  We present a catalogue of white dwarf candidates constructed from the GALEX
and Gaia EDR3 catalogues. The catalogue contains 332,111 candidate binary white
dwarf systems and 111,996 candidate single white dwarfs. Where available, the
catalogue is augmented with photometry from Pan-STARRS DR1, SDSS DR12 and
classifications from StarHorse. We fit photometric data with modeled white
dwarf cooling sequences to derive mass, age and effective temperature of the
white dwarf as well as mass estimates for the companion. We test our
classifications against StarHorse, the Gentile-Fusillo Gaia EDR3 catalogue, and
white-dwarf-main-sequence binaries identified in SDSS DR12. This catalogue
provides a unique probe of the binarity of white dwarfs as well as the
abundance of white-dwarf giant binaries and large mass-ratio stellar binaries
which are difficult to probe otherwise.
