All US Citizens and many foreign nationals who travel to Brazil require an entry visa prior to leaving their nations. Most Asian, Australian, American and French citizens are required to arrive with a visa; Britons and Germans are not. Your passport will normally be stamped for a 90-day stay.

Citizens of the following countries DO NOT need a visa to travel to Brazil for tourism purposes:
Andorra- Argentina - Austria - Bahamas - Barbados - Belgium - Bermuda -Bolivia - Bulgaria - Chile- Colombia - Costa Rica - Czech Republic - Denmark - Ecuador- Finland - France -Germany - Great Britain - Greece - Hungary - Iceland -Ireland - Italy - Israel - Liechtenstein - Luxembourg - Malaysia - Malta - Monaco - Morocco - Namibia - Netherlands - New Zealand - Norway - Paraguay - Peru -Philippines - Poland - Portugal - San Marino - Slovenia - South Africa - South Korea - Spain - Surinam - Sweden - Switzerland - Thailand - Trinidad & Tobago - Tunis - Turkey - Uruguay - Vatican.

The times quoted are the time in the Consulate. Time spent in transit from and to you are additional. Plan accordingly.

Consulates
There are one or more embassies of Brazil at the different countries. In Brasilia, Sao Paulo and Rio are the respective consulates for each country...

Longer stays: Academic visits
Unpaid participation in a scientific/academic seminar or conference sponsored by a research or academic institution...