here's the step-by-step process for moving EPUB, MOBI, and PDF files to both new and old Kindle devices via both USB and Amazon's cloud.

PDF Editify makes browser-based markups and utility tasks easy, but it remains limited as a full document editor.

You don’t need expensive software for basic PDF tasks. In fact, all you need is a handful of free web-based apps.