Online Excel Viewer
The lightweight way to read .xlsx and .xls files. Privacy-first, lightning-fast, and zero data leaves your device.
Click or Drag Excel file here
Enterprise-Grade Privacy
Read Excel files without
Microsoft Office 365
Whether you're on a Chromebook, a tablet, or a restricted work computer, our XLSX viewer provides instant access to your data. We built this for speed and security—perfect for peeking into spreadsheets without the bloat.
Multi-Sheet Tabs
Automatically detects and displays all sheets (tabs) within your workbook for easy navigation.
Power Search
Filter through millions of data points instantly with our optimized in-memory search engine.
Zero-Server Leak
Your file is never uploaded. We utilize Client-Side JavaScript to render the grid directly in your tab.
Legacy Support
Full compatibility with modern .xlsx (XML) and legacy .xls (Binary) files from older versions of Excel.
Need More Power?
Our Excel Viewer is part of a complete data suite designed to help you manage spreadsheets without Microsoft Excel.
XLSX Viewer FAQ
Can I view Excel spreadsheets with passwords?
For security reasons, password-protected files cannot be opened in the browser without the correct decryption key. We recommend removing the password before viewing if you wish to use this tool.
Does this viewer support Excel formulas?
Our viewer displays the calculated results of your formulas as they were last saved in the file. To live-edit formulas, please visit our XLSX Editor.
How many rows can I view?
We use a "Virtualized Grid" which allows you to scroll through 100,000+ rows instantly. The only limit is your device's available RAM.
The Secure Alternative to Google Sheets & Office 365
While cloud-based spreadsheet tools are powerful, they require you to grant third-party servers access to your data. Our Online XLSX Viewer is built on a "Privacy by Design" philosophy. By using client-side parsing technology, we ensure that your financial reports, client lists, and internal data stay on your machine.
/ For Developers
Need to quickly verify the structure of an XLSX export? Our viewer supports raw data inspection, allowing you to see hidden columns and multi-sheet workbooks without waiting for heavy software to boot up. It’s the perfect lightweight tool for debugging spreadsheet logic.
/ For Data Analysts
Manage large datasets with ease. Our interface uses a high-performance virtualized scrolling engine, meaning you can scroll through hundreds of thousands of rows without the browser freezing or crashing—a common issue with other online readers.
Supported Microsoft Excel Extensions
*Note: Macro-enabled files (.xlsm) can be viewed, but macros will not be executed for security reasons.