My bookmarks were synced to my android device. Then my computer was reformatted. How do I get my bookmarks from my device back onto my computer?

Both the device and the reformatted computer are linked to my sync account, but while the device has all my bookmarks, the computer is empty. I synced and re-synced and did the whole backup-restore thing, but nothing. I don't want to do something that will wipe out the bookmarks on the android device, too, but I can't find any instructions that help me with this.