I don't yet have the rep required to comment on @WimHill, so here goes as an answer:
Yes there is a version of Praveen Battula / Technovert's tool that works with SharePoint 2010, 2013 and Online. It is called SPImporter and is available at https://spimporter.codeplex.com/.
I tried it out just now and it worked fine to import a few hundred rows from an Excel 2007 spreadsheet into an Announcements list in SP2013 Server.
Note however that Praveen Battula / Technovert haven't published the source code yet, which is a requirement for projects hosted on CodePlex, so you will have to decide if it is safe to use the download setup binary as is.