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Spreadsheet & Table Conversions

CSV to Excel (XLSX) Converter

Turn a CSV into a proper Excel workbook (.xlsx) with clean columns — no more import wizards or mangled data. Open it directly in Excel or Google Sheets.

  • Free & unlimited
  • No signup
  • Files stay in your browser
CSV Input

How to convert CSV to Excel

  1. Paste your CSV, or upload a .csv file.
  2. Set the sheet name and delimiter if needed.
  3. Click Convert to build the workbook.
  4. Download the .xlsx and open it in Excel or Sheets.

About the CSV to Excel converter

This free online csv to excel (xlsx) converter lets you turn CSV into Excel in seconds, right inside your browser. There is nothing to install and no account to create — just paste or upload your CSV, and your Excel is generated instantly.

Unlike many online converters, QuickConvert never uploads your data to a server. Every conversion runs locally using JavaScript, so your files stay private on your own device. That makes it safe for sensitive, proprietary, or internal data that you would not want to send to a third party.

Why use QuickConvert?

  • Private by design — your CSV is processed in your browser and never leaves your computer.
  • Fast — conversions happen instantly as you type, with no waiting on a server round-trip.
  • Free & unlimited — no signup, no paywall, no file-size gimmicks.
  • Works everywhere — any modern browser on desktop, tablet or mobile.

Frequently Asked Questions

Why not just rename my CSV to .xlsx?

Renaming does not create a valid Excel file — Excel will warn you or mangle the data. This tool builds a genuine .xlsx workbook with real cells and columns.

Are numbers detected as numbers?

Yes. Numeric values are written as real numbers so you can sum, sort and chart them in Excel right away.

Is my data private?

Yes — the workbook is generated locally in your browser and never uploaded.

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