  We present a spectral catalog for blazars based on the BeppoSAX archive. The
sample includes 44 High-energy peaked BL Lacs (HBLs), 14 Low-energy peaked BL
Lacs (LBLs), and 28 Flat Spectrum Radio Quasars (FSRQs). A total of 168 LECS,
MECS, and PDS spectra were analyzed, corresponding to observations taken in the
period 1996--2002. The 0.1--50 keV continuum of LBLs and FSRQs is generally
fitted by a single power law with Galactic column density. A minority of the
observations of LBLs (25%) and FSRQs (15%) is best fitted by more complex
models like the broken power law or the continuously curved parabola. These
latter models provide also the best description for half of the HBL spectra.
Complex models are more frequently required for sources with fluxes F_{2-10
keV} > 10^-11 cm-2 s-1, corresponding to spectra with higher signal-to-noise
ratio. As a result, considering sources with flux above this threshold, the
percentage of spectra requiring those models increases for all the classes. We
note that there is a net separation of X-ray spectral properties between HBLs
on one side, and LBLs and FSRQs on the other, the distinction between LBLs and
FSRQs is more blurry. This is most likely related to ambiguities in the optical
classification of the two classes.
