Convert XLSX to SXC Online — Free
Fast, free XLSX to SXC converter. No registration required.
2M+ Files Converted
Trusted by thousands of users
Secure Transfer
HTTPS encrypted uploads
Privacy First
Files auto-deleted after processing
No Registration
Start converting instantly
Works Everywhere
Any browser, any device
How to Convert
Upload your .xlsx file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .sxc file when it's ready.
What is XLSX?
XLSX is the modern Microsoft Excel format. It's the standard for spreadsheets containing data, formulas, charts, and pivot tables.
Format Details
- Full Name
- Microsoft Excel Spreadsheet
- Extension
- .xlsx
Key Features
- Spreadsheet
- Formulas
- Charts
- Data analysis
What is SXC?
SXC is the legacy spreadsheet format from StarOffice and early OpenOffice.org (pre-2.0). It stores spreadsheet data as XML inside a ZIP archive and was the predecessor to the ODF/ODS standard.
Format Details
- Full Name
- StarOffice Calc Spreadsheet
- Extension
- .sxc
Key Features
- Legacy StarOffice
- XML-based
- ZIP archive
- Predecessor to ODS
XLSX vs SXC
| Feature | XLSX | SXC |
|---|---|---|
| Full Name | Microsoft Excel Spreadsheet | StarOffice Calc Spreadsheet |
| Extension | .xlsx | .sxc |
| Best For | Spreadsheet | Legacy StarOffice |