Avengers Infinity War is probably the best Marvel movie so far. If you want to watch Avengers Infinity War online free then here are a few streaming options (we checked these as recently as January 2019):

 

Just cancel before the 30 days is up and you don’t pay anything, simple. If you’re wanting to watch Avengers Infinity War for free and in high quality right now, then a free trial with Amazon Video is your best option.