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  1. GroupDocs Products
  2. Annotation Apps
  3. Annotate Documents Online

Annotate Documents Online

Annotate, Comment and Tag your Document Contents for Efficient Collaboration Online for Free

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We have already processed 9,675 files with the total size of 9,095 MB.

About Annotation app

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.

Different file types allow users to annotate text. But processing files of a particular kind often requires specialized software that takes up a lot of space and sometimes is not free. However, you will not install a software package that is ten gigabytes or more and even pay for it to view one file. Also, you can get the file on your mobile phone, but many software packages still need mobile versions. Of course, you can get to the computer, but sometimes it takes time, and the computer may not have the necessary software.

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 files in the browser.

This free online application based on the GroupDocs.Annotation API annotates files on your device. We value your privacy, so the file is visible to you only. The application works on any device, including smartphones.

Video tutorial
File formats

Annotation app supported document formats

Microsoft Office Formats

  • Microsoft Word: DOC, DOCX, DOCM, DOT, DOTX, RTF
  • Microsoft Excel: XLS, XLSX, XLSM, XLSB, CSV
  • Microsoft PowerPoint: PPT, PPTX, PPTM, POTX, POTM, PPSM, PPS, PPSX
  • Microsoft Visio: VSD, VSS, VSDX, VST
  • OpenDocument: OTP, ODT, OTT, ODS, ODP

Other Formats

  • Portable: PDF (PDF/A-1a, PDF/A-1b, PDF/A-2a)
  • Images: BMP, GIF, JPG, JPEG, PNG, TIFF
  • AutoCAD: CAD, DWG, DXF
  • Metafiles: EMF, WMF
  • Email: EML, EMLX, MSG
  • Web: HTM, HTML
  • Others: DICOM, DjVu
How it works

How to annotate documents online

Step 1
Click inside the file drop area to upload a file or drag & drop a 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 file.
FAQ

Questions and Answers

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