BTJunkie was a BitTorrent search engine operating between 2005 and 2012. It used a web crawler (similar to Google) to search for torrent files from other torrent sites and store them on its database. It had nearly 4,000,000 active torrents and about 4,200 torrents added daily (compared to runner-up Torrent Portal with 1,500), making it the largest torrent site indexer on the web During 2011, BTJunkie was the 5th most popular BitTorrent site.
BTJunkie indexed both private and public trackers using an automatic web crawler that scanned the Internet for torrent files. Cookies were used to track what a visitor downloaded so that there was no need to register in order to rate torrents. The ratings and feedback given by people were used to help filter and flag malicious torrents uploaded to the website.