Convertur

Convert CSV to Excel (XLSX)

Convert CSV into a real .xlsx Excel workbook — built locally in your browser with SheetJS, nothing uploaded.

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Why convert CSV to XLSX?

A native .xlsx workbook preserves cell types, opens without an import wizard, and can hold formatting, formulas, and multiple sheets that plain CSV can't.

How the conversion works

Convertur parses the CSV and writes a single-sheet .xlsx workbook using the SheetJS engine, entirely in your browser.

Quality & compatibility notes

The output opens in Excel, Google Sheets, LibreOffice, and Numbers. Values are written as text so long numbers and leading zeros survive intact.

How to csv to xlsx

  1. Drop a .csv file into the zone above, or paste CSV into the text tab.
  2. Press Convert to build the workbook locally.
  3. Download the .xlsx file, ready to open in Excel.

Related converters

XLSX to CSVExtract the first sheet of a workbook as CSV.CSV to JSONTurn spreadsheet rows into a clean JSON array.JSON to CSVTurn JSON data into a spreadsheet-ready CSV.XLSX to JSONTurn a spreadsheet into a JSON array of rows.

CSV to XLSX — FAQ