They are all text files, following the same "guidelines". The difference between the files are - as long as the creator followed some "rules", that: A csv file will have comma separated values and a tsv file will have tab seperated values. For .txt files, there is no formatting specified.
In this regard, what is the delimiter in a csv file?
In a comma-separated values (CSV) file the data items are separated using commas as a delimiter, while in a tab-separated values (TSV) file, the data items are separated using tabs as a delimiter. Column headers are sometimes included as the first line, and each subsequent line is a row of data.
What is the extension for a tab delimited file?
File formats that use the Clipboard
|Format||Extension||Clipboard type identifiers|
|DIF||.dif||Data Interchange Format.|
|Text (tab-delimited)||.txt||Tab-separated text format.|
|CSV (Comma-delimited)||.csv||Comma-separated values format.|
|Formatted text (Space-delimited)||.rtf||Rich Text Format (RTF). Only from Excel.|
Is Excel tab delimited?
If you're using Microsoft Excel: Open the File menu and select the Save as command. In the Save as type drop-down box, select the Text (tab delimited) (*.txt) option. Select the Save button.