What it is
The Excel to CSV Converter takes an .xlsx or .xls spreadsheet and gives back a plain .csv file: one line per row, values separated by a delimiter, and nothing else.
Why anyone wants a CSV
CSV is the format that everything reads. Databases import it, e-commerce platforms accept it for bulk product uploads, email tools take it for contact lists, statistics software opens it, and any programming language can parse it in a couple of lines.
The trade is that a CSV keeps only the values. Formulas become their results, formatting disappears, colours and merged cells vanish, and a workbook with several sheets becomes a single flat file. That loss is the point: it is what makes CSV portable.
How to use it
- Add your spreadsheet, in
.xlsxor.xls. - Pick the sheet if the workbook has more than one.
- Download the CSV.
Before you hand it to another system
Two details cause most import failures downstream.
The separator. Systems that expect a comma choke on a semicolon and the other way round. Check which one the receiving system wants before uploading.
The encoding. The file is written as UTF-8, which is the modern default and handles accented characters correctly. Some older systems still expect Latin-1 and will show accents as garbage.
Your file stays with you
The conversion runs in your browser, so the spreadsheet is never uploaded and never stored. A file full of customer names, salaries or prices never leaves your machine.
To go the other way, use the CSV to Excel converter.