Convert XLSX to CSV
Drop an Excel .xlsx (or legacy .xls) and get plain CSV — values only, with formulas exported as their results and formatting dropped. Multi-sheet workbooks become one CSV per sheet, bundled in a ZIP. The whole conversion runs in your browser, so your file never leaves your device.
About converting XLSX to CSV
An Excel .xlsxis a zip of XML describing your workbook’s sheets, cells, and styles. This tool reads each sheet’s cells and writes them out as comma-separated values: one CSV row per spreadsheet row, one file per sheet. A single-sheet workbook downloads as one .csv; a multi-sheet workbook downloads as a ZIP with one .csv per sheet.
What carries over is the data, not the presentation. Formulas are exported as their last-calculated values, and colours, fonts, merged cells, column widths, and charts are dropped — CSV simply has nowhere to put them. The result is a plain, portable table any tool can read.
Is it private?
Yes. The converter is JavaScript running on your own machine. It reads the spreadsheet and builds the CSV entirely in your browser. Nothing is uploaded, stored, or seen by us; there is no server to send files to.
Frequently asked questions
- What happens to formulas and formatting?
- CSV is a values-only format. Formulas are exported as their last-calculated values, and formatting — colours, fonts, merged cells, column widths, charts — is dropped. You get the data in each cell, nothing more.
- My workbook has several sheets — what do I get?
- A workbook with one sheet downloads as a single .csv file. A workbook with several sheets downloads as a ZIP containing one .csv per sheet, named after the sheet names.
- Does it work with older .xls files?
- Yes. Both the modern .xlsx format and the legacy .xls format are read by the same on-device parser.
- Are my files uploaded to a server?
- No. The converter is JavaScript running on your own machine: it reads the spreadsheet and builds the CSV entirely in your browser. The file is never uploaded, stored, or seen by us — there is no server to send it to.
- Is it free, and do I need an account?
- Yes, it is free with no watermarks, no daily caps, and no sign-up. Drop your spreadsheet, convert it, and download the CSV.