Last updated on
Dec 30, 2025
Annotate PDFs Online Using pdfFiller For 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.
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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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:
difficult to sign and other parties not knowing the software, I feel I need to be cautious. Too costly for a novice one time user. Overall, it has been helpful. thanks!
2015-12-15
It was easy to use. just having difficulty emailing and printing 25 page document. states processing 1 of 25 but bar is not loading. quite frustrating. been trying for 1.5 hrs now. tried emailing didnt work to print off of it either. ugh
2016-09-11
Excellent application, very smart it detects data entry fields and allows to add text to PDF document. So far I'm very satisfied with this application.
2017-12-16
I wish I didn't have to pay. I would have found another free site, like going to SSI site, but I had already filled in all the blanks and it was so time consuming that it wasn't worth the effort. I will cancel as soon as I get the bill.
2018-11-11
What do you like best?
Free ability to fill and sign documents from any computer
What do you dislike?
Inserting images is not intuitive, and no mechanism to copy-paste fields within and between documents.
Recommendations to others considering the product:
Use this!
What problems are you solving with the product? What benefits have you realized?
It is one of my most frequently-used online tools. It has spared me needing to have a scanner.
Free ability to fill and sign documents from any computer
What do you dislike?
Inserting images is not intuitive, and no mechanism to copy-paste fields within and between documents.
Recommendations to others considering the product:
Use this!
What problems are you solving with the product? What benefits have you realized?
It is one of my most frequently-used online tools. It has spared me needing to have a scanner.
2020-02-10
Easy And Fast PDF Form Filling Software!
Works with all types of devices, so I can prepare a document for signature quick and right where I am. Pricing is very fair.
It is sometimes a little slow and there is a bit of a learning curve but once those are overcome, it is practically flawless.
2018-06-19
Needed to edit doc urgently and was…
Needed to edit doc urgently and was able to do so with PDF FIller and the seamless interaction made for edited doc.
2021-12-03
I had an occasion to need a form filler…
I had an occasion to need a form filler on a PDF. I found PDFfiller online and tried it with a trail. It did exactly what I had wanted and it was easy to use. I guess I forgot to cancel the trial so it did go into an annual charge. I don’t need a PDF form filler on an ongoing basis. When I saw the annual charge on my PayPal account I called immediately. I explained what happened and they immediately said they would close the account and refund my money. No hassle just very polite support person and efficient. Should I ever have an ongoing need of a PDF form filler I will absolutely buy PDFfiller. It works and they believe in customer support. A rarity today.
2021-07-03
great experience!
great experience both using the software and the customer service,I highly recommend this to anyone needing the services they provide,
2020-09-15
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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