There are websites like Boxopus, putdrive, Filestream.me, where one can create an account and paste the magnet link of the torrent. It will cache that torrent in some time. It will after completing the cache provide a download box, where you can download the torrent via IDM or your download manager. But free user has limited storage, and time of storage. Filesteam is good website it gives you 2-3 days of storage time, but once you stop downloading and you can not resume, and download starts from beginning. While boxopus gives just a day of storage time to free users to complete download and you can resume download, and also a limit of 2.5 GB, but the bandwidth changes everyday, and creating multiple accounts can solve the problem.