These tools allow you to underline, highlight, or strikethrough context without hassle. This is owing to the fact that it is 100% free and offers unparalleled annotating tools. PDFelement is the leading PDF annotator in the industry. It is used for bookmarking PDF pages for later use and is available in English, Italian, Chinese, and Polish.With Xodo, you can annotate PDF files with other people in real time.It allows you to auto-sync your PDF edits with OneDrive, Dropbox, and Google Drive.It helps you write on a PDF directly, underline and highlight text.It can be used for opening documents in formats such as Word, Excel, and PowerPoint. Xodo's smooth navigation and highly responsive PDF viewing technology enable you to write on a file in Portable Document Format directly. Using its impressive file sharing option, you can sync your files with Google Drive, OneDrive, and Dropbox. With the software, you can also fill in PDF forms. Xodo allows you to read, annotate, edit, sign as well as share PDF files. This is an all-in-one program with exciting capabilities as a reader & PDF annotator. The app is great for customizing PDF stamps by adding or texts.

It lets you view Bookmark, Outline, Thumbnail, Annotation Summary otherwise known as BOTA.PDF Markup supports every mainstream file format.It allows you to add highlights, sticky notes, text boxes, freehand writings, shapes, arrows, and others.It is a versatile document viewer and annotator.You can also use PDF Markup for customizing PDF stamps by adding either images or texts. It features top-notch file transfer, allowing you to copy files through iTunes USB, WiFi as well an Open-in feature. The software is used for sorting through loads of information, be it on the go, at home, or at work. It also lets you save your files via popular cloud service providers - the likes of GoogleDrive, OneDrive, Dropbox, Box, Evernote, WebDAV client, or FTP - directly from your iOS device (iPhone or iPad). With this software, you can add PDF annotations and write/sign on documents, highlight ePub books, or web pages. Developed by Kdan Mobile, Markup is a brand-new PDF Reader that is perfect for viewing, editing, annotating as well as organizing documents in Portable Document Format.

Android completely free notes app