Nationals of certain countries can visit Brazil for up to
three months without a visa, these are listed at the website of the Ministerio Das Relacoes Exteriores
If you intend to take up paid work in Brazil you will require a work permit.
If you intend to visit Brazil, on holiday, a business trip, to study, work, volunteer or as an emigrant you should get up to date and accurate information from the Ministerio Das Relacoes Exteriores