Last updated on
Jan 19, 2026
Annotate PDFs Online Using pdfFiller For Free
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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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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.
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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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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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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What our customers say about pdfFiller
See for yourself by reading reviews on the most popular resources:
It was a wonderful experience. All the reps were competent, patient and more than willing to offer their assistance for any problem or any issue that I was confronting. And I am happy with the results
2019-10-07
What do you like best?
I like that it's pretty intuitive and easy to use.
What do you dislike?
Loading times are a little long sometimes.
What problems are you solving with the product? What benefits have you realized?
Processing of any kind of documents.
I like that it's pretty intuitive and easy to use.
What do you dislike?
Loading times are a little long sometimes.
What problems are you solving with the product? What benefits have you realized?
Processing of any kind of documents.
2019-01-28
What do you like best?
I enjoy the way PDF is easy to use and allows us to send out documents quickly. We operate a few different locations remotely and we are able to send out important documents require signatures in less than 5 minutes! Support is great when needed but we seldom have any issues.
What do you dislike?
There are not many issues with it. It would be nice to be able to copy/duplicate documents prior to merging so we do not have to upload them once again.
Recommendations to others considering the product:
If you work remotely, I highly recommend this program. We love being able to email employees and clients in a matter of minutes for documents requiring information on their behalf.
What problems are you solving with the product? What benefits have you realized?
We are solving travel time and time with paperwork with all of the documents be readily available with just a click. Prior to PDF, we were having to meet with new employees for paperwork. Now, we are able to email them and have them sent back for processing. Our time is being used in a for efficient manner.
I enjoy the way PDF is easy to use and allows us to send out documents quickly. We operate a few different locations remotely and we are able to send out important documents require signatures in less than 5 minutes! Support is great when needed but we seldom have any issues.
What do you dislike?
There are not many issues with it. It would be nice to be able to copy/duplicate documents prior to merging so we do not have to upload them once again.
Recommendations to others considering the product:
If you work remotely, I highly recommend this program. We love being able to email employees and clients in a matter of minutes for documents requiring information on their behalf.
What problems are you solving with the product? What benefits have you realized?
We are solving travel time and time with paperwork with all of the documents be readily available with just a click. Prior to PDF, we were having to meet with new employees for paperwork. Now, we are able to email them and have them sent back for processing. Our time is being used in a for efficient manner.
2020-02-03
It works. After dealing with another program for five years, that suddenly became dysfunctional as they upgraded, we are happy to have landed into your world.
2023-02-11
When I took the time to learn how to utilize the tools, I was very happy with my experience. Learn how to use the tools, and your experience with this website will be much better.
2020-12-23
Is there a way that 1 page can be…
Is there a way that 1 page can be flipped? sometimes there are documents that are written horizontally and there is no way to fill it in unless the sheet is rotated. If there is no way to do this then it should be. That is why one star is missing. otherwise great.
2020-09-11
Annotate PDFs Online
Sometimes, when completing a PDF form we don’t know the exact answer to a particular question or need feedback from the document recipient. In situations like this, you can add comments to PDF documents online using very simple tools. pdfFiller's simple but powerful document editor allows you to add comments anywhere in the document. In the past, you probably had to print the form and write your comments on the margins of the paper copy. Depending on your handwriting, the form might not have been very tidy and pleasant to look at. Now there is a far easier way to add comments to a PDF online and remove them when they are no longer needed. You can simply use pdfFiller’s editor to add comments to your PDF documents! To get started, you can upload a form to your account or open a document that’s already there. There are two ways to add your comments to a PDF document: text boxes and sticky notes. Select the Text Box tool
in the main toolbar, click where you want to place the box and type your comment. To resize the text box, drag its corners or edges. Change the font and its size by choosing from the drop-down lists.
You can underline, italicize or make your text bold using the respective tools.
Change position of the text using the vertical and horizontal alignment tools.
To change the color of your text, click the text color box and select the color you want.
To change the background color, click the Background icon and select the color from the palette.
To link the text box to a web page, click the Hyperlink button.
In the dialog window that will open next, type the URL of the web page, then click Save.
To delete the text box, click the trash can icon above it. To add a sticky note, select its icon
in the main toolbar, click where you want to place the note and type your comment. To resize the sticky note, drag its corners or edges. You can format text the same way as you format it in text boxes. To change the color of a sticky note, click the Box icon and select the color from the palette.
To learn more about how to add comments to PDFs online, please watch the following videos:
If you like being able to add comments to PDF documents, you might be interested in a lot of other great features that pdfFiller has to offer. Some of these include highlighting, blacking out or erasing text, drawing lines and arrows, and adding pictures. Check out these tutorials to see the other great things that pdfFiller can do for you!
Unlock the Power of Annotate PDFs Online Using pdfFiller
Are you tired of wasting time printing out PDFs just to annotate them by hand? Say goodbye to those days with pdfFiller's Annotate PDFs Online feature.
Key Features:
Effortlessly annotate PDFs directly in your web browser
Add comments, sticky notes, highlighting, and more with just a few clicks
Easily collaborate with others by sharing annotated PDFs online
Potential Use Cases and Benefits:
Streamline feedback and approval processes for documents
Improve communication and collaboration among team members
Save time and resources by eliminating the need for printing and scanning
With pdfFiller's Annotate PDFs Online feature, you can revolutionize the way you work with PDFs. Say goodbye to manual annotations and hello to a more efficient, effective way of collaborating and sharing feedback. Try it today and experience the difference for yourself!
How to Annotate PDFs Online Using pdfFiller
Annotating PDFs online using pdfFiller is a simple and efficient way to add comments, highlights, and other annotations to your PDF documents. Follow these step-by-step instructions to get started:
01
Access the pdfFiller website or open the pdfFiller app on your device.
02
Sign in to your pdfFiller account. If you don't have an account, you can easily create one for free.
03
Upload the PDF document you want to annotate. You can either drag and drop the file into the designated area or use the 'Upload' button to browse your computer or cloud storage for the file.
04
Once the PDF is uploaded, click on the 'Annotate' tab located at the top of the page.
05
Choose the annotation tool you want to use from the toolbar. pdfFiller offers a variety of annotation options, including text boxes, sticky notes, highlights, underlines, and more.
06
Click on the area of the PDF where you want to add the annotation. A pop-up window will appear, allowing you to customize the annotation's appearance and content.
07
After customizing the annotation, click 'Save' to apply it to the PDF.
08
Repeat steps 5 to 7 for any additional annotations you want to add.
09
Once you have finished annotating the PDF, click on the 'Done' button to save your changes.
10
You can download the annotated PDF to your device or share it with others by using the 'Save As' or 'Share' options.
11
If you need to make further edits or add more annotations later, you can always access the PDF in your pdfFiller account and continue annotating from where you left off.
By following these simple steps, you can easily annotate PDFs online using pdfFiller and enhance your document collaboration and review process.
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?
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What is pdfFiller?
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.
What browsers do pdfFiller.com support?
pdfFiller.com supports Internet Exporter (IE), Google Chrome, and Mozilla Firefox.
Do I need to download or install any software?
No downloads needed! pdfFiller.com is web-based application that does not need any additional software. pdfFiller.com supports any browser.
Can I edit a PDF document online?
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.
How to annotate PDFs?
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.
How to add an annotation in PDF?
To add an annotation in PDF, upload your document to pdfFiller, or choose the document your want to annotate in “My Forms” page and click “Fill” button. You can highlight text or add comments, sticky notes or underlines in your PDF document, application form, license form, contract document or certificate file online. 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.
Can I add annotations in PDF?
Of course you can. To add an annotation in PDF, upload your document to pdfFiller, or choose the document your want to annotate in “My Forms” page and click “Fill” button. You can highlight text or add comments, sticky notes or underlines in your PDF document, application form, license form, contract document or certificate file online. 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.
How do I annotate PDF application form?
To add an annotation in PDF, upload your forms to pdfFiller, or choose the form your want to annotate in “My Forms” page and click “Fill” button. You can highlight text or add comments, sticky notes or underlines in your PDF application, license or certificate form. 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.
Where can I annotate PDF online?
You can annotate PDF documents online using pdfFiller. Upload your contracts to pdfFiller, or choose the contract your want to annotate in “My Forms” page and click “Fill” button. You can highlight text or add comments, sticky notes or underlines in your PDF contracts. 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. No downloads or installation needed. You can work on annotating your PDFs with pdfFiller's cloud technology and web-based service using any device from anywhere.
How do I write on a document?
To write on a document, click anywhere on the document and begin typing.
Can I type multiple lines when I have a lot of text?
Yes. Just use “Enter” to create a line break. You can also paste large chunks of text and use Enter to restructure the lines.
How do I edit font settings?
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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