Annotate PDF Online

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

PDF Portable Document

Portable Document Format (PDF) is a type of document created by Adobe back in 1990s. The purpose of this file format was to introduce a standard for representation of documents and other reference material in a format that is independent of application software, hardware as well as Operating System. PDF files can be opened in Adobe Acrobat Reader/Writer as well in most modern browsers like Chrome, Safari, Firefox via extensions/plug-ins.

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Free Document Conversion, Viewer, Merger app for Windows

Free Document Conversion, Viewer, Merger app for Windows

  • Easily convert, view or merge unlimited files on your own Windows PC.
  • Process Word, Excel, PowerPoint, PDF and more than 100 file formats.
  • No limit on file size.
  • Batch conversion of multiple files.
  • One app with rich features like Conversion, Viewer, Merger, Parser, Comparison, Signature.
  • Regular FREE updates with new features coming every month.
Free Download

Discover GroupDocs.Annotation free online app!

How to annotate PDF documents online

How to annotate PDF documents online

  • Click inside the file drop area to upload a PDF file or drag & drop a PDF file.
  • File will be automatically rendered for you to view instantly.
  • Scroll down to navigate between pages.
  • Add annotations to the document.
  • Download the annotated version of your PDF file.

FAQ

  • ❓ How can I annotate PDF document?
    First, you need to upload a file: drag & drop your PDF file or click inside the white area to choose a file. Then you will be redirected to the annotation application.
  • ⏱️ How fast can I start adding annotations to PDF document?
    The annotation app works fast. Typically it takes a couple of seconds to open a PDF document and prepare it for adding annotations.
  • 🛡️ Is it safe to annotate PDF files using free GroupDocs Annotation App?
    Of course! The preview files will be available instantly after the file uploaded. We will delete the uploaded file after 24 hours.
  • 💻 Can I annotate documents PDF on Linux, Mac OS, or Android?
    Yes, you can use the free GroupDocs Annotation on any operating system that has a web browser. Our PDF Annotation App works online and does not require any software installation.
  • 🌐 What browser should I use to annotate PDF documents?
    You can use any modern browser to annotate PDF documents, for example, Google Chrome, Microsoft Edge, Firefox, Opera, or Safari.

Powered By

 GroupDocs.Annotation for .NET API

Powerful document annotating .NET library & API.
Build your own document annotation management applications using our comprehensive set of APIs that allow you to annotate your documents!

More Platforms

 GroupDocs.Annotation for Java

Java version of GroupDocs.Annotation library & API.
Enjoy annotating your documents wherever Java lives!

 GroupDocs.Annotation Cloud

Easy to use cross-platform Cloud solution.
Our REST API helps you to develop cross-platform document annotator. Build tools for annotating all common business documents and image file formats.

Open-Source UI/UX Solutions

 GroupDocs.Annotation for .NET and Java

Integrate GroupDocs.Annotation functionality in your apps using our out-of-the-box open-source front-end solutions based on Angular and GroupDocs.Annotation for .NET/Java.
UI/UX solutions can be run as standalone application or can be integrated in any .NET/Java application, download and build your annotation solution within few clicks!

 GroupDocs.Total for .NET and Java

GroupDocs.Total is an open-source UI/UX solution where all GroupDocs products are working together as one.
GroupDocs.Total provides multiple high quality features against over 120 document formats, such as conversion, signature, parser and much more!