A .csv file can be opened by simply importing the file with Microsoft Excel. Importing the file allows Excel to adjust any formatting differences from the application that created the file. The file extension ".csv" refers to Comma-Separated Variables and is used by many spreadsheet applications.
Excel creates spreadsheets that have this file extension by default. The main features of .csv files are that each record is in a single line and fields within the line are separated by a comma to indicate column placement within the line. Spreadsheets are often used for compiling and sorting data within databases. Users can export .csv files as text files, and text files can be imported for use as a spreadsheet.