Annotate PDF Online
Add annotations, comments, or highlights to PDFs online. Easy-to-use tool to mark up your documents and collaborate effectively.
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4.5/5 - (12,141 Votes)
Annotate PDF Files Online Quickly and for Free
Easily annotate your PDF documents with our online tool. Add comments, highlights, text boxes, and shapes to your PDFs to make your feedback clear and actionable. Perfect for business professionals, students, and anyone needing to review or edit PDF documents.
Simple and Powerful PDF Annotation Tools
Upload your PDF, select the annotation tools (highlight, text, shapes, etc.), apply them to your document, and download the annotated PDF in seconds.Add text comments, highlight sections, draw shapes, underline, and more. Perfect for collaboration and review.
Ideal for Reviewing, Collaborating, and Feedback
Whether you're reviewing documents, providing feedback, or marking important sections, this tool makes it easy to annotate your PDFs. Ideal for educators, business professionals, and students who need to communicate effectively through their PDFs.
Fast, Accurate, and Secure PDF Annotation
Annotate your PDFs quickly, even for larger files, without any delay.Apply your annotations precisely, ensuring that your changes are clear and professional.Your files are automatically deleted after conversion, ensuring the protection of your data and privacy.
Annotate PDFs on Any Device, Anytime
This tool works on all devices and platforms, including Windows, Mac, iOS, and Android. Whether you're on a desktop, tablet, or smartphone, you can annotate your PDFs easily from any device with an internet connection.
Free, Fast, and Convenient PDF Annotation
Annotate your PDFs for free, without needing to install software. This online tool is fast, easy to use, and perfect for adding comments, highlights, and other annotations to your PDFs—making it simple to review, share, and collaborate on your documents.
How to annotate a PDF
1.Choose the PDF document by clicking "Choose File" button.
2.Make the necessary changes — add text and shapes, highlight text, etc.
3.When finished, select 'Export' at the top-right and save your file.
PDF Annotator FAQs
Can I annotate PDFs for free?
Yes, you can easily annotate and mark up PDFs for free with PDFsail, both on the web and desktop platforms. Add comments, highlight important text, underline key points, or even draw freehand on your PDFs. To get started, open your PDF in PDFsail’s free online annotator, use the markup tools, and download the annotated PDF when you're done.
How to annotate PDF on Mac?
PDFsail's free online PDF annotator lets you annotate PDFs directly in your Mac browser. Easily insert comments, highlights, strikethrough text, and more, all without the need for additional software.
What apps can I use to annotate PDFs?
You can annotate PDFs on any mobile device with the PDFsail app for iOS or Android. View and mark up your documents on the go by adding text, comments, highlights, and more, all directly from your phone or tablet.
How to Annotate PDFs Without Adobe?
PDFsail offers a great alternative to Adobe Acrobat for annotating PDFs, and it works across web browsers, Windows, iOS, and Android devices. With PDFsail, you can easily add or replace text, insert comments, highlight text, draw shapes, and make freehand annotations—no Adobe required.