Convert EXCEL to CSV online for free
1: Choose multiple local EXCEL files or enter the URL of an online EXCEL file. 2: Choose "CSV" as target format and set options (optional). 3: Click the "START CONVERSION" button to convert EXCEL files to CSV online.
Choose filesChoose files or enter remote file URLenter remote file URL
Set conversion options (optional)
Microsoft Excel Binary File Format
File extension: .xls
Microsoft Excel up until 2007 version used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML-based format called "XML Spreadsheet".
File extension: .csv
In computing, a comma-separated values (CSV) file stores tabular data (numbers and text) in plain text. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. The use of the comma as a field separator is the source of the name for this file format.