Decant

Convert CSV to XLSX

Convert CSV files to XLSX in your browser.

Drop files here

or paste them in. Whole folders work too.

  • Nothing is uploaded
  • Works offline
  • Free and open source

How to convert CSV to XLSX

  1. Choose your CSV files, or drop them anywhere on this page.

  2. Check that XLSX is selected, and change the settings if you need to.

  3. Select Convert, then save your XLSX files.

About CSV and XLSX

CSV

CSV stores a table as plain text, one row per line with commas between values. Every spreadsheet and database can open it.

XLSX

XLSX is Microsoft Excel’s workbook format, with multiple sheets, formatting and formulas.

Questions

How do I convert CSV to XLSX?
Choose your CSV files or drop them on this page, check that XLSX is selected, then select Convert and save the result. It works the same on a phone or a computer.
Is it safe to convert CSV to XLSX here?
Yes. The conversion runs in your browser, so your CSV files are never uploaded, stored or logged.
Can I convert several CSV files at once?
Yes. Add as many as you like and they convert together. Save each result on its own, or all of them as one ZIP.

More CSV conversions