Free Online XLSX Viewer
Open any .xlsx
file right in your browser. No upload, no install, no signup —
your files never leave your device.
Drag & drop an .xlsx file above, or click Open File to start.
Private by design
Files are read locally in your browser. Nothing is uploaded to a server — ever.
Instant, no install
No Microsoft Excel, no download, no plugin. The spreadsheet renders the moment you open it.
Free, no signup
No account, no email, no watermark. Open as many files as you want.
Any device
Works in any modern browser on Windows, macOS, Linux, ChromeOS — even tablets.
How to view an XLSX file online
- 1
Click Open File above, or drag your
.xlsxfile onto the page. - 2
Your spreadsheet renders instantly — cell styles, merged cells, borders, and number formats are preserved.
- 3
Scroll, switch sheets, and inspect any cell. Your file stays on your device the whole time.
🔒 Why your files stay private
Most "online Excel viewers" upload your file to a server to render it — which is risky for confidential spreadsheets. This viewer is different: it reads the file directly in your browser using the File API and renders it on an HTML canvas. Your data never travels over the network, so it is safe even for sensitive financial, HR, or business documents.
Want to build your own XLSX viewer or editor?
This tool is powered by ReoGrid — a fast, Excel-like spreadsheet component for the web. Drop it into your React, Vue, or vanilla JS app to view and edit .xlsx files, with formulas, cell styles, and number formats. It takes only a few lines of code.
Frequently asked questions
Is this online XLSX viewer really free? ▾
Yes. Viewing Excel files here is completely free — no account, no email, and no limit on how many files you open.
Are my files uploaded to a server? ▾
No. The viewer reads your file locally using the browser File API. Your spreadsheet never leaves your device, which makes it safe for confidential or sensitive data.
Do I need Microsoft Excel installed? ▾
No. The viewer runs entirely in your web browser. You do not need Excel, Office, or any other software installed.
What file formats are supported? ▾
The viewer opens .xlsx files (Excel 2007 and later). Cell values, styles, merged cells, borders, and number formats are rendered.
Can I edit the file, not just view it? ▾
This page is a viewer. If you want to build an editable spreadsheet or XLSX viewer in your own web app, it is powered by ReoGrid — a JavaScript spreadsheet component for React, Vue, and vanilla JS.
Does it work offline? ▾
Once the page has loaded, opening and rendering your file runs entirely in the browser, so it works even without an active internet connection.