Annotate PDF For Free

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Last updated on May 25, 2026

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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 do love and use this program alot but there are alot of little things that can be done to make it more user friendly
Lisa M
2015-09-14
I needed PDF Filler (or something like it) for a specific purpose and for a short time. It got the job done. I was surprised to see the Annual Fee ($72.00) show up on my credit card statement, instead of the monthly fee ($6.00). I cancelled my subscription on 4/11/2016, and have been checking my statements for a refund. Am I waiting in vain?
MICHAEL L. R
2016-06-05
useful and intuitive maybe a webinar later when I am not so swamped
Candi H
2017-04-12
I have found that there is a bit of a steep learning curve but once you have things figured out it is a very good progrea.
Don A
2017-09-01
Xlint product. works as advertised. A few more controls would be nice rotation of image/page.
Steven
2019-05-09
So great to be able to find, fill and print all the forms you need.
Anonymous Customer
2019-08-22
I used it once, and it worked great! But I don't need this all the time
Miranda M
2024-08-11
Easy to use and saved a lot of time Easy to use and saved a lot of time
SAAJID AS
2021-11-25
WENT GREAT WHEN I FIRST USED IT SHOWNING ME STEP BY STEP THEN WHEN I USED IT MYSELF I BECAME A MIND OF ITS OWN SOMETIMES TRYING TO UNDERLINE OR GO BACK TO CORRECT SPACES I MAY JUST NEED MORE TAINING
Anonymous Customer
2020-04-24

Instructions and Help about Annotate PDF For Free

Annotate PDF: make editing documents online a breeze

The PDF is a widely used file format used for business records because you can access them from any device. You can open it on any computer or smartphone running any OS — it'll appear same for all of them.

The next reason is security: PDF files are easy to encrypt, so they're safe for sharing data from person to person. That’s why it’s essential to choose a secure editor, especially when working online. Using an online solution, it's possible to get an access a view history to find out who had access to the file before.

pdfFiller is an online editor that allows you to create, edit, sign, and send PDFs using one browser tab. It is integrated with major Arms to sign and edit documents from Google Docs or Office 365. Forward it to others by email, fax or via sharing link, and get notified when someone opens and fills it out.

Use editing tools such as typing text, annotating, and highlighting. Once a document is completed, download it to your device or save it to cloud storage. Add images to your PDF and edit its appearance. Ask your recipient to complete the fields and request an attachment if needed. Add fillable fields and send to sign. Change a document’s page order.

Follow these steps to edit your document:

01
Browse for your document through the pdfFiller's uploader.
02
Proceed to editing features by clicking the Tools tab. Now you can change the document's content or add a new one.
03
Add input fields if you need any: pdfFiller supports text, checkboxes, radio buttons, dropdown lists etc.
04
When you've finished editing, click the 'Done' button and email, print or save your document.

Annotate PDF - Enhance Your Document Collaboration and Productivity

Our Annotate PDF feature is a powerful tool that allows you to seamlessly annotate and mark up your PDF documents. With this feature, you can transform your static PDF files into dynamic collaborative platforms, making it easier than ever to work together with your team on projects, documents, and presentations.

Key Features

Highlight and underline important text
Add comments and notes to specific sections
Draw shapes and freehand annotations
Insert images and stamps
Attach files and hyperlinks within the PDF

Potential Use Cases and Benefits

Collaboration: Easily share annotated PDFs with your colleagues and invite them to contribute their thoughts and feedback. Working together becomes more efficient and productive.
Review and feedback: Provide clear and concise feedback on proposals, contracts, reports, and other documents. Ensure everyone is on the same page and eliminate misunderstandings.
Document markup: Efficiently mark up PDFs for legal or academic purposes. Highlight essential information, cite references, or insert additional context directly into the document.
Presentation enhancement: Make your presentations more engaging and interactive by adding annotations, diagrams, and visual aids directly to your PDF slides.
Digital signing: Sign PDF documents electronically, saving time and eliminating the need for printing and scanning. Maintain a seamless workflow while ensuring document authenticity.

Our Annotate PDF feature empowers you to take full control of your PDF documents, enabling efficient collaboration, seamless communication, and streamlined document management. Unlock the true potential of your PDFs and elevate your productivity to new heights.

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 Use the Annotate PDF Feature in pdfFiller

The Annotate PDF feature in pdfFiller allows you to easily add comments, notes, and other annotations to your PDF documents. Follow these simple steps to make the most out of this feature:

01
Open the PDF document you want to annotate in pdfFiller.
02
Click on the 'Annotate' button located at the top of the toolbar.
03
A sidebar will appear on the right side of the screen with various annotation tools.
04
Choose the annotation tool you want to use, such as text, highlight, underline, or strikeout.
05
Click on the area of the document where you want to add the annotation.
06
Type your comment or note in the text box that appears.
07
Customize the appearance of the annotation by selecting different colors, fonts, or sizes.
08
Move or resize the annotation by clicking and dragging it to the desired location.
09
To delete an annotation, simply click on it and press the 'Delete' key on your keyboard.
10
Save your annotated PDF by clicking on the 'Save' button at the top of the toolbar.

With the Annotate PDF feature in pdfFiller, you can easily collaborate with others, provide feedback, and make important notes on your PDF documents. Start using this powerful tool today and enhance your document workflow!

Did you know?

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The editing tools in the Markup toolbar are ideal for collaborating. Use the tools to provide feedback or write down something you want to remember. You can change the redaction as you edit, but once you close the document, it becomes permanent. The tool may appear highlighted to show your device without using it.

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
Annotations are additional objects that can be added to a document. ... Annotations are essential in PDFs as the document format is not easily editable to make the text clearer. Many types of annotation are supported by PDF files including marking text, adding entirely new text and adding sticky notes. .
Go to View > Show Markup Toolbar or click the (sketch pen) icon on the top right. Use the selection and the markup tools annotate the PDF. You can use type, sketch, draw, use shapes, add notes, sign, and change the format for all. Click Done after you finish marking up the PDF.
Simply select Annotate Entire Note as PDF and Evernote converts the entire note into a single PDF page for you to annotate. Annotating an entire note as an annotated PDF is currently available on Evernote for Mac.
Start Adding Text to PDF Click the “Edit” tab to select the “Add Text” option on the toolbar. Then you need to click the blank section on the page where you want to add the text. You are able to add/insert sentences and words in the PDF content. Note that you can modify or make adjustments to the document if necessary.

Video Review on How to Annotate Pdf

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Best Meets Requirements- Summer 2025