Presently, HeinOnline has four major library collections: the Law Journal Library, the Federal Register Library, the Treaties and Agreements Library, and the U.S. Supreme Court Library.

All of these libraries are image-based and fully-searchable, meaning that they provide exact page images and enable the researcher to view all pages as they originally appeared in hardcopy-including all charts, graphs, and photographs. Also, the libraries in HeinOnline provide comprehensive coverage from the inception of each publication, something no other online publisher currently offers.

Access to HeinOnline is provided by the Georgia State University College of Law Library.