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Annotation Apps
Annotate Documents Online

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Annotation is a lightweight and powerful software which allows everyone to seamlessly modify documents with the capability to annotate them. Annotate your document completely free on any OS and platform using just your browser.

With Annotation software powered by GroupDocs you are allowed to annotate documents, leave comments, draw figures, calculate distances, highlight and mark up documents. With our annotator you can do it on PDFs, text documents, diagrams, excel sheets, presentations, images and even CAD files. The most popular annotation examples are highlighting, underlying, striking out text, adding watermarks and polylines.

Video tutorial

File formats

Annotation app supported document 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

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 & Answers

How can I annotate a document?

First, you need to upload a file: drag & drop your 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 annotating a document?

The annotation app works fast. Typically it takes a couple of seconds to open a document and prepare it for adding annotations.
Is it safe to annotate files using this Annotator?

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 on Linux, Mac OS, or Android?

Yes, you can use our annotator on any operating system that has a web browser. Our Annotation App works online and does not require any software installation.
What browser should I use to annotate documents?

You can use any modern browser to annotate documents, for example, Google Chrome, Microsoft Edge, Firefox, Opera, or Safari.

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About Annotation app

Annotation app supported document formats

Microsoft Office Formats

Other Formats

How to annotate documents online

Questions & Answers

Annotate Documents Online

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

About Annotation app

Annotation app supported document formats

Microsoft Office Formats

Other Formats

How to annotate documents online

Questions & Answers

GroupDocs online applications

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