WorldBet is an ASCII encoding of the International Phonetic Alphabet (IPA) with additional symbols. One of its aims is to provide more non-English symbols, such as clicks, than earlier ASCII-mappings do (Kirshenbaum, X-SAMPA).
It is compiled and developed by James L. Hieronymus at AT&T Bell Laboratories. It was considered like X-SAMPA as an alternative to IPA in drafts of the Speech Synthesis Markup Language and VoiceXML. Worldbet is used in the CSLU Toolkit.