Qbittorrent
An advanced and multi-platform BitTorrent client with a nice Qt user interface as well as a Web UI for remote control and an integrated search engine. qBittorrent aims to meet the needs of most users while using as little CPU and memory as possible.
Add .torrent file
To add a .torrent file to Qbitorrent via the Web Ui, you have two options either click file then Add torrent file or click the small white page icon. This will open your file explorer for you to add your .torrent file
Add Magnet Link
Adding a magnet link is the same. However, instead of adding a torrent file, you choose Add torrent link and paste your links in the dialog box. You can paste multiple at once