A C++ version of pySHPtoJSON that do parallel conversion, making it way faster. It has a limitation of only being capable to generating GeoJSON files.
All maps are downloaded from IBGE (Instituto Brasileiro de Geografia e Estatística), the agency responsible for statistical, geographic, cartographic, geodetic and environmental information in Brazil and were published on 2022.
Download the release binary and execute it as ./shptojson mesh where mesh should be BR or UFs. Make sure that shptojson file has execution permission.
GeoJSON files will be generated inside geoJSON/ directory.
Running ./shptojson BR will generate GeoJSON files for
Brazil and ./shptojson UFs for each of its states, municipalities, macro and microregions. They are located in BR/ and UFs/ subdirectories.
Also, several original compacted shapefiles files are stored in the shp directory contains these files downloaded from IBGE. If you wish you may delete this extra directory after conversion.
You might need to install TBB library (libtbb2 on Debian/Ubuntu) for multi-core processing.