New Zealand startup Notable PDF has created an online tool to help users collaborate and annotate PDFs online.

If you are wondering how to annotate a PDF on Windows, you can use free online tools and software that we have included in this article.

If you're looking for a quick way to edit or sign a PDF document, there are free and easy-to-use tools for iOS, Windows, and Android devices.

The reason I’m sticking to PDF Expert for my PDF needs, however, is very simple: it combines a fast engine with unique annotation tools that can be carried over to the Mac. PDF Expert takes seconds to ...

Office productivity apps in the Quickoffice suite get new set of features along with the PDF annotation tool.

Learn how to enable and use PDF editing tools in Firefox PDF reader. You can use Free Text Annotation tool and Ink Annotation tool in Firefox.

It was recently unearthed that Google has added a new slate of PDF annotation tools to the Chrome OS Canary and Developer channels. A flag that can be enabled lets users mark up PDF files in the ...

Online tool: Kami Over the last few months, Kami managed to become my go-to solution for PDF annotations. The web app connects to Google Drive, Microsoft OneDrive, Dropbox, and Box and pulls your ...

Google has integrated a PDF reader into the Chrome browser for Android. Annotation tools are also on board.