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Simplifying spreadsheets, one file at a time.

CSV → XLSX

Convert a CSV into a single-sheet XLSX with configurable delimiter and sheet name.

Drop or select a CSV file to convert to XLSXMax 20 MB per file

How it works

Upload your CSV file using the file picker or drag-and-drop.
Set the delimiter (comma, semicolon, tab, or custom) and output sheet name.
Click Convert to download your new XLSX workbook.

Why use this tool

Turn plain CSV data into a proper Excel workbook for formatting, formulas, charts, and sharing with colleagues who prefer XLSX.

FAQ

What delimiters are supported?

Comma, semicolon, tab, and custom single-character delimiters.

Will my data types be preserved?

Yes. Numbers, dates, and text are detected and stored with appropriate Excel types.

Is there a row limit?

The tool handles files up to 20 MB, which typically covers hundreds of thousands of rows.