Use a backup tool, things can be easiler.
I recommend this guide for you, with this, you can transfer the contact from android to pc. Then you can easily edit or manage the contacts.
Google and Android are all about syncing and accessing same data from multiple devices. If you have already synced your contacts with your Google account, then this is easy as a pie to access your device's phone book from any PC via a desktop browser. follow the instruction:
1. Make sure you have synced your contacts with your Google account
2. Open a desktop browser and go to: google.com/contacts
3. Now, enter the username and password for the account you would like to see the contacts
4. Now you should see the entire contacts of your Android device