CSV to Excel Converter

Upload a .csv file and download a formatted .xlsx spreadsheet.

Click to upload a .csv file

or drag & drop here

About the CSV to Excel Converter

This tool converts CSV to Excel, writing a real XLSX workbook with typed cells and separated columns. It avoids the usual double-click problem where Excel guesses the delimiter wrongly and drops every row into column A.

Convert CSV to Excel rather than double-clicking the file, because Excel guesses. Depending on locale it may treat semicolons as the separator, split on the wrong character, mangle dates, or strip the leading zeros off postcodes and product codes. Converting first produces a workbook where the columns are already correct.

The output is a genuine XLSX file, so cells carry types instead of being text that looks like numbers. Sorting, filtering, formulas and pivot tables work immediately, without a Text to Columns pass.

Useful whenever a system exports CSV and a person has to work with it: bank downloads, analytics exports, CRM reports and anything else that arrives as raw comma-separated text.

How to use the CSV to Excel Converter

  1. Upload your CSV. Drag the .csv file onto the drop zone or paste the data.
  2. Check the detected columns. Confirm the delimiter was read correctly and the columns line up.
  3. Convert to XLSX. Run the conversion to build a formatted Excel workbook.
  4. Download the workbook. Save the .xlsx file and open it in Excel, Sheets or Numbers.

CSV to Excel Converter features

  • XLSX format support
  • Data type detection
  • Formatting preservation
  • Large file support
  • Multiple sheets
  • Column auto-width

Frequently asked questions

Why not just open the CSV in Excel?

Excel guesses the delimiter and can drop every row into column A, mangle dates or strip leading zeros. Converting first avoids that.

Is the output a real XLSX file?

Yes. It is a genuine Excel workbook with typed cells, so sorting, filtering and formulas work immediately.

Are leading zeros preserved?

Yes. Codes and postcodes keep their leading zeros instead of being read as numbers.

What if my CSV uses semicolons?

Semicolon and tab separated files are detected and handled as well as commas.

Can I convert several CSVs into one workbook?

Each conversion produces one workbook from one CSV. Combine the sheets in Excel afterwards if you need them together.