1. GroupDocs Products
  2. Annotation Apps
  3. Annotate PDF

Annotate PDF online

Annotate, Comment and Tag your PDF file for Efficient Collaboration Online for Free

Powered by groupdocs.com and groupdocs.cloud.

We have already processed 208 files with the total size of 61 MB.

About Annotation app

PDF is a file format that preserves the original layout and formatting across different devices and platforms. It is widely used for sharing documents, publishing e-books, and presenting reports due to its consistency and ability to preserve the document's integrity. PDF files can contain text, images, hyperlinks, and interactive elements, and they support encryption and digital signatures for enhanced security.

Annotations allow users to collaborate, review documents, and add information according to context. They enable reviewers to offer feedback, editors to propose changes, and collaborators to communicate without modifying the original text.

GroupDocs.Annotation is a fast and efficient API to annotate documents of over 35 different types. Powered by a high-performance cloud-based GroupDocs server, it allows annotating the PDF files in the browser.

This free online application based on the GroupDocs.Annotation API annotates the PDF files on your device. Even if your file is encrypted, you can enter a password and view the file. We value your privacy, so the file and the password you specified are visible to you only. The application works on any device, including smartphones.

Video tutorial
How it works

How to annotate PDF documents online

Step 1
Click inside the file drop area to upload a PDF file or drag & drop a PDF file.
Step 2
File will be automatically rendered for you to view instantly.
Step 3
Add annotations to the document.
Step 4
Download the annotated version of your PDF file.

Questions and Answers

More apps