Clean CSV & Excel

Drop a spreadsheet

CSV · Excel · TSV · stays on your device

Convert an Excel workbook (.xlsx or .xls) to a plain CSV file, right in your browser. Drop the workbook in, optionally tidy it (trim spaces, drop blank rows, de-duplicate), then download the first sheet as CSV. The file is read on your device and never uploaded.

Useful when a system only accepts CSV, or you want a lightweight, universally-readable version of a spreadsheet.

How to convert excel to csv

  1. Drop your Excel (.xlsx) file.
  2. Leave "Save as CSV" selected (optionally tidy the data first).
  3. Download the CSV.

Frequently asked questions

Which sheet gets converted?

The first sheet of the workbook. Multi-sheet support (a sheet picker) is on the way.

Is my spreadsheet uploaded?

No. The .xlsx is parsed entirely in your browser.

Can I clean it at the same time?

Yes — the same cleanup options (trim, dedupe, drop blanks) are available before you export.

Related tools

Clean CSV CSV to JSON Edit CSV Columns