Seamless API Integration and FREE Apps for PDF Viewing via .NET

GroupDocs.Viewer Cloud APIs provide developers with a powerful platform to incorporate document viewing capabilities into their applications. With support for a wide range of document formats including PDF, PDF, Microsoft Office, AutoCAD, and more, developers can easily integrate the APIs to enable users to view documents directly within their applications without the need to download them. The APIs offer features such as page navigation, text selection, zooming, and printing, providing users with a seamless document viewing experience.

In addition to the APIs, GroupDocs also offers a range of FREE Apps that allow users to view and annotate documents online without the need for any installation. These apps support a variety of document formats and provide users with tools to highlight text. Users can also collaborate with others by sharing via email. With GroupDocs.Viewer Cloud APIs and FREE Apps, developers and users alike can easily access and interact with documents in a convenient and efficient manner.

GroupDocs.Viewer Cloud simplifies the process of document viewing and rendering of PDF files, enabling seamless integration of document viewing functionality into various applications or websites.


  • View PDF Online via Python or Free Online App
  • View PDF Online via PHP or Free Online App
  • View PDF Online via Node.js or Free Online App
  • View PDF Online via Ruby or Free Online App
  • View PDF Online via Java or Free Online App
  • View PDF Online via Android or Free Online App
  • View PDF Online via cURL or Free Online App

Seamless API Integration and FREE Apps for PDF Viewing via .NET

View PDF and other Popular Formats for Free

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How to view PDF file online

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

Frequently Asked Questions

Are there any limitations to the features available in GroupDocs.Viewer Cloud Free Apps?

GroupDocs.Viewer Cloud Free Apps may have restrictions on the number of document views, file types supported, or advanced functionalities compared to paid plans.

How can I access GroupDocs.Viewer Cloud Free Apps?

GroupDocs.Viewer Cloud Free Apps can be accessed directly from the GroupDocs website or through the GroupDocs web or mobile applications.

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.

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.

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.

Can I try PDF online viewer for free?

GroupDocs.Viewer Cloud App is completely free. You can view as many PDF and other files as you may like. If you are a developer and want to add this feature in your own app, you can try GroupDocs.Viewer Low-Code APIs without any limitations.

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 are the benefits of using GroupDocs.Viewer Cloud Free Apps?

GroupDocs.Viewer Cloud Free Apps provide a convenient way to explore and test the document viewing capabilities before subscribing to a paid plan.

I do not want to upload my confidential PDF files anywhere? What are my options?

GroupDocs.Viewer Cloud is also available as Docker image which can be used to self-host the service. Or you may build your own services using GroupDocs.Viewer High-code APIs which currently drive both PDF Free Viewer App and REST APIs.

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.

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.

Does GroupDocs provide technical support for issues related to GroupDocs.Viewer Cloud Free Apps?

GroupDocs offers technical support for Free Apps users to assist with any technical difficulties or inquiries related to the GroupDocs.Viewer Cloud platform.

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

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

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.

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.

How reliable is the performance of GroupDocs.Viewer Cloud Free Apps?

GroupDocs.Viewer Cloud Free Apps offer reliable performance and high-quality document viewing experience, ensuring smooth and seamless viewing of various file formats.

Can GroupDocs.Viewer Cloud Free Apps be used for commercial purposes?

GroupDocs.Viewer Cloud Free Apps are primarily for evaluation and testing purposes. For commercial use, consider upgrading to a paid subscription plan for full functionality and support.

Portable Document Format File (PDF) Viewer REST API

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

View PDF as HTML5

PDF REST APIs are secured and require authentication

View PDF as PDF

View PDF with its attachments

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

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

Rotate, reorder & watermark PDF pages

Page navigation

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

Free online PDF viewer supports over 186 file formats

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

Free Alternative to Desktop & Mobile PDF Viewer Apps

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

Text selection

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

Self-host PDF Cloud Viewer Free App

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

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.

Extract document text while rendering in image mode

Our API allows extract text from documents

Show or hide document headers and footers

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

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

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.

Render PDF files to remote FTP or Cloud storage

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

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

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.

Printing support

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

Free Apps support show or hide document comments

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

Minify PDF Output Content

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

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.

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.

Programmatically get list of supported file types.

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

Support and Learning Resources

View PDF using SDKs in other popular languages

  English