The only way you can open them in Excel Online is to store them on OneDrive, SharePoint or Teams. Answer from tirlibibi17 on reddit.com
Canva
canva.com › home › sheets › xlsx viewer
Free XLSX viewer: Open and view XLSX files online | Canva
An XLSX viewer is an application or tool used to open and view Microsoft Excel spreadsheets that have the .xlsx extension. It lets you see the data in the Excel file without having to download the full program on your device.
GroupDocs
products.groupdocs.app › groupdocs products › viewer apps › view xlsx
View XLSX online | Free GroupDocs Apps
April 18, 2022 - Free online XLSX viewer. Open and view XLSX files online for free.
Is it safe to view XLSX files using free GroupDocs Viewer?
Of course! The preview files will be available instantly after the file uploaded. We will delete the uploaded file after 24 hours.
products.groupdocs.app
products.groupdocs.app › groupdocs products › viewer apps › view xlsx
View XLSX online | Free GroupDocs Apps
How can I open and view XLSX file?
First, you need to upload a file: drag & drop your XLSX file or click inside the white area to choose a file. Then you will be redirected to the viewer application.
products.groupdocs.app
products.groupdocs.app › groupdocs products › viewer apps › view xlsx
View XLSX online | Free GroupDocs Apps
What browser should I use to view XLSX files?
You can use any modern browser to view XLSX files, for example, Google Chrome, Microsoft Edge, Firefox, Opera, or Safari.
products.groupdocs.app
products.groupdocs.app › groupdocs products › viewer apps › view xlsx
View XLSX online | Free GroupDocs Apps
Videos
01:06
How to Open XLSX file || XLSX Filer viewer - YouTube
02:15
How to View XLSX File on Windows | Open and View XLSX File - YouTube
How To Open XLSX Files On Mac / Windows 10? - YouTube
00:59
How to open and view XLSX files in a browser | GroupDocs.Viewer ...
06:53
Using GcDataViewer to View Data Documents (xlsx, csv, json) in ...
How to view and edit spreadsheet files such xlsx and csv in VSCode ...
Microsoft Store
apps.microsoft.com › detail › 9pcwzvp4gdqs
Open Xlsx PLUS - Free download and install on Windows | Microsoft Store
With Open Xlsx PLUS, you can not only create and edit Excel Spreadsheet documents (.xlsx and .xls) directly, but also open many more common spreadsheet document formats (.ods, .wks and etc.). Support formats: .ods, .ots, .oxc, .stc, .fods, .xml, ...
Online Document Viewer
onlinedocumentviewer.com › en › excel-viewer
Free Online Excel Viewer
You can navigate between document pages, zoom in and out, and explore your Microsoft XLSX or XLS documents with our Online Excel Opener. Whether you need to view, read, or share Excel documents, our online document viewer provides all the ...
Softonic
xlsx-viewer.en.softonic.com › home › windows › productivity › document management › free xlsx viewer
Free XLSX Viewer - Download
June 18, 2025 - Free XLSX Viewer can open multiple reports simultaneously in tabs, a significant pro, and offers efficient file recovery, saving you effort. It supports a wide range of formats and displays all Excel components, from charts to formulas.
FileHelper
filehelper.com › formats › xlsx
Easily Open .XLSX Files Online with FileHelper.com
Open and view .XLSX files with File Helper.com, a free online file viewing utility.
Reddit
reddit.com › r/excel › how to open .xlsx file directly with excel web, on pc that doesn't have excel installed?
r/excel on Reddit: How to open .xlsx file directly with Excel WEB, on PC that doesn't have Excel installed?
August 3, 2025 -
So company upgraded to Window 10 Server, and we don't have Office installed anymore. We are forced to WEB apps now.
I have bunch of Excel files on Desktop and I don't want them accessed only through OneDrive folder.
Is there a way to somehow link .xlsx extension to Excel WEB? As well as Word extension.
Jumpshare
jumpshare.com › viewer › xlsx
XLSX Viewer - Open XLSX File Online for Free | Jumpshare
Our free online XLSX file viewer lets you view your files in any modern desktop or mobile web browser, and it's completely free!
Google Play
play.google.com › store › apps › details
XLSX Viewer: XLS Reader - Apps on Google Play
XLSX Viewer: XLS Reader & Spreadsheets Editor app with XLSX file reader can be your default All-in-1 XLS App and directly open the XLS / CSV / XLSX / XLSM / Sheets from the file manager, email container, or web in this XLS sheet reader without ...
Google Workspace
workspace.google.com › marketplace › app › xls_viewer_editor › 889441654476
XLS Viewer, Editor - Google Workspace Marketplace
Lets you view and edit XLS files without leaving your browser. The supported file formats are spreadsheets, xls, xlsx, csv, sxc. ... This viewer lets you view and edit XLS files without leaving your browser.
Microsoft Excel
excel.cloud.microsoft › en-us
Edit spreadsheets online for free | Microsoft Excel for the Web
Create and edit spreadsheets online with Microsoft Excel for the web. Easy formatting, analysis, and real-time collaboration from any device.
Google Play
play.google.com › store › apps › details
Xls file viewer xlsx file read - Apps on Google Play
September 15, 2025 - The xlsx viewer display supported formats of files in one place including a file tool to open the sheets or spreadsheets including slides in the xls file reader. You can open any file from memory either phone or SD card even you can download ...
Softonic
xlsx-viewer.en.softonic.com › home › windows › productivity › document management › free xlsx viewer › download
Download Free XLSX Viewer - Free - latest version
June 18, 2025 - Download Free XLSX Viewer for Windows now from Softonic: 100% safe and virus free. More than 1478 downloads this month. Download Free XLSX Viewer lat
Aspose
products.aspose.app › excel apps › viewer › xlsx
View XLSX Files Free Online
View XLSX files online with our free and easy-to-use XLSX viewer. Collaborate in real-time and access your spreadsheets from anywhere.
Visual Studio Marketplace
marketplace.visualstudio.com › items
XLSX, CSV, TSV & Markdown Editor - Visual Studio Marketplace
June 4, 2026 - Extension for Visual Studio Code - View and edit xlsx files with colors, fonts and styles (supporting in-table editing), and view and edit CSV, TSV & Markdown files in VS Code. This is an open-source project.
Flipper File
flipperfile.com › home › text tools – free online converters (txt, csv, json) › online xlsx/xls viewer – fast, secure, free excel viewer
Online XLSX/XLS Viewer – Fast, Secure, Free Excel Viewer - Flipper File
December 9, 2025 - A simple, fast, and secure online XLS/XLSX viewer. Open Excel files directly in your browser with sheet navigation, filtering, and CSV export. No uploads—your data never leaves your device.
WPS Office
wps.com › feature › xlsx-viewer
All-in-One Free XLSX Viewer – Open, Read & Edit XLSX Files
Enjoy a reliable XLSX reader that's free to download and easy to use. With our XLSX file viewer, you can view, edit, and save .xlsx documents across desktop, mobile, and online platforms anytime.
SysTools
systoolsgroup.com › xlsx › viewer
Free XLSX Viewer Tool – Open, View, Read Excel .xlsx Spreadsheets
SysTools XLSX Viewer Tool, which is a free free XLSX reader tool for opening and reading Excel file, allows its users to view Excel Files in different viewing modes. Using any of the modes, users can check out their files with all of its original ...
Google Play
play.google.com › store › apps › details
Xlsx File Reader & Xls Viewer - Apps on Google Play
Xlsx Reader: Xls Viewer can access data charts, perform analysis, and manage key Excel file details. The Xls File Viewer: Xlsx App simplifies file handling to a single tap so you focus on your projects instead of fiddling with devices.
Adobe
adobe.com › acrobat › resources › document-files › xlsx.html
XLSX file: How to open, view, or edit | Adobe Acrobat
Master XLSX files with ease. Learn how to create, open, and edit them using Excel or Google Sheets, and streamline workflows with Adobe Acrobat tools.