Easy way to generate a magnet link from an hash. Some site share the hash as "http://... /hash". in this case you can just copy and past the full url, the generator will extract the hash for you.
Magnet links are an alternative way to download and share bittorrent files. A magnet link is in essence a link containing as short unique code to identify a specific torrent file called hash. With the magnet link torrent clients can download the torrent file and successively the file or files shared by the torrent without any additional step.
Magnet links are easier to share between users compare to torrent files but they can also be use for more than just torrents.
Magnet links are different from torrent files. A torrent file is a small file that contains all the necessary information to download a larger file. A magnet link is instead just a link that enable the download of a torrent file with the usage of a torrent client.
When you are using magnet links, you are still donwloading torrents files. Just in a more userfriendly way.
To use magnet links (also known as magnet URIs) you only need to have a bittorrent client that supports them. The great majority of the popular torrent clients support magnet links already. You don't need to do anything else than open the link.
Many websites provide only the hash part of a magnet link, although is very easy to create the magnet link yourself a generator can be a quicker way for the wast majority of the users.
The magnet link is generatad by placing togheter different pieces of information:
A torrent p2p network is composed of nodes. Each node acts as a tracker. Torrent clients come installed with a number of known tracker nodes (DHT). Generally you don't need to add trackers to a magnet link.
It may be usefull to include trackers when the resource identified by the hash is not very popular.
Is a key to retrieve the torrent file.
Magnet links are like any other link. They are legal unless used to share illegal distribution of copyrighted content.
Downloading a torrent with a magnet link it is not different in terms of security than downloading with a torrent file.