Convert CSV to XLSX on Mac
Convert CSV files to XLSX format on your Mac with Jollycat. Simple tabular data format. Universal for data exchange between spreadsheets, databases, and applications. All processing runs locally on your Mac — no cloud processing and no uploads required for conversion.
CSV vs XLSX
| Property | CSV | XLSX |
|---|---|---|
| Type | document | document |
| Compression | Plain text | ZIP-compressed XML |
| File Extension | .csv | .xlsx |
| Key Advantage | Universal data format | Industry standard spreadsheet |
How to Convert CSV to XLSX on Mac
Open your CSV file
Drag and drop your .csv file onto the Jollycat icon in your macOS dock or menu bar. Jollycat instantly detects the format.
Choose XLSX output
Select XLSX from the available output formats. Configure any format-specific options.
Convert and save
Click Convert and Jollycat processes the file instantly on your Mac. No uploads required, no waiting — everything runs locally on Apple Silicon.
When to Convert CSV to XLSX
XLSX advantages
Industry standard spreadsheet. Formula support.
CSV limitations
No formatting. No formulas.
Common use cases
Financial data, Data analysis, Business reports.
CSV to XLSX Conversion Tips
XLSX stores spreadsheet data as ZIP-compressed XML following Office Open XML standard.
Frequently Asked Questions
Is the CSV to XLSX conversion free?
Jollycat is a one-time purchase for $9.99. Once purchased, you can convert CSV to XLSX and use all 1,650+ conversion paths with no limits.
Does converting CSV to XLSX require an internet connection?
No. Jollycat processes everything locally on your Mac. Your CSV files never leave your device — all conversion happens offline using Apple Silicon.
Can I batch convert multiple CSV files to XLSX?
Yes. Drag multiple CSV files onto Jollycat and convert them all to XLSX at once. Batch processing is built in.
Ready to Convert CSV to XLSX?
Jollycat handles CSV to XLSX conversion and 1,650+ other format conversions. All offline on your Mac.
Get Jollycat for Mac