Is using iPhone backup extractor safe?

My iPhone got stolen and I would like to recover my contacts at least to itunes or to my PC.

Sorry to hear that your iPhone got stolen.

There are many softwares which can recover from your iPhone's backup and are totally safe. I don't know about the procedure of iphone extractor but I have personally used Total Saver and found it to be a life saver. You just need to install and register it on the computer where you had backed up/synced your iPhone and it extracts and recovers all of the iPhone data for you. For $15, it is also the most economical than other similar softwares. I don't think they have a free trial of the software on their website, but you can download it from CNET or any other 3rd party software vendor. Simply search 'Total Saver' on google. (i've added the links in the answer sources to the Windows and Mac versions of the software).

Visit the link for the product website:- http://www.myphonedata.com

Hope this helps you