  Cosmological simulations serve as invaluable tools for understanding the
Universe. However, the technical complexity and substantial computational
resources required to generate such simulations often limit their accessibility
within the broader research community. Notable exceptions exist, but most are
not suited for simultaneously studying the physics of galaxy formation and
cosmic reionization during the first billion years of cosmic history. This is
especially relevant now that a fleet of advanced observatories (e.g. James Webb
Space Telescope, Nancy Grace Roman Space Telescope, SPHEREx, ELT, SKA) will
soon provide an holistic picture of this defining epoch. To bridge this gap, we
publicly release all simulation outputs and post-processing products generated
within the THESAN simulation project at https://thesan-project.com. This
project focuses on the $z \geq 5.5$ Universe, combining a
radiation-hydrodynamics solver (AREPO-RT), a well-tested galaxy formation model
(IllustrisTNG) and cosmic dust physics to provide a comprehensive view of the
Epoch of Reionization. The THESAN suite includes 16 distinct simulations, each
varying in volume, resolution, and underlying physical models. This paper
outlines the unique features of these new simulations, the production and
detailed format of the wide range of derived data products, and the process for
data retrieval. Finally, as a case study, we compare our simulation data with a
number of recent observations from the James Webb Space Telescope, affirming
the accuracy and applicability of THESAN. The examples also serve as prototypes
for how to utilise the released dataset to perform comparisons between
predictions and observations.

Cosmology and Nongalactic Astrophysics;Astrophysics of Galaxies