webtech360-dashboard.xlsx
See how Excel (XLSX/XLS) works with this ready-made sample. Open it in the viewer or download the original XLSX file for your own testing.
Open Excel (XLSX/XLS) files online
Excel workbooks store tabular data across multiple sheets with formulas and formatting. The viewer renders each sheet as a scrollable table.
Interactive viewer — This format is parsed and rendered in the browser.
Drop a XLSX file to open it
or click to choose — everything stays on your device
Choose file🔒 100% private — files never leave your browser
Sample files for Excel (XLSX/XLS)
Choose an extension below to open a ready-made sample in the viewer or download it for your own testing.
webtech360-xls-sample.xls
See how Excel (XLSX/XLS) works with this ready-made sample. Open it in the viewer or download the original XLS file for your own testing.
Or turn XLSX into an image — snapshot the preview, add arrows or notes, and download a PNG.
What is a XLSX file?
Excel workbooks store tabular data across multiple sheets with formulas and formatting. The viewer renders each sheet as a scrollable table. The .XLSX extension identifies a Office Open XML Spreadsheet file, which is served with the application/vnd.openxmlformats-officedocument.spreadsheetml.sheet media type. You can open it here instantly — drop the file into the box above and it renders in your browser. Nothing is uploaded.
Besides this free online viewer, you can open Excel (XLSX/XLS) files in desktop apps such as Microsoft Excel, Google Sheets, LibreOffice Calc — but here all you need is a web browser.
Quick facts
| Format | Excel (XLSX/XLS) — Office Open XML Spreadsheet |
|---|---|
| File extensions | .xlsx .xls |
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| Developer | Microsoft |
| Category | Office documents |
| Also opens in | Microsoft Excel, Google Sheets, LibreOffice Calc |
How to open a XLSX file online
- Click Choose file above, or drag your XLSX file onto the box.
- The right viewer loads automatically and renders your file.
- Read, scroll or page through it. To open a different file, choose Open another file.
100% private — files never leave your browser.
Libraries used to render XLSX in the browser
This viewer is built entirely with open-source JavaScript that runs in your browser:
Frequently asked questions
What is a .XLSX file?
A .XLSX file is a Office Open XML Spreadsheet, identified by the application/vnd.openxmlformats-officedocument.spreadsheetml.sheet media type. You can open and read it instantly in the viewer above without installing anything.
What programs open XLSX files?
On the desktop, XLSX files typically open in Microsoft Excel, Google Sheets, LibreOffice Calc. Online, this page opens them in any modern browser — nothing to download.
How do I convert XLSX to an image?
Use Snapshot to capture the XLSX preview, optionally add arrows, text or highlights, then download it as a PNG image.
Is it safe to open my XLSX file here?
Yes. The file is read and rendered entirely by JavaScript inside your own browser. It is never uploaded to a server, so nothing leaves your device.
Do I need to install anything to view a XLSX file?
No. There is nothing to install and no account to create. Open the page, drop your file, and it displays instantly.
Does it work on my phone or iPad?
Yes. The viewer is fully responsive and works in modern mobile and tablet browsers such as Safari and Chrome.
Is there a file size limit?
There is no hard limit, but very large files depend on your device’s memory. Big files are processed in the background so the page stays responsive.