How to Make UP PDF Online Using Free PDF Annotator

PDF files are one of the most popular document file formats because it is very easy to view or read. You may also want to add extra text, graphics, shapes and other objects to your PDF. With that, you can try these online solutions to annotate PDFs for free.

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annotate pdfs online

Top 10 Free PDF Tools to Annotate PDFs Online


First on the list is the LightPDF. This is one of the best online PDF solutions that you can use in annotating PDFs.  With it, you can easily highlight and add comments while reading to get easily familiarized on the important details and add markings. Moreover, it is very simple yet professional to use that can work even without any expertise. Aside from that, it offers PDF editing, signing, OCR, speech to text, conversion from and to PDF, and a lot more.

lightpdf annotate pdf free

  1. Open LightPDF web pages from a browser, the online PDF tool is available on phones, tablets and computers.
  2. Click + to upload PDF files.

    upload pdf

  3. Make comments in your PDF with the annotation tool, like highlighting, underlining, etc.


  4. If you want to remove an annotation, double-click it and click the “Recycle Bin” button to remove it.

    remove annotation

  5. At last, click the “Save” button and download the edited file to your local computer

PDF Online (Xodo)

Another online PDF annotation tool is the Xodo. This online PDF tool lets you annotate PDF files by adding shapes, filling up forms and sign, forms measure, and so on. PDF files can be uploaded from your local drive, Dropbox, and Google Drive. Besides, edited PDF files can be saved easily.

PDF online xodo


Next on our list is the Foxit. This is an free PDF annotator that can be used anytime and anywhere using your desktop, mobile, and web.  By using the online tool, users can add up feedback to PDF by text mark up and commenting PDF tools. In addition to that, PDFs can be open and saved through cloud storage for convenient access. However, before using Foxit, you must register an account first.

PDF online xodo


An alternative way to mark up PDFs online is the Sejda.  It lets you edit, sign, and fill out PDFs for free. Also, users can change PDF text, add images, create links, edit hyperlinks, etc. Moreover, this program offers several PDF functions that you can choose from such as a sign, merge, convert, split, compress, add security, and other PDF functions.

sejda pdf


PDF Bob is included on our list. It comes with an easy-to-use feature on how to add annotation in PDFs. This includes typing text, add notes, highlighting text, and add some shapes and drawing other objects. Aside from that, you can manage pages by adding pages, files, deleting, copy and pasting PDF.

pdf bob

Soda PDF

Soda PDF is a PDF editor that offers a wide range of PDF functions that includes annotating PDFs. With it, users can easily change the order of their pages, remove and add new ones. Also, it can change text fonts style and size, add images, and align and adjust objects.

soda pdf

PDF Escape

PDF Escape is another PDF annotation tool that works on Google Chrome, Firefox, Opera Safari, and so on. Users can add text, image, whiteout, freehand, add link, and form field. Furthermore, it offers a drop and drops function to upload PDF files with ease. However, users can upload PDF files with a limit of 10MB and 100 pages only.

soda pdf


Smallpdf allows users to quickly add text and fill out PDF forms without having any trouble. Aside from that, you can annotate PDFsby adding various shapes and drawings. Users can import PDF files from PC and other cloud storage. Besides, this program is compatible with most platforms such as Windows, Mac, Linux, and mobile devices.



iLovePDF is an online PDF tool in one place. It can be annotation, merge, split, compress, convert, rotate, unlock, and a lot more. With its pdf editing function, users can annotate PDFsby adding text, shapes, comments, and highlight text. On the other hand, its free version has limited documents processing feature.



The last online PDF comment tool on our list is DocFly. It allows you to annotate and edit PDF documents in less than a minute. Furthermore, it can be utilized from your home, office or anywhere else web browser. However, it only allows you to edit up to 3 PDF files within a month for free.


Why do you need to annotate PDF?

PDF annotation is important for students, educators, businessmen, proofreaders,  and other individuals. Through this, It can help improve reading comprehension, find related research easily, proofreaders can make suggestions and comments quickly, help visualize information better, connect ideas, and so on. Also, it can be a great help in making notes when having a complex document.


PDF annotation is never been that easy without the solutions mentioned above. All of them can be used conveniently in annotating PDF files. With them, you can make your PDF even better.

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Posted byHenryon toPDF Tools,Follow me on Twitter.Last updated on January 14, 2022

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