This is a very helpful site for those with roots in the Chicago area or with relatives that lived there are may have passed through. While the actual documents are not on line, their datebases available make searching their records a breeze. Once you find the person and record number, you can order the original document from the county. You can search birth certificates, marriage licenses and death certificates. You'll need to register with your name and email address and create a password once you have read and agreed to the terms. Other than that, the site is free to search. Records here go back 136 years, starting in 1872.