Convert to XLSX Online
Free online tool to convert CSV, TSV, ODS, XLS to XLSX. Batch convert spreadsheet and tabular data files to Excel XLSX format. No registration required. 100% client-side processing.
Spreadsheet to XLSX Converter
Drag & drop files
Support for 100+ formats • Images, Videos, Documents, Audio, Archives & more
Images Videos Audio Documents Archives
Convert Spreadsheets to XLSX Format
Our free online converter allows you to easily convert spreadsheet and tabular data files to XLSX, Microsoft Excel’s open XML format. XLSX is widely used for data analysis, reporting, and compatibility with modern spreadsheet software.
Supported Formats to XLSX
- CSV to XLSX
- TSV to XLSX
- ODS to XLSX
- XLS to XLSX
Why Convert to XLSX?
- Wide Compatibility - Supported by Microsoft Excel and other spreadsheet software
- Advanced Features - Supports complex formatting, formulas, and charts
- Data Integrity - Preserves data structure for analysis and reporting
- Modern Standard - Replaces older XLS format with better performance