The Observatorio Astrofísico de Javalambre (hereafter OAJ) is a new Spanish astronomical facility devoted to carry out large sky multi-filter surveys with two telescopes of large field-of-view (FoV): the Javalambre Survey Telescope (JST), a 2.5m with 3deg FoV, and the Javalambre Auxiliary Survey Telescope (JAST), an 80cm with 2deg FoV. Both telescopes are equipped with panoramic cameras that amount to 1.3Gpix and are able to host more than 80 different filters simultaneously. During the first years of operation, the OAJ will be mostly devoted to conduct the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS) and the Javalambre Photometric Local Universe Survey (J-PLUS). J-PAS will observe 8.500deg2 of the sky visible from Javalambre with a set of 54 narrow-band contiguous optical filters plus 5 broader ones, performing in the end as a low resolution IFU of the Northern hemisphere. It will provide unprecedented spectral energy distributions for every pixel of the sky, and ultimately for more than 200 million galaxies. J-PLUS is now beginning to observe the same sky area of J-PAS with 12 narrow, intermediate and broad-band filters aimed to provide the photometric calibration of J-PAS and unprecedented multicolor data for many fields of the Astrophysics. Both J-PAS and J-PLUS will provide powerful 3D views of the Universe that will be made publicly available to the community as legacy projects. In this talk I will present the OAJ and the J-PAS and J-PLUS projects, describing the survey strategies and their main scientific objectives and capabilities.