PST Viewer for Android - Open Outlook PST Files via API

Outlook stores email messages, contacts, calendars and tasks in a PST file, the Personal Information Store that keeps a mailbox outside the mail server. Support desks, migration projects and compliance teams exchange these archives constantly, and a PST from a busy mailbox can reach several gigabytes.

Opening one normally requires Outlook on a Windows desktop. GroupDocs.Viewer Cloud removes that requirement for Android developers: the REST API loads the PST in the cloud and returns its content as HTML, PDF, JPG or PNG, ready to show in any Android view. Password-protected archives are supported, and selected pages can be requested instead of the whole store.

Integration runs through the Java SDK, which a Gradle or Maven build pulls in like any other library; it carries the authentication work and a set of worked samples. Thumbnails, zoom and page navigation belong to the same endpoint, and the interactive API Explorer lets you try each one before writing code.

Colleagues who only need an occasional look at an archive have the free online GroupDocs.Viewer app instead, which handles PST among more than 180 formats. A free trial covers development.


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

PST Viewer for Android - Open Outlook PST Files via API

View PST and other Popular Formats for Free

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How to view PST file online

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

Frequently Asked Questions

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.

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

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

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.

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.

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 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.

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.

Which build systems can pull the viewer SDK into an Android project?

Gradle and Maven both publish the GroupDocs.Viewer Cloud SDK for Java, so one line in your build file is enough. From there the calls are ordinary Java: send a file to storage, request a view, and read back HTML, PDF, JPG or PNG for the pages you asked for.

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.

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.

Can GroupDocs.Viewer Cloud open large or password-protected PST archives?

Yes. The API accepts password-protected PST files when you supply the password with the request, and long archives can be rendered page by page, so your app shows the required part without loading the whole store.

Outlook Personal Information Store File (PST) Viewer REST API

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

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

View PST with its attachments

View PST as PDF

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

PST REST APIs are secured and require authentication

View PST as HTML5

Render PST files using a single API call

Rotate, reorder & watermark PST pages

Free Alternative to Desktop & Mobile PST Viewer Apps

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

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.

Render PST files to remote FTP or Cloud storage

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

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

Show or hide document headers and footers

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

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.

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.

Extract document text while rendering in image mode

Our API allows extract text from documents

Free Apps support show or hide document comments

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

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.

Page navigation

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

Programmatically get list of supported file types.

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

Flexible Rendering of PST 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 PST for the whole document, page by page or custom range of pages.

Text selection

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

Minify PST Output Content

One of the most exciting features of our Cloud-based viewer API for PST 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.

Printing support

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

Self-host PST Cloud Viewer Free App

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

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.

Free online PST viewer supports over 186 file formats

The cloud-based viewer API for PST 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

View PST using SDKs in other popular languages

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