Drop your XLSX files here
or click to select multiple files from your device
Maximum file size: 100 MBWhy Convert XLSX Files?
The XLSX format is the modern standard for Microsoft Excel spreadsheets. It's widely used for handling data, financial models, reports, and analytics. XLSX files are flexible, support large datasets, and work seamlessly with most modern spreadsheet software.
Still, there are times when converting XLSX files makes sense. For example, converting to CSV makes it easier to import structured data into databases, apps, or programming workflows. Exporting to PDF creates a read-only version of reports that can be securely shared without risking edits. In some cases, converting to older formats like XLS is necessary for compatibility with legacy systems.
Free Online XLSX Converter
Convert your XLSX files to XLS, CSV, ODS, TSV, and over 4 other formats instantly. Our free XLSX converter works in your browser for complete privacy — no registration required.
- Convert multiple XLSX files at once (batch processing)
- Maintain original quality with smart compression
- 100% secure — files never leave your device
- Support for 4+ output formats
- Instant download — no waiting
- Works on all devices and browsers
Supported XLSX Conversions
You can convert XLSX to:
Frequently Asked Questions
How do I convert XLSX online?
Upload your XLSX files, select XLS, CSV, ODS or any other format from the dropdown menu, and click convert. Your files will be ready for download instantly.
Can I convert multiple XLSX files at once?
Yes! Upload multiple XLSX files and they'll all be converted simultaneously. Large batches are automatically packaged as a ZIP file for download.
Is the XLSX converter free to use?
Absolutely — our XLSX converter is 100% free. No registration or payment required.
Is XLSX conversion secure?
Yes, all XLSX conversions are processed securely in your browser. Your files are never uploaded to our servers and remain completely private on your device.