The New Jersey Department of State has six searchable databases on line that include about 336,000 entries in the State Archive Collections as follows:
Supreme Court Case Files, 1704-1844
Marriage Records, 1666-1799
Index to Marriages, 1848-1867
Legal Name Changes, 1847-1947
Revolutionary War Damages, 1776-1782
These on-line databases gives you the basic information. In the case of Index to Marriages, you see the groom and bride's names, location or place of marriage, place of registration, the date and the original document reference number. If you need the original document there are instructions on how to order, as well as some ordering limitations. The information here on line is free to access and free to use.
Here's the link: