Ttb.li is the online URL shortening and file sharing service of Tomttb (www.tomttb.com). It can be used to shorten URL's for usage in e-mails, Tweets, Facebook messages and more. The ttb.li API allows developers to integrate this service into their own web sites and applications. It consists of 4 parts: URL-shortener, URL-expander, File Sharer (beta) and Media preview (beta - for previewing shared pictures). Currently the beta services are not publicly available. The API uses RESTful calls and responses are in XML, JSON and TXT.