No visa is required by passport holders from Argentina, Armenia, Azerbaijan, Brazil, China, Cuba, Georgia, Hong Kong, Israel, Kazakhstan, Kyrgyzstan, Macao, Moldova, Mongolia, Montenegro, Qatar, Russia, Serbia, Tajikistan, Turkey, Ukraine, Uzbekistan and Venezuela.
Visa free access is available to those entering through Minsk Airport. For Passport holders from European Union, Albania, Andorra, Antigua and Barbuda, Australia, Barbados, Bahrain, Bosnia and Herzegovina, Canada, Chile, Dominica, El Salvador, Iceland, Indonesia, Japan, Kuwait, Liechtenstein, Malaysia, Mexico, Micronesia, Monaco, New Zealand, Nicaragua, North Macedonia, Norway, Oman, Panama, Peru, Saint Vincent and the Grenadines, San Marino, Saudi Arabia, Seychelles, Singapore, South Korea, Switzerland, United Kingdom, Uruguay, Vanuatu and Vatican City.
Nationals from Latvia, Lithuania and Poland can travel to Belarus without a visa if they travel by land and and cross from Latvia, Lithuania or Poland.
The same people who can enter through Minsk airport can also enter Brest-Grodno by getting a permit from a tour operator. There is a list through the link below.
Brest Grodno visa free
Belarus visa requirements