Why convert TXT to CSV?
Programs that import data - spreadsheets, databases, and analysis tools - expect .CSV format with a defined delimiter and optional header row. A .txt extension is often skipped or misread by these importers. Re-saving the file as .csv tells the software which structure and delimiter to expect.
How to convert TXT to CSV
Microsoft Excel PAID
Open the TXT file in Excel - the Text Import Wizard asks for the delimiter and shows a column preview; save via File > Save As > CSV (Comma delimited).
LibreOffice Calc FREE
Open the TXT file in LibreOffice Calc, set the delimiter in the Text Import dialog, then save as Text CSV (.csv).
Rename the file BUILT-IN
If the TXT is already comma-delimited, rename data.txt to data.csv - the content stays identical and most importers will parse it correctly.
Command line - sed CLI
Replace tab delimiters with commas using sed 's/\t/,/g' data.txt > data.csv.
About these formats
.TXT
Plain Text File
A TXT file is plain, unformatted text - the simplest document format on any computer. Double-click it: Windows opens it in Notepad, macOS in TextEdit, Linux in gedit. Nothing to install. If…
Open .TXT details →
.CSV
Comma-Separated Values
A CSV file stores tabular data as plain text - one row per line, values separated by commas (or semicolons in European locales). Any spreadsheet opens it: Excel, Google Sheets, LibreOffice…
Open .CSV details →Quality & what to watch
- Conversion only works on tabular
TXTfiles - free-form prose with no consistent delimiter cannot be mapped to CSV columns. - If non-English characters look garbled after import, set the character encoding to UTF-8 in the import wizard or dialog.
- If any field value contains the delimiter character, it must be wrapped in double quotes in valid CSV; a simple rename does not add these quotes automatically.
