Why are my columns merged after conversion?

This happens when the wrong delimiter or encoding is used. Re-upload and select the correct delimiter (comma, semicolon, tab).

Will numeric columns remain numbers?

We preserve simple numeric types; complex locale-specific formats may need adjustment in Excel (decimal separator).

Can I convert CSVs with multiple tables?

Multiple tables are not automatically split—place each table into separate CSV files before converting or import the XLSX into Excel and split sheets manually.

Why are my columns merged after conversion?

This happens when the wrong delimiter or encoding is used. Re-upload and select the correct delimiter (comma, semicolon, tab).

Will numeric columns remain numbers?

We preserve simple numeric types; complex locale-specific formats may need adjustment in Excel (decimal separator).

Can I convert CSVs with multiple tables?

Multiple tables are not automatically split—place each table into separate CSV files before converting or import the XLSX into Excel and split sheets manually.

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CSV files are plain text — they work, but they're not great for formatting, formulas, or sharing with people who expect a real spreadsheet. This tool converts your CSV into a proper Excel (XLSX) file with clean columns and correct data types. Upload your CSV and download the Excel file in seconds.

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How it works

Upload CSV

Select the CSV file; choose delimiter and encoding if autodetect fails.

Preview & convert

Preview parsed rows and choose to treat the first row as headers.

Download XLSX

Download an Excel workbook with one sheet containing your data.

Frequently asked questions

About CSV to Excel

Convert CSV files to Excel (XLSX) while preserving delimiters, header rows, and basic data types. Useful when importing CSVs into spreadsheet apps that expect XLSX format.

Updated June 2026: Improved delimiter and encoding troubleshooting tips.

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