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Jul 11 2022

How to View XLSX Documents in a React Web App

by Andrey Safonov

Looking for a React XLSX viewer? This blog reveals how to view Microsoft Office documents in a React file viewer using

. This includes Microsoft Word, Excel, and PowerPoint formats and legacy formats like DOC, XLS, and PPT.

In a few lines of code, we'll show how you can view files client-side, with no server dependencies and without Microsoft Office licenses or third-party software. PDFTron’s WebViewer directly converts `DOCX`, `XLSX`, and `PPTX` files using JavaScript and renders them for viewing dynamically.

Try our

to test WebViewer with your files.

Check out the full React doc viewer demo on our

page. And visit the documentation for the
get-started steps
and information on additional functionality.

Additional Functionality

WebViewer supports more than simply viewing Office documents, offering

mail merge
on XLSX templates,
text editing
page manipulation
form filling and creation
, and much more.

WebViewer also supports formats like PDF, images,

, and

How to View XLSX in a React Viewer

Step 1 - Get Started

Once the React doc viewer example is up and running,

the URL, blob, file path, or arrayBuffer to `initialDoc` property in WebViewer constructor.

Code Example for React Document Viewer

  initialDoc: '',
}, document.getElementById('viewer'));

You can also call `loadDocument` with the same parameters.

  .then(instance => {
    instance.UI.loadDocument('', { filename: 'myfile.xlsx' });

Step 2 - Run the App

You can now run the app via 'npm start'.

To view the npm React file viewer xlsx app, navigate to http://localhost:3000/. The app automatically reloads if you change any of the source files.

A Customizable UI

If you want to configure the UI, WebViewer comes with a rich set of APIs. To get an idea of the vast array of possibilities, check out the

. You can also
create your own UI
by referencing our open-source
UI code


Adding Office document viewing and collaboration to your native npm React file browser app is straightforward with PDFTron’s WebViewer, a

. Find the source code for this blog post on our

You can also check out other capabilities on our

If you have any questions about PDFTron’s SDK or WebViewer, please


Related articles


How to View XLSX in a Vue Web App

This blog post describes how to open XLSX documents in a Vue web app and much more with PDFTron WebViewer.


How to View XLSX in an Angular Web App

This article describes how to open XLSX documents in an Angular web app and so much more with PDFTron WebViewer.


How to View PPTX Documents in a Vue Web App

A description of how to open PPTX documents in a Vue web app and so much more with PDFTron WebViewer.


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First a developer then a solution engineer. Now a product team leader and dev experience advocate.

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