What Are Seeders, Leechers and Peers in Torrenting

Individuals sharing files over torrent networks are grouped into 3 major categories: seeds, leeches and peers. A seed is a member of the torrent swarm that has already downloaded the entire torrent file. Leechers and peers are members of the swarm that haven’t downloaded the entire torrent file yet.


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What Does Seed Mean?

In BitTorrent sharing, a seed is a BitTorrent user who has 100% of a file and is sharing it for other BitTorrent users to download. A leech, on the other hand, is a BitTorrent user who downloads the files shared by the seeds and does not seed back to other users.


The download time for a file shared via BitTorrent depends on the number of seeders available for that file; more seeders mean higher torrent speed.

Techopedia Explains Seed

In addition to seeders and leechers, there are peers who are users downloading a file, have part of it, yet are simultaneously uploading the downloaded part to other users. Even though the peers share back the files simultaneously, the actual torrent speed mainly depends on the number of seeders available for the shared file.

When downloading a file, a leech or a peer is not downloading the file from the actual site it is in, but is downloading it from a seed’s computer.

For example, assume that a seed is seeding a file at 50 kbps, and there are five leechers to download that file. Initially, the file is shared at 10 kbps each for every leech. When the leechers finish downloading, and if they seed back the file at the same speed of 50 kbps, the total torrent speed increases to 300 kbps. This process continues depending on the number of seeders and leechers for that specific file.

On the contrary, if the leechers decide not to seed the file after completely downloading it, the original seeder is stuck as the only one seeding the file. The more seeds, the better the download rate. However, it is good to have more peers in addition to the seeders, as the downloaders can utilize both.

Once a file is fully seeded, the BitTorrent application automatically stops the seeding process and the file can then be removed from the seeding list.

What Are Seeders, Leechers and Peers in Torrenting?

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You don’t need to know much about how torrenting works to download a torrent file. However, torrenting terminology is somewhat confusing.

If you’re trying to get make sense of torrenting jargon, just follow the tutorial below. By the time you’re finished reading it, you’ll have a clear understanding of all the mysterious technical terms you may encounter when you download a torrent file.

Once you understand how torrenting works, you’ll have a better idea of how torrenting relates to internet privacy and other important issues that you should be aware of as well.

Torrenting terminology in a nutshell

Torrenting represented a huge leap forward for file sharing because it allowed individual internet users to share files with each other directly. Before torrenting, people had to use huge expensive file servers to share files. If the file server went offline, so did all of its files.

In contrast, files stored across global torrent networks are nearly impossible to take offline. Torrent network are commonly referred to as swarms. Swarms are made up of ordinary PCs and laptops located all over the world.

Individuals sharing files over torrent networks are grouped into 3 major categories: seeds, leeches and peers. A seed is a member of the torrent swarm that has already downloaded the entire torrent file. Leechers and peers are members of the swarm that haven’t downloaded the entire torrent file yet.

Still confused?

As mentioned above, torrenting terminology is somewhat technical and abstract. The best way to explain how these terms relate to torrenting is to actually walk through the process of downloading a torrent file from start to finish. As we move through each step, I’ll provide a short and to-the-point explanation for each term that we encounter along the way.


  • BitTorrent software. You can complete this tutorial with any type of BitTorrent client (aka “torrent downloader”) but I’ll be using qBitorrent. We like it because it’s totally free, easy to use and doesn’t contain any adware. qBittorrent is available on many different platforms including Windows, macOS and Linux. Click here to download it.
  • VPN (optional). As always, we advise that you turn on your VPN before you download any torrent file. VPNs keep you safe and anonymous when you’re online. The VPN I’ll be using for this tutorial is IPVanish. IPVanish is a complete privacy solution for torrenters and offers top-tier speeds. Click here to get 25 percent off the normal monthly subscription price.

Before we proceed

We highly recommend using a VPN before torrenting anything. Users who torrent certain types of files have been known to receive copyright infringement notices from their ISPs. If you would like to keep your streaming habits private, our recommendation is IPVanish – a complete privacy solution for people who torrent.

Source: IPVanish

Step #1: Turn on your VPN

This step is optional. You technically don’t need a VPN to download torrents. Torrenting works just fine with or without a VPN. However, if you download a torrent file without the protection of a VPN, your ISP will know it.

To see hard proof of how public the internet really is, just visit iknowwhatyoudownload.com. This site identifies your internet connection, then it pulls up a list of all the torrent files that are associated with it.

Source: IPVanish

Sites like iknowwhatyoudownload.com are very basic, public tools that anyone can use. It can’t pull up every single torrent you’ve ever downloaded, but it can pull up pieces of your download history. Your internet provider has access to even more detailed information.

The only way to stay completely anonymous online is to login to a virtual private network (VPN) every time you use the web.

If privacy isn’t a concern, go ahead and proceed to step #2. Otherwise, we advise that you connect to IPVanish or another trustworthy VPN service before you continue.

Step #2: Find a torrent

To give you a practical example of how torrenting terms apply to real life, I’ll be downloading the free operating system known as Linux from the torrent site called linuxtracker.org.

Note that we are using this particular example because 1, Linux is a free, open-source software that can be legally torrented, and 2, because it will be easy for you to follow along with what we’re doing. This is because information about the torrent is publicly available at the link shown above.

If you open the linuxtracker site in your browser and scroll down to its torrents section, you’ll notice that there are a few columns lined up next to the torrent files. The important columns are the ones highlighted in blue: the “S” and the “L” columns.

Source: IPVanish

The “S” stands for seeders, and the “L” stands for leechers. You will see the same two fields on almost any torrent website.


People who have the entire torrent file on their computer are referred to as seeders. Having downloaded the file already, these users are uploading pieces of the file to help other users (leechers) download it. The more seeds there are for a torrent, the more people there are uploading pieces of the file, and the faster everyone’s downloads will go. But if no seeds exist in the torrent network, nobody in it will be able to download a complete version of the file until a seed comes back online.

After you finish downloading a file, you’ll become a seed automatically, and start uploading that file for others to download.


The definition of the term “leecher” has evolved over the years, but is generally used to refer to people that have not downloaded 100% of the file, and are currently in the process of downloading it.

Originally, leecher was used in a negative sense to describe people that refused to share their torrent files by using modified clients or severely limiting their uploading speed. Like the blood sucking worms that live in swamps, torrent leeches were also parasitic. Taking without giving anything back to the group.

Contrary to popular belief, leechers nowadays aren’t only downloading the file. They are also uploading the file as they download it, albeit at a (usually) much lower rate than the speed with which they are downloading it.

These days, there’s no easy way to torrent if you don’t want to upload at least a little bit. Although you can choose not to seed after the torrenting is finished by removing it from your torrents list, you will usually be forced to upload at a minimum rate of 1kb/s.

qBittorrent blocks you from turning your upload limit down to anything less than 1 KiB

Step #3: Download a torrent

Now that you know what seeds and leeches are, you can compare the strength of different torrent files and guesstimate how fast they’ll download.

The fastest torrents are the ones that have a large percentage of seeders within the swarm. The more people there are seeding, the more people there are that are uploading the file for you to download.

This means that even torrents with large numbers of seeders can be slow, provided that the number of leechers outnumbers the number seeders. For example, a torrent with 100 seeders and 500 leechers (where 20% of the swarm is comprised of seeders) is likely to be faster than a torrent with 1,000 seeders and 10,000 leechers (where 10% of the swarm is comprised of seeders). Please note that its very possible for torrents to have more seeders than leechers, and this can often be the case.

That said, there is key assumption being made here: That all seeders and leechers are downloading and uploading at the same speed. In reality, its possible that one seeder might be able to upload the file at a much faster rate than another. Or, that one leecher is able to download a file at a much faster rate than another. It just depends on the internet connection.

In certain cases, larger swarms may often yield faster, and more stable download speeds than smaller ones, even if the ratio of seeders to leechers is lower.

To illustrate this, let’s compare a popular torrent with a large swarm to a not-so-popular torrent with a very small swarm.

Please note that in qBittorrent, the word “Peer” is used as a substitute for leech. We will discuss what the term means more in-depth in the section below.

Source: IPVanish

As you can see in the screenshot above, my Debian Linux torrent download is crawling along at about 728 KiB/s. Yet, my Kali Linux torrent download is over 8 times as fast.

Think about it this way. If you only have 11 seeders, it’s more probable that the average upload rate is low (simply because you have less data points), than if you took the average upload speed of 500 seeders.


As mentioned above, the term “peer” can sometimes serve as a nicer sounding substitute for the word “leech.”

Most applications, such as qBittorrent or uTorrent refer to torrenters with incomplete files (still downloading) as peers. But if you download a torrent from a website, you’ll probably see the word leech used instead.

For example the qBittorrent software program uses the term peer, but the linuxtracker.org website uses the term leech. But they are both referencing the same thing: individual computers in the torrent swarm that are missing part of the torrent file. Once a peer downloads the entire file, they become a seed.

Note: To make things even more confusing for everyone, the term “peer” is sometimes used as a generic term to describe all the different individual members of the swarm. In other words some people consider seeds to be peers, because both seeds and peers participate in the swarm.

Step #4: Share your torrent with the swarm

After you’ve finished downloading your torrent, it will automatically become a seed. At this point, you have 3 different options.

  1. Continue sharing your seed.
  2. Exit out of your torrent client.

Exiting out of your Bittorent client will take your torrent off the network, preventing you from seeding it and contributing bandwidth to other downloaders. Conversely, if you remain online and stay active as a seed, other people in the swarm will benefit from the bandwidth that you contribute to the group.

Because sharing your file only takes up a very small amount of bandwidth, you probably won’t notice any change in your internet speed if you remain online as a seed. On the other hand, if you plan on streaming a movie or playing a bandwidth intensive multiplayer game then every little bit of bandwidth makes an impact. So, if you’re doing something online that uses up a lot of bandwidth you may want to consider pausing your torrent or logging out of qBittorrent altogether.


There are four main terms you should know about if you like to download torrents on the web: swarm, seed, leech and peer.

  • Swarm. This word refers to all the connections involved in sharing a particular torrent file. The larger the swarm, the faster the download. Each member of the swarm contributes a small amount of bandwidth to the group. Swarms are made up of ordinary consumer grade PCs and laptops, not high performance servers.
  • Seed. Seeds are what help you or me download a torrent. Seed computers in the swarm have the entire torrent file saved to their hard drives, and upload pieces of it to help others download it. There’s no way to download 100 percent of a file from a torrent if no seeds are present inside the swarm. After a leech or a peer finishes downloading a file, they automatically become a seed.
  • Leech. The term “leech” refers to an individual computer on a torrent swarm that has an incomplete version of the torrent saved to its hard drive. The leecher is using the bandwidth contributed by the seeders to download their file.
  • Peer. The word “peer” has two main meanings when its used to describe computers on torrent networks. Sometimes peer is used in a generic way to refer to all the individual members of a torrent swarm. For example, torrent networks are often referred to as “Peer-to-Peer” (aka P2P) networks. However, “peer” can also be used as a substitute for the term “leech.” Many popular software programs for torrenting use the term “peer” instead of leech to refer to computers in the swarm that haven’t downloaded 100 percent of the torrent file.

Desiree Wu

Desiree Wu • Editor

Desiree is a full-time Honours Business Administration student at Ivey Business School at Western University. She also served as an Editorial Intern at Flixed. Desiree is based in London, Ontario.

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