Feed43 is an online service to generate RSS feeds for websites that do not already provide them. With this in place, users can be notified of new content on these sites using standard news aggregators (like feedly, newsblur, etc). Users need not create an account on the Feed43 site in order to begin creating feeds. To create a feed, users must specify a URL to check and a series of patterns that describe what to extract from that URL. A detailed pattern reference and step-by-step feed creation tutorial are available in Feed43's Help section. Users who opt to register for an account will gain access to additional features like a "My Feeds" dashboard and the ability to export a list of feeds as an OPML file. Feed43's free service tier includes an unlimited number of feeds, but limits these feeds to the 20 most recent items and updates them every six hours. Paid plans are available that incorporate larger numbers of items and more frequent updates.