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We present the \texttt{YBC} database of stellar bolometric corrections (BCs),available at \url{http://stev.oapd.inaf.it/YBC}. We homogenize widely-usedtheoretical stellar spectral libraries and provide BCs for many popularphotometric systems, including the Gaia filters. The database can be easilyextended to additional photometric systems and stellar spectral libraries. Theweb interface allows users to transform their catalogue of theoretical stellarparameters into magnitudes and colours of selected filter sets. The BC tablescan be downloaded or also be implemented into large simulation projects usingthe interpolation code provided with the database. We compute extinctioncoefficients on a star-by-star basis, hence taking into account the effects ofspectral type and non-linearity dependency on the total extinction. Weillustrate the use of these BCs in \texttt{PARSEC} isochrones. We show thatusing spectral-type dependent extinction coefficients is quite necessary forGaia filters whenever $\Av\gtrsim 0.5$\,mag. BC tables for rotating stars andtables of limb-darkening coefficients are also provided.

YBC, a stellar bolometric corrections database with variable extinction coefficients: an application to PARSEC isochrones