There was no major live-action Batman feature film released in 2017. The search term likely refers to one of the following projects released around that time:
As of this writing, The Lego Batman Movie frequently rotates through "freemium" services. Check these platforms: batman 2017 free
I'm assuming you're referring to the 2017 film "Batman v Superman: Dawn of Justice" or possibly "Justice League" (also released in 2017), but since you mentioned "Batman 2017 free," I'll provide information on how to watch or stream Batman-related content from 2017 without paying. There was no major live-action Batman feature film
The year featured two distinct live-action and animated cinematic experiences: Justice League The year featured two distinct live-action and animated
When people search for "free" movies, they often wander into the dark alleys of the internet—torrent sites, illegal streaming platforms, or YouTube rips.
Since this is the crown jewel of the "Batman 2017" search, here is the step-by-step guide to watching it legally for $0.
Go watch the Brick Knight save the day. It won't cost you a cent—just a few minutes of commercials or a quick trip to your library’s website.