OTG Viewer for Android - Open Graphic Template Files

OTG is the OpenDocument graphic template format used by LibreOffice Draw and Apache OpenOffice Draw. Such a template carries page setup, styles and reusable shapes for vector drawings - org charts, floor plans, diagrams - so that new drawings are consistent from the start. The format is part of the OASIS OpenDocument standard.

On an Android device with no LibreOffice installed, an OTG attachment cannot normally be opened at all. GroupDocs.Viewer Cloud renders it regardless: template pages are returned by the REST API as JPG, PNG, HTML or PDF for your app to show, and zoom, thumbnails and page navigation are included.

An Android SDK for Java includes samples for the common tasks, from rendering a whole file to picking individual pages, and Gradle or Maven installs it. ODG drawings and 180+ other formats reach this same service. When only a look is wanted, the free viewer on the web displays OTG in a browser, developers can exercise every endpoint in the API Explorer, and a first project runs on the free trial.


  • View OTG Online via Node.js
  • View OTG Online via .NET
  • View OTG Online via PHP
  • View OTG Online via cURL
  • View OTG Online via Ruby
  • View OTG Online via Python
  • View OTG Online via Go
  • View OTG Online via Java

OTG Viewer for Android - Open Graphic Template Files

View OTG and other Popular Formats for Free

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How to view OTG file online

  • Select the file by clicking the OTG App or simply drag & drop a OTG file.
  • Click the Open button to upload and view OTG file.
  • That is all! You can view your OTG document online.

Frequently Asked Questions

How secure is the document viewing process in GroupDocs.Viewer Cloud?

GroupDocs.Viewer Cloud ensures a secure document viewing process with data encryption, secure protocols, and adherence to data protection standards.

How can I integrate GroupDocs.Viewer Cloud into my application?

Integration is done through APIs provided by GroupDocs.Viewer Cloud. The service offers APIs for different programming languages and platforms, making it convenient for developers to incorporate document viewing capabilities into their applications or websites.

I want to create my own app that can view OTG file online?

Check our Cloud SDKs at GitHub if you are looking for the source code to view OTG file format in the Cloud.

What features does GroupDocs.Viewer Cloud offer?

GroupDocs.Viewer Cloud provides various features, such as zooming, paging, searching within documents, text selection, and rendering options. You can render specific pages, generate document thumbnails, or even render documents as images.

Is there an Android library for GroupDocs.Viewer Cloud?

The Java SDK serves that role. Add it through Gradle or Maven, initialize it with your credentials, and one method returns the rendered pages of any uploaded file - markup for a WebView, images for an ImageView.

Are there SDKs available for GroupDocs.Viewer Cloud APIs?

Yes, GroupDocs provides SDKs for various programming languages to simplify the integration and utilization of Viewer Cloud APIs in your applications.

What file formats are supported by GroupDocs.Viewer Cloud APIs?

GroupDocs.Viewer Cloud APIs support a wide range of file formats including PDF, Word, Excel, and more.

Is there a limit on the number of document views I can generate using GroupDocs.Viewer Cloud APIs?

GroupDocs.Viewer Cloud APIs offer flexible limits on the number of document views based on your subscription plan. Contact GroupDocs support for more details on view limits.

What document formats does GroupDocs.Viewer Cloud support?

GroupDocs.Viewer Cloud supports a wide range of document formats, including PDF, Microsoft Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX), images (JPEG, PNG, GIF, TIFF), and more.

Are there any limitations or usage restrictions with GroupDocs.Viewer Cloud?

GroupDocs.Viewer Cloud has certain usage limits depending on the subscription plan you choose. These limits may include the number of API requests, document size, or the number of concurrent connections. Its recommended to review the pricing and plans to understand the specific limitations.

Do I need LibreOffice to open an OTG template?

No. A browser plus the free online viewer shows the file, and inside an application the REST API produces those pages on request. No LibreOffice or OpenOffice installation is needed.

OpenDocument Graphic Template (.otg) (OTG) Viewer REST API

OTG REST APIs are secured and require authentication

Render OTG files using a single API call

View OTG and hundreds of other formats from CAD, Word, PowerPoint, Excel, Email & eBook

Rotate, reorder & watermark OTG pages

View OTG as PDF

View OTG with its attachments

View OTG as HTML5

View OTG as Images like BMP, PNG, JPEG & TIFF

Get OTG document information like page & attachment count as well as properties

Flexible Rendering of OTG Documents

GroupDocs.Viewer is a powerful document viewer REST API that allows you to display over 186 document formats in your applications. It allows rendering of OTG for the whole document, page by page or custom range of pages.

Free Alternative to Desktop & Mobile OTG Viewer Apps

GroupDocs.Viewer Cloud app does not need any installation or setup to view OTG. You can quickly start using the Viewer App in your browser to view any number of files per day absolutely free of charge.

GroupDocs.Viewer Cloud REST API Explorer

The easiest way to try out GroupDocs.Conversion Cloud API right away in your browser is by using GroupDocs Cloud Web API explorer, which is a collection of Swagger documentation for the GroupDocs Cloud APIs.It allows you to effortlessly interact and try out every single operation our APIs exposes.

Minify OTG Output Content

One of the most exciting features of our Cloud-based viewer API for OTG is its ability to minify the output content. Minification removes comments, extra white-spaces, and other unneeded characters without breaking the content structure. As a result, the page becomes smaller in size and loads faster.

Page navigation

The APIs offer intuitive page navigation features that allow users to navigate through document pages easily and efficiently.

Show or hide document headers and footers

GroupDocs.Viewer Cloud APIs supports rendering of headers and footers.

Text selection

Users can select, copy, and paste text directly from documents, making it easy to extract and use information from the content.

Free Apps availability

Users can access and utilize FREE Apps for document viewing and annotation online, providing a convenient and cost-effective solution for accessing and interacting with document content.

Render OTG files to remote FTP or Cloud storage

Use third-party cloud storage to save your OTG rendered files.

  • Amazon S3
  • Azure Storage
  • Google Cloud Storage
  • Google Drive
  • Dropbox
  • Box
  • FTP

Self-host OTG Cloud Viewer Free App

The GroupDocs.Viewer Cloud Container Image enables users to self-host GroupDocs.Viewer Cloud for OTG using Docker.

Wide range of document format support

GroupDocs.Viewer Cloud APIs and FREE Apps support a variety of document formats including PDF, Microsoft Office (Word, Excel, PowerPoint), AutoCAD, image files (PNG, JPEG), and more.

Zooming functionality

The Viewer Cloud APIs provide zooming capabilities, allowing users to zoom in and out of document pages to view content in more detail or from a broader perspective.

Printing support

Users can print documents directly from the viewer, enabling them to easily generate physical copies of the document content if needed.

Extract document text while rendering in image mode

Our API allows extract text from documents

Programmatically get list of supported file types.

Use our REST API to get list of 186 supported document types.

Free Apps support show or hide document comments

API Allows to view and comments embedded inside supported documents types.

Online document viewing

Users can view documents online without the hassle of downloading them first, providing a convenient and efficient way to access and interact with document content.

Integration capabilities

Developers can easily integrate the Viewer Cloud APIs into their applications to enable users to view documents directly within the application interface without the need to download them.

Free online OTG viewer supports over 186 file formats

The cloud-based viewer API for OTG has the ability to display different document formats quickly, with just a few lines of code. Using the SDK for Android you can find out about the various document formats supported by the SDK.

Support and Learning Resources

Learning Resources

Product Support

Start Free Trial
Download GitHub Repository

View OTG using SDKs in other popular languages

View OTG Online via Node.js GroupDocs.Viewer
Cloud SDK for Node.js

View OTG Online via .NET GroupDocs.Viewer
Cloud SDK for .NET

View OTG Online via PHP GroupDocs.Viewer
Cloud SDK for PHP

View OTG Online via cURL GroupDocs.Viewer
Cloud for cURL

View OTG Online via Ruby GroupDocs.Viewer
Cloud SDK for Ruby

View OTG Online via Python GroupDocs.Viewer
Cloud SDK for Python

View OTG Online via Go GroupDocs.Viewer
Cloud SDK for Go

View OTG Online via Java GroupDocs.Viewer
Cloud SDK for Java

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