An NZB file is sort of like a torrent file–it points to resource locations on the Usenet and doesn’t do much of anything without the apps and services to handle it. To download the files listed on them, you’ll also need to subscribe to a Usenet provider. NZB indexes are used to find files or parts of files on the Usenet and subsequently download them using a newsreader app. You will not need to pay for and configure any indexers. This is why we recommend Easynews, which gives you unlimited Usenet access with a free Usenet search interface. Sonarr, Radarr, Couchpotato and Sickbeard users will need an indexer that offers an API key, which mostly require registration and sometimes a paid account. Each index varies in its completeness, ease of use, range of filters, speed, and number of searches allowed per day for free users. NZB search engines, also known as NZB indexes or indexers, primarily come in three varieties: public (no registration), open (registration required), and invite-only (private). It scored highly during our testing for speed, completion and retention rates and is easy to setup. This list does not cover private or invite-only indexersĮasynews is our top choice, but if you prefer to use NZB Search Engines with your own newsreader software, we recommend UsenetServer.Sonarr, Radarr, Couchpotato and Sickbeard users will need an indexer with an API, most of which require registration.Factors to consider when choosing an NZB indexer: retention, max number of downloads and API hits per day, filters and sorting options, previewing, completeness, and watchlists.These are raw Usenet search indexes and unlike Easynews, do not include search result previews nor Usenet access. Otherwise, check out Binsearch or NZBIndex for a no-registration, free indexer.A free trial and lifetime discount is available through the link above. It’s also one of the only Usenet + search services that you can use on both mobile and desktop. You’ll get unlimited Usenet access plus a Usenet search interface with the best Usenet search results.

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