Since Warner Bros. Discovery owns Max, this is the permanent streaming home for all eight Harry Potter films. If you subscribe to Max (starting at $9.99/month with ads), you get the entire Wizarding World library, including the upcoming Harry Potter TV series reboot.
If you're interested in exploring the Internet Archive for other content, here are some tips: Harry Potter Movies Internet Archive
While you can’t legally stream the full eight-film series for free there—as they are still under active copyright and primarily hosted on Max and Peacock—the Archive is a goldmine for rare Wizarding World content. What You Can Find Since Warner Bros
: Rare promotional items, such as the Prisoner of Azkaban Promotional DVD If you're interested in exploring the Internet Archive
Since the Harry Potter film franchise is under strict copyright, a direct streaming feature for the full movies would be legally infringing. Therefore, this feature pivots to the vast amount of legal content available on the Archive: