Web TimeSheet reports can be exported to MS Excel in two formats
CSV (Comma separated values)
XML (Extended Markup Language)
To select the format you prefer for exporting the reports follow the steps below:
Log into Web TimeSheet.
Click on Settings button at the top right corner (beside the logout button).
In the Edit User preferences screen, locate Report Excel Export Format.
In the drop down beside Report Excel Export Format change the format to .xml or .csv.
How to export data from Web TimeSheet to Excel?
What are the differences between CSV and XLS (Excel) file formats?