GroupDocs.Viewer for Node.js via Java - Code Examples

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GroupDocs.Viewer for Node.js via Java is a powerful document rendering API that helps you build high-performance document viewer applications in Node.js. Convert and preview popular file formats — including DOCX, XLSX, PPTX, PDF, CAD drawings, emails, archives, and many more — to HTML, PDF, PNG, and JPEG without installing Microsoft Office or other third-party software.

These ready-to-run code examples show how to integrate GroupDocs.Viewer into your Node.js projects quickly and explore the most common rendering scenarios.

Features

• Wide Format Support: Render Microsoft Office documents, PDFs, OpenDocument files, images, emails, archives, CAD drawings, and more.
• Flexible Output Formats: Generate HTML (embedded or external resources), PDF, PNG, and JPEG from a single API.
• Smart Format Detection: Automatically detect the input file type and apply the right rendering options.
• Rich Rendering Options: Control page size, resolution, watermarks, comments, notes, CAD layouts, Outlook folders, and other document-specific settings.
• Cross-Platform: Works on Windows, Linux, and macOS with Node.js and a Java runtime.

Supported File Formats

GroupDocs.Viewer for Node.js via Java supports a wide range of file formats, including Word, Excel, PowerPoint, PDF, OpenDocument, Image, Email, Visio, Project, EPUB, archives, CAD, and many others. See the full list of supported formats for details.

Get Started

1. Set Up Environment: Ensure that Node.js 20 LTS (or newer) and a compatible Java runtime are installed on your system.

2. Get the Code: Clone or download this repository.

   git clone git@github.com:groupdocs-viewer/GroupDocs.Viewer-for-Node.js-via-Java.git

3. Navigate to the Examples Folder

   cd ./GroupDocs.Viewer-for-Node.js-via-Java/Examples

4. Install Package: Run npm install to install @groupdocs/groupdocs.viewer and related dependencies. We typically keep the package aligned with the latest release. If you need a different version, update package.json accordingly.

   Alternatively, download the tgz package from the official GroupDocs Releases page, copy it into the Examples directory, and install it manually:

   npm install ./groupdocs.viewer-*.tgz

   Note for Windows / Visual Studio 2026: this project uses node-gyp@12+ (via overrides) to build the native Java bridge. If installation fails because files are locked, close the IDE and retry, or run npm run rebuild:java. If the Viewer JAR under node_modules/@groupdocs/groupdocs.viewer/lib is only a few hundred bytes (download failed), place groupdocs-viewer-nodejs-*.jar into that folder and run npm run postinstall.

5. Configure License (Optional): To unlock the full feature set without evaluation limitations, place your .lic file into the Examples/license folder. The examples apply it automatically. You can also get a temporary license to evaluate all features.

6. Run the Examples: To run the full set of examples, execute:

   npm start

   You can also run individual example scripts with Node.js. Rendered output files are saved to the Examples/output folder.

More Resources

Explore detailed guides, API references, and additional samples in the GroupDocs.Viewer for Node.js via Java documentation.

We also offer GroupDocs.Viewer for other platforms:

• GroupDocs.Viewer for .NET
• GroupDocs.Viewer for Java
• GroupDocs.Viewer for Python via .NET

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Product Page | Docs | Demos | API Reference | Blog | Search | Free Support | Temporary License