If you are looking for birth, marriage and death records in the boroughs of NYC, then you can download digitized copies FREE here:
https://a860-historicalvitalrecords.nyc.gov/
Digitized Birth Records:
Bronx: 1872 to 1873, 1876, 1888 to 1891, 1895 to 1909
Kings (Brooklyn): 1866 to 1909
Manhattan: 1855, 1857 to 1861, 1863 to 1865, 1866 to 1909
Queens: 1866, 1876, 1883, 1886, 1888 to 1909
Richmond (Staten Island): 1898 to 1909
Digitized Marriage Certificates
Bronx: 1898 to 1937
Kings (Brooklyn): 1866 to 1937
Manhattan: 1866 to 1937
Queens: 1898 to 1937
Richmond (Staten Island): 1898 to 1937
Digitized Death Records:
Bronx: 1898 to 1948
Kings (Brooklyn): 1862 to 1948
Manhattan: 1866 to 1867, 1871 to 1875, 1920 to 1930
Queens: 1898 to 1948
Richmond (Staten Island): 1898 to 1948