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Can’t Comment on PDF – Solutions to Add Comment

Published By Nilesh Kumar
Debasish Pramanik
Approved By Debasish Pramanik
Published On November 14th, 2023
Reading Time 4 Minutes Reading
Category PDF Tips

Struggling to add comments to a PDF document? You’re not alone. This article explores all the possible reasons behind this issue and provides effective solutions for each. No matter the cause behind “Can’t comment on PDF” issue, we have a proper step-by-step guide to resolve them all.

Table of Contents:

It is a common requirement to add comments to a PDF document. After all, commenting helps in collaboration and feedback purposes. However, there are instances where users can’t comment on a PDF leaving them perplexed. Let’s dive into the reasons behind this problem and explore effective solutions.

All Reasons Behind Unable to Add Comment to PDF

The reasons behind this problem can be many. However, it can be narrowed down to the following:

  1. Document Restrictions: Document creators often set specific restrictions to prevent editing or commenting. These restrictions are a common cause of the inability to add comments.
  2. Outdated Software: Using outdated or incompatible PDF viewer software may not support the commenting feature.
  3. Open-Password: Password-protected PDF files can limit commenting. Users need the document’s password to enable this feature.
  4. Corrupted PDF File: A corrupted PDF can lead to various issues, including problems with adding comments.
  5. Scanned PDF: Scanned PDF documents are essentially images and do not support native commenting.

Can’t Comment on PDF Due to Restrictions – Most Common Issue

Document restrictions are a common cause of the inability to add comments to a PDF. Here, we’ll discuss two effective methods to address this issue.

Method 1: Professional Tool

  • Launch the software and click Add File to import the restricted PDF.

add pdf file

  • Select the destination path for the output PDF file.

change pdf destination

cant add comment to pdf

  • Once the process is complete, open the new PDF in PDF editor.

adobe pdf document properties

Now users should be able to add comments without any restrictions.

Method 2: Use Adobe Acrobat to Fix Can’t Add Comment to PDF Issue:

  • Open the PDF document in Adobe Acrobat.
  • Navigate to the File menu and select Properties.
  • In the Document Properties dialog, go to the “Security” tab.
  • Click on Show Details to view the security settings.
  • Enter the document password if required.
  • Under Security Method, select No Security from the drop-down menu.
  • Click OK to save the changes.

Now the PDF should be free of restrictions, allowing users to add comments using Adobe Acrobat.

Other Reasons & How to Resolve Them

For issues related to other reasons behind can’t comment on PDF document issue. These are the other reasons and solutions for them.

Reason 1 – Update Software

Make sure that the PDF reader or editor is up to date. Update it if not.

Reason 2 – Repair PDF

If the PDF is corrupted, try repairing it using PDF repair tools. If repair fails, consider recreating the PDF from the source document.

Reason 3 – Enter Password

For password-protected PDF documents, enter the correct password to enable commenting and editing functions.

Reason 4 – Software Troubleshooting

Users need to clear their browser’s cache if they are using online services. Try using different PDF reader or editor software to see if the issue persists.


The inability to comment on a PDF can be frustrating but it’s a solvable issue. By identifying the root cause of the problem, users can apply the appropriate solution. No matter the reasons, when a user can’t comment on PDF, the above-defined solutions will definitely help out.

FAQs – Can’t Comment on PDF

Q – Why can’t I add comments to some PDF documents?

The inability to add comments to PDF files can be due to various reasons, such as document restrictions, outdated software, password protection, or issues with the PDF itself. This article provides solutions to address these issues.

Q – What should I do if I encounter a corrupted PDF?

If the PDF is corrupted, users can use PDF repair tools to attempt to fix the issues. If it fails, then recreate the PDF document.

Q – How can I check if my PDF is scanned or image-based?

Open the PDF in Adobe Acrobat, and go to the View > Tools > Recognize Text > In This File to perform OCR. If it is successful, the PDF was likely scanned or image-based.


By Nilesh Kumar

As a Chief Technical Writer, I know the technical issues faced by home and professional users. So, I decided to share all my knowledge via this blog. I love to help you with challenges while dealing with technical jargon.