We have posted several topics about adding something to PDF, such as text, text box, image, page number, signature, password, stamp, watermark, hyperlink, etc. In this post, let’s share how to add comments to PDF. We will take three perspectives: online, Mac and Windows.
Before I give practical solutions to make comments on PDF, I’d like to give some advice to some users who are wondering “why can’t I add comments to a PDF?”. There are two general situations: your file has an open password or permission password added. You can add comments freely on a PDF if you open the file with a password and unlock edited permissions. You can also open it with a PDF password remover if you forget the password.
After answering this question, it’s time to move on to the main text.
Cisdem PDFMaster
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We gathered that users were most interested in adding comments to PDF for free, so we put it in the first section. In fact, there are quite a few options. But if you want a tool with few restrictions, all-round and safe, it still takes time. Here, our mission is to quickly filter out such a tool for everyone.
There are several ways to add comments to PDF in Google Chrome: use PDF online annotators, add extensions to Chrome or use Google Drive. Here we pick an online annotator to add comments to PDF in a breeze.
DocHub is one of the efficient PDF annotators that provides complete solutions to make comments/notes, annotate PDF, rearrange PDF pages, add text, draw, add signatures, add watermark and create reusable form templates. DocHub integrated many apps and software such as Google Workplace, Google Drive, Gmail, Google Contact, Dropbox and OneDrive, which committed to providing more comprehensive services to users.
Perhaps you’ve already downloaded a PDF program on your Windows, or you have never tried PDF programs offline. In this part, there are free methods without downloading software on Windows, offline software for free and all-around PDF tools for paid use.
Cisdem PDFMaster is the best PDF annotator to add comments to PDF on Windows.
Why? Cisdem is designed to help every user complete PDF-related tasks, whether you are a student or employee, a beginner or professional, it is committed to creating a set of high-quality annotation tools for everyone. It covers more than 30 tools that ensure you to edit text, annotate PDF, convert PDF to popular formats, compress PDF, protect PDF, unlock password, split files, manage pages, etc.
It is really appreciated that Cisdem has brought multi-purpose features in one app.It has made the way of viewing and managing PDF files smoothly and effectively. — Carmelo from Mac App Store
An all-in-one PDF toolset, which saves me tons of time to handle the PDF files. Although most of my time, I use convert and edit only, I don’t mind owning a complete one at this affordable price. — Rynwest from MacUpdate
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Then enter some text in the comment window that pops up on the page. You can also change the color and opacity of the sticky note. 
Other annotating options include highlight, strikeout, underline, text box, free hand, stamps, signatures, crop, images, date, shapes or text callout.PDF-XChange offers two products in editing: PDF-XChange Editor and PDF-XChange Editor Plus. The latter develops richer and advanced features like enhanced OCR engine, comparing documents, creating dynamic stamps, etc. For the majority of users, PDF-XChange Editor is enough to solve the needs.
Current version: 9.4.364.0
Supported operating systems: Windows 10, 8, 7
Limitations: Watermarks will be placed on all the pages when you use the free version. That’s a real problem.
In this part, we will tell Mac users how to add comments to PDF on the device.
#1 Add Comments to PDF in Adobe Reader
We guess you won’t want to miss Adobe, so we prepared a tutorial to add comments to PDF in Adobe Acrobat Reader DC. Usually, users who want to use adobe’s products are required to pay expensive membership fees. But as a basic PDF product, this software allows everyone to view, print, sign, share and make comments on PDF. To explore more advanced features such as editing text, you need to upgrade to Acrobat Pro.
It doesn’t matter if Adobe Reader isn’t on your device, because Preview brings a richer annotation tool than that. We like Preview because it is much more useful and practical than you think. Most tools add comments to PDF by adding sticky notes. Here, Preview provides new ideas for everyone.
Methods 1:
Methods 2:
It’s time to pick your best annotator at the end of the article. If you think Preview and Adobe Reader are not the best choice to add comments to PDF, and are concerned about the watermark limitation of PDF-XChange Editor, Cisdem PDFMaster can be your ultimate PDF solution.
Connie Yu has been a columnist in the field of data recovery since 2011. She studied a lot of data loss situations and tested repeatedly to find a feasible solution tailored for each case. And her solutions are always updated to fix problems from the newest systems, devices and apps.
