The Open Science Framework (OSF) is a free, open-source web platform developed and operated by the non-profit Center for Open Science for research project management, sharing, and reproducibility. It hosts project pages, files, registrations (including preregistrations), data, code, and preprints, produces persistent public records and identifiers for projects/registrations, exposes an API, and integrates with third-party storage and services such as GitHub, Dropbox, Google Drive and Dataverse.