Add Comments to a PDF For Free

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Fill out, edit, or eSign your PDF hassle-free
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Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
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Every PDF tool you need to get documents
done paper-free

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Create & edit PDFs

Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.
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Fill out & sign PDF forms

Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.
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Organize & convert PDFs

Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.
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Collect data and approvals

Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.
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Export documents with ease

Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.
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Store documents safely

Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.

Customer trust by the numbers

64M+
users worldwide
4.6/5
average user rating
4M
PDFs edited per month
9 min
average to create and edit a PDF
Join 64+ million people using paperless workflows to drive productivity and cut costs

Why choose our PDF solution?

Cloud-native PDF editor

Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.

Top-rated for ease of use

Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.

Industry-leading customer service

Enjoy peace of mind with an award-winning customer support team always within reach.

What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
i love the copy feature so I can duplicate forms and just change the dates instead of filling out the whole form again when everything else stays the same.
Andrea G
2017-01-16
I have enjoyed the ease of the program but I there are things I need to know. I'd like to be able to alphabetize my patients and store them more easily.
Cherry M
2017-01-19
2 things I would like to see changed. The original custom color selector was better than the these presets that are available now. The other is the sizes of the font jump by twos, an input to put in a custom font size would be great
Juan
2017-08-01
I am really new at trying this out. The fax feature sounds like it would be very useful to me. I am very interested in learning about all the features offered through this service.
LYNDA G
2018-02-20
The program is easy to use for searching for forms or updating my own documents. The program is easy to understand and use. It is intuitive for anyone used to editing documents or creating forms. I would prefer better opportunities to edit changes while in the same document. It can be challenging to erase and re-enter information.
Jennifer M.
2017-11-14
Solid, provides the service you need Easy to use. Mostly used for inserting signatures. Sometimes the signature block format gets distorted (inserts as a code).
Constantine H.
2022-12-30
Phenomenal Customer Service Due to the pandemic, like a lot of people I was forced to work from home. My employer doesn't adequately support us in this task and so one day as a matter of urgency I started the free pdfFiller trial for a month. I set a reminder to cancel my subscription but I didn't complete the cancellation. When the annual subscription fee was taken from my bank account I was devastated, it's a deduction I couldn't afford and my employer would not reimburse me. The team at pdfFiller were amazing. They ensured I successfully cancelled the subscription and they also processed a refund. The speed of response was phenomenal, their empathy towards someone who genuinely could not afford the subscription was so appreciated. Their customer service is like nothing I have experienced before. Keep up the great work.
Deirdre Montgomery
2022-02-18
Great! Just don't have the finances to pay for it! Great, handy wee programme, shame I don't have the finances to pay for it but if I did - I would
H MOORE
2020-08-13
I love the way you can use the PDFfiller I love the way you can use the PDFfiller. It helps me with documents that I have to fill out for different programs that I'm in for my granddaughter because she is Autistic.
Shirley A.
2020-05-01

How to Add Comments to PDF

pdfFiller's simple, yet powerful editor allows you to add comments anywhere in your document. To add a comment, select the Comment button in the main toolbar.
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Press the blue Add comment button and click on the text or image you want to comment on.
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Type your comment in the text field and click Comment.
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To edit, delete or reply to a comment you’ve added, click More and select Edit, Delete or Reply.
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Click Save when you've finished editing a comment. Click Reply when you've finished adding your response to a comment. To delete a comment, click Delete and then OK to confirm your action. To resolve a comment, click Resolve. This will remove the comment.
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How do I Add Comments in PDFs?

01
Open your document in the pdfFiller editor
02
Press the blue Add comment button
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Click on the text or image you want to comment on
04
Type your comment in the text field
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Click Comment
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Click More to edit, reply or delete your comment

Add Comments to a PDF Feature

Our Add Comments to a PDF feature is a game-changer, allowing you to effortlessly add comments to your PDF files with ease.

Key Features:

Annotate PDFs with text, shapes, and drawings
Highlight important sections for better understanding
Add sticky notes for additional context

Potential Use Cases and Benefits:

Easily collaborate with colleagues by leaving feedback directly on the document
Streamline review processes and provide clear instructions
Improve communication and clarity in team projects

With our Add Comments to a PDF feature, you can say goodbye to endless email chains and confusion. This tool is designed to make your workflow smoother and more efficient, helping you solve your customer's problem of effective collaboration and communication.

Get documents done
from anywhere

Create, edit, and share PDFs even on the go. The pdfFiller app equips you with every tool you need to manage documents on your mobile device. Try it now on iOS or Android!

How to Add Comments to a PDF with pdfFiller

Adding comments to a PDF document can help you provide feedback, make notes, or collaborate with others effectively. With pdfFiller, you can easily add comments to any PDF file. Follow these simple steps to use the Add Comments to a PDF feature:

01
Open the PDF file in pdfFiller. If you don't have an account, sign up for a free trial or log in to your existing account.
02
Once the PDF is loaded, click on the 'Comments' tab located on the left side of the screen.
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Choose the type of comment you want to add. pdfFiller offers various comment options, including text boxes, sticky notes, highlighters, and more. Select the appropriate tool from the toolbar.
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Click on the area of the PDF where you want to add the comment. A comment box or annotation will appear at that location.
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Type your comment or note in the comment box. You can customize the font, size, color, and other formatting options using the toolbar at the top.
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If you want to reply to an existing comment, click on the comment and then click the 'Reply' button. Enter your response in the reply box that appears.
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To delete a comment, click on it and then click the 'Delete' button. Confirm the deletion if prompted.
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You can also move or resize the comment box by clicking and dragging its edges.
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Once you have added all the necessary comments, click the 'Save' button to save the changes to the PDF.
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If you want to share the PDF with others, click the 'Share' button and choose the desired sharing option, such as email, link, or social media.
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Congratulations! You have successfully added comments to a PDF using pdfFiller. You can now review, edit, or share the annotated PDF as needed.

Adding comments to a PDF has never been easier with pdfFiller. Start using this powerful feature today and enhance your document collaboration experience!

Did you know?

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Microsoft Edge has added a sticky note-like user interface to the built-in PDF reader feature. Microsoft Edge is now a Chromium-based browser with a number of exclusive features like Read Aloud and services tied to Microsoft instead of Google. The browser has already received a few updates, with support for ARM64 devices in Edge Stable 80.
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Commenting tools do not alter the original content of the PDF document, and comments are not displayed in the printed document. Comments may address certain parts of the document that require changes, or be used as a part of collaborative work on the document to tell other authors your thoughts and opinions. In Master PDF Editor, you can view comments and export and import them.

For pdfFiller’s FAQs

Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.
What if I have more questions?
Contact Support
pdfFiller is a web-based PDF editor. With pdfFiller, you can search for, edit, store and export PDF documents online without downloading and installing any software. pdfFiller also allows you to access and modify your PDF documents from any device anytime.
pdfFiller.com supports Internet Exporter (IE), Google Chrome, and Mozilla Firefox.
No downloads needed! pdfFiller.com is web-based application that does not need any additional software. pdfFiller.com supports any browser.
Yes. pdfFiller.com allows you to edit (modify, alter, correct, change, amend, revise, redact) any document with our various tools and features. You can rearrange, rotate, and delete, the pages. You can also, add text, images, and signatures to each page.
To annotate PDF documents, upload your document to pdfFiller, or choose the document your want to annotate in “My Forms” page and click “Fill” button. Open “Draw” tab and access the editor toolbar, you can have a variety of annotation features: highlight text, add comments, underline text and insert sticky notes or arrows.
To write on a document, click anywhere on the document and begin typing.
Yes. Just use “Enter” to create a line break. You can also paste large chunks of text and use Enter to restructure the lines.
To edit font settings, begin by clicking on the “Font” button. You can then change the font type, adjust the size and color. Furthermore, you can also, modify text in to bold, underline, and italics.

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Try the PDF solution that respects your time.
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025