Just Open It

CSV to Excel converter

Turn CSV exports into proper Excel workbooks in one click.

Drop .csv files here, or choose files

Add as many files as you like

Choose files

Converted on your device — files are never uploaded

Why convert

Why convert CSV to XLSX?

Opening a CSV directly in Excel can mangle dates, leading zeros and special characters. An XLSX file opens cleanly in Excel, Google Sheets and Numbers.

  • Nothing is uploaded — 100% private
  • Batch convert many files at once
  • Free, no sign-up, no watermark

How to

How to convert CSV to XLSX

  1. 1Add your filesDrop your .csv files on the page or click “Choose files”. You can add many at once.
  2. 2It converts instantlyEach file is converted by your browser, on your device. Nothing is uploaded.
  3. 3DownloadSave files one by one, or everything together as a ZIP.

Frequently asked questions

Everything happens in your browser, so most answers come down to: it's private, free and instant.

Are my files uploaded?

No. The conversion runs inside your browser, on your device. Your files are never sent to a server, so it's safe for private photos and documents.

Is it free? Are there limits?

It's completely free, with no sign-up and no watermark. Convert as many files as you like — the only limit is your device's memory.

More free tools

Excel to CSV converterExport every sheet of an Excel file as a clean CSV.JSON to CSV converterTurn a JSON array of objects into a spreadsheet-ready CSV.CSV to JSON converterTurn a CSV into a JSON array, with the header row as keys.HEIC to JPG converterTurn iPhone photos into JPGs that open everywhere — many at once, right in your browser.HEIC to PNG converterConvert iPhone HEIC photos to lossless PNG — no quality loss, no upload.WEBP to JPG converterSave web images as JPG files that every app, printer and form accepts.