Batch converting Open office files

Ive been googling a lot and cant find anything creditable :/


I got a lot of text and spreadsheet files in different formats and i just acquired the new Office 2013 and i want all my files saved in the same format and i wonderet if i could find a program that does that and the only one i found so far is one that does not have Open Office support :/ 


Is it impossible to do it without doing it manually and with every single one?

Just install LibreOffice or OpenOffice yourself and you'll find a java util on your pc called JDOC that allows for one-setp CLI batch conversion.

Otherwise, I think Google Drive can also convert easily, if you upload allto Drive with the option to save in ODF then download again in the format of your choice.