Conversion
Convert CSV XLSX
Free online CSV to Excel spreadsheet converter. Lossless quality, processed server-side, no signup required.
Convert CSV to XLSX now libreoffice Free tier Lossless ~1.0s per MB
How to convert CSV to XLSX
- 1
Open the converter
Click the button above — the workspace opens with CSV pre-selected as your source and XLSX as your target.
- 2
Drop your CSV
Drag and drop, or click to browse. Your file is uploaded over HTTPS and processed on our private servers — never shared with third parties.
- 3
Download the Excel spreadsheet
The result downloads automatically when conversion finishes. Powered by libreoffice — the same engine used by professional studios.