Discover GroupDocs.Viewer free online app!

Open and view DOCX, PPTX, XLSX, DWG, CSV, SVG, PPT, XPS, DWF, DXF, XLS, PSD and many more file and document formats online for free, see supported formats list.
Upload your Excel, Word, PowerPoint, AutoCad, Visio, and PDF documents and view them in your browser.
Open and view files from anywhere online for free - it works on all platforms including Windows, MacOS, Android and iOS.
All files are processed on our servers so no additional plugins or software installation is required.
All files are processed using GroupDocs.Viewer document view API.

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

How to view OTS files online

Click inside the file drop area to upload a OTS file or drag & drop a OTS file.
Once upload completes, you'll be redirected to the viewer application.
Scroll down or use the menu to navigate between pages.
Zoom-in or zoom-out page view.
Download source file pages in PNG or PDF format.

FAQ

❓ How can I open and view OTS file?

First, you need to upload a file: drag & drop your OTS file or click inside the white area to choose a file. Then you will be redirected to the viewer application.
⏱️ How long does it take to open OTS file?

The viewer app works fast. Typically it takes a couple of seconds to open a OTS file.
🛡️ Is it safe to view OTS files using free GroupDocs Viewer?

Of course! The preview files will be available instantly after the file uploaded. We will delete the uploaded file after 24 hours.
💻 Can I open & view files OTS on Linux, Mac OS, or Android?

Yes, you can use the free GroupDocs Viewer on any operating system that has a web browser. Our OTS viewer works online and does not require any software installation.
🌐 What browser should I use to view OTS files?

You can use any modern browser to view OTS files, for example, Google Chrome, Microsoft Edge, Firefox, Opera, or Safari.
</> What code is running on the server-side to render OTS files?

Detailed code examples are available at GitHub in the form of executable projects. If you are only interested in rendering OTS files then check .NET & Java examples.

Powered By

GroupDocs.Viewer for .NET API

Powerful document viewer .NET library & API.

Build your own multi-platform document and file viewer with our .NET library.

More Platforms

GroupDocs.Viewer for Java

Java version of GroupDocs.Viewer library & API.

Build your Java document viewer application with GroupDocs.Viewer for Java.

GroupDocs.Viewer Cloud

Easy to use cross-platform Cloud solution.

Or use our Cloud API to build your document and file viewer.

Open-Source UI/UX Solutions

GroupDocs.Viewer for .NET and Java

Integrate document viewer in your apps using our out-of-the-box open-source front-end solutions based on Angular and GroupDocs.Viewer for .NET/Java.

UI/UX solutions can be run as standalone applications or can be integrated in any .NET/Java application, download and build your viewer solution within a few clicks!

GroupDocs.Viewer MVC UI/UX Solution
GroupDocs.Viewer .NET WebForms UI/UX Solution
GroupDocs.Viewer Java Spring UI/UX Solution (Coming Soon)
GroupDocs.Viewer Java Dropwizard UI/UX Solution (Coming Soon)

GroupDocs.Total for .NET and Java

GroupDocs.Total UI/UX is an open-source solution where all GroupDocs products are working together as one.

GroupDocs.Total provides multiple high-quality features against most popular document formats, such as conversion, signature, parser, and much more!

GroupDocs.Total for .NET MVC
GroupDocs.Total for .NET WebForms
GroupDocs.Total for Java Dropwizard (Coming Soon)
GroupDocs.Total for Java Spring (Coming Soon)

View OTS Online

Open and view OTS documents online from any device for free.

OTS OpenDocument Spreadsheet Template