The Directory of Open Access Journals is an Open Access service that indexes the largest collection of peer-reviewed journals published by academic presses and scientific societies, available to users under open licenses.

The Directory of Journals has been maintained by librarians at Lund University (Sweden) since May 2003.

DOAJ operates as an independent, non-profit organization, and journals that wish to be included in the DOAJ directory must meet certain criteria regarding quality, open access, and other aspects related to scientific publishing.