CSV to Excel
Turn comma-separated values into an Excel .xlsx workbook. Paste CSV text or upload a .csv file, then download a spreadsheet with one field per cell.
The download is one worksheet named Sheet1. .xlsx is the Office Open XML workbook defined by ECMA-376. Excel, Google Sheets, and LibreOffice open it. Microsoft lists it among the file formats Excel supports.
CSV field rules — commas, quotes, and line breaks — follow RFC 4180. Quoted fields are unwrapped before they are written into the workbook.
Cells are stored as text, so a code like 001 is not shortened into a number. Formula-like text such as =1+1 is stored as text and is not calculated on export.