  A diffusive process that is reset to its origin at random times, so-called
stochastic resetting (SR) is an ubiquitous expedient in many natural systems
\cite{Evans2011}. Beyond its ability to improve efficiency of target searching,
SR is a true non-equilibrium thermodynamic process that brings forward new and
challenging questions \cite{Fuchs2016}. Here, we experimentally implement SR
within a time-dependent optical trapping potential and give a quantitative
assessment of its thermodynamics. We show in particular that SR operates as a
Maxwell demon, converting heat into work from a single bath continuously and
without feedback \cite{Roldan2014, Ciliberto2019}. Such a demon is the
manifestation of the constant erasure of information at play in resetting that,
in our experiments, takes the form of a protocol. By tailoring this protocol,
we can bring the demon down to its minimal energetic cost, the Landauer bound
\cite{Lutz2015}. In addition, we reveal that the individual trajectories
forming this autonomous demon all break ergodicity and thereby demonstrate the
non-ergodic nature of the demon's \textit{modus operandi}.
