I have made a converter using a track pump chuck, a short length of hose, and the middle of a Schrader valve stem taken from a tubeless car tyre valve. The last of these is (once the rubber is removed) pretty much ideal for attaching to a length of hose, using a suitable clip. You can attach the compressor fitting to the converter and then use the chuck on presta in the normal way.
FWIW most of these tiny compressors are utter shite inside, and clap out very quickly indeed.
cheers