About this tool
Excel in much of Europe wants semicolons, other programs want commas or tabs. Drop in a file, choose the separator you need, and download a converted copy with every value left exactly as it was.
It works in your browser, so your data is never uploaded.
How to use it
- Drop your CSV file onto the box, or click it to choose one. The tool shows the separator it found.
- Choose the separator you want: comma, semicolon, tab or pipe.
- Choose Windows or Mac/Linux line endings if a program needs a particular one.
- Press Download converted file.
Why the separator matters
A CSV file (comma-separated values) isn't always separated by commas. In countries that write decimals with a comma (1,5 for one and a half), spreadsheet programs use semicolons instead, so a file that opens neatly in one person's Excel appears as a single column in another's. Changing the separator fixes that.
Quoted values are handled properly
Commas, semicolons and line breaks inside quoted cells are kept inside their cells, and quotes are added where the new separator appears in a value. Nothing is split, merged or reformatted: only the separator and (optionally) the line endings change.
Tab-separated files
Choosing tab gives a .tsv file, which is useful for pasting into spreadsheets and for programs that read tab-separated text. Pipe-separated (|) files are used in some databases and data feeds.
Accents and encoding
The tool detects the file's text encoding (UTF-8 or Windows-1252, the usual Excel format) and saves the result as UTF-8 with an optional marker so Excel shows accented letters correctly. Excel workbooks (.xlsx) aren't read directly; save them as CSV first.
Frequently asked questions
How do I change a CSV from comma to semicolon?
Drop the file in, choose Semicolon as the new separator, and download the converted file.
Why does my CSV open in one column in Excel?
Excel expects the separator your computer's region uses. Converting the file to that separator (often a semicolon in Europe) fixes it.
Will it change my data?
No. Only the separator and line endings change; every value is kept exactly as text.
Is my file uploaded?
No. The conversion is done by your browser on your own device.
Can I convert to tab-separated?
Yes. Choose Tab, and the file is saved with a .tsv extension.
Does it keep accents like é and ü?
Yes. The file is saved as UTF-8, and the optional marker helps Excel display them.
Last reviewed 29 September 2026. Your files are processed by your browser and are never uploaded.