MIME Application Info

MIME Application/x-csv

Mime application/x-csv is a non-standard mime type that indicates the presence of a comma separated values (CSV) file.

Comma separated values files are most often used to exchange spreadsheet data amongst different spreadsheet applications. For example, while a Microsoft Works database file may not be easily opened by other spreadsheet programs, if the file is saved in the CSV format, other spreadsheet programs will be able to work with the data. Each “value” in a spreadsheet is separated by a comma which allows other programs to place the values in cells in a new spreadsheet. Officially, .csv files should be marked with the IANA mime type of text/csv.

This is the mime type on record with the Internet Assigned Numbers Authority as of October 2005. However, the CSV format has been in existence for far longer with programmers using their own variations such as text/tab-separated-values and mime application/x-csv. If Web servers, browsers, email clients, and other user agents have been programmed to recognize mime application/x-csv, then they will understand that the download or attached file is a comma separated values file and respond accordingly. If the user agent doesn’t recognize mime application/x-csv, it will likely perform additional scans of the file to determine its nature.

Whether mime application/x-csv or text/csv is used, the file is most likely a CSV file.

Related MIME Application Types

MIME text/csv

Related File Extension Types


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