Migrate backlog items from ScrumWise to Visual Studio Online?

Our project currently is using Scrumwise for our agile project planning and we want to migrate to either JIRA or Visual Studio Online.

Is it possible to migrate backlog items (xml/csv/excel format) into VSO? Does it require a plugin tool or utility?

Using Excel can help you add work items into a team project in VSO.

• install Microsoft Excel 2007 or a more recent version.
• install visual studio to get the Team Foundation add-in to Excel
• in Excel, start with a blank worksheet, find Team ribbon and click New List to connect to your team project hosted in Visual Studio Online, then select Input list
• specify the titles of the work items you want to add and their work item type.
• publish your worksheet

Detailed information, you can refer to the MSDN documentation https://msdn.microsoft.com/en-us/library/vs/alm/work/office/bulk-add-modify-work-items-excel