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Convert CSV to XLSX
Convert CSV to XLSX format — 100% browser-based, no upload required.
2 cores · low tier
Drop a file here or click to select
Format will be auto-detected
About these formats
Source
CSV
Comma-Separated ValuesTabular data format with comma-separated values. Universal format for data exchange between applications.
Best for
Data exchangeDatabase export/importSpreadsheet dataBulk data
Advantages
- + Universal support
- + Simple format
- + Human readable
- + Tiny file size
Limitations
- − No formatting
- − No data types
- − Delimiter conflicts
Target
XLSX
Microsoft Excel SpreadsheetStandard spreadsheet format with formulas, charts, pivot tables, and data analysis. Used across business and science.
Best for
Data analysisFinancial reportsBusiness dataCharts & formulas
Advantages
- + Formulas & functions
- + Charts
- + Data analysis
- + Wide support
Limitations
- − Requires Office software
- − Slow with large data
- − Complex format