If you need a compact compressor, I recommend Stanley DST100. It has 8 liter/2 gallon tank and 116 max PSI, was always enough to put tubeless + it's very helpful for quick drying after bike wash.

You can also place the inner tube under the tubeless tyre, inflate it and leave it for several hours (or a day, if time permits) so that the tubeless tyre flattens out and leaks less air when you try to inflate it again.