assimp
Client for the Open Asset Import Library. tldr-pages
On several platforms
Several platforms
Client for the Open Asset Import Library. Supports loading of 40+ 3D file formats, and exporting to several popular 3D formats.
List all supported import formats
assimp listextIdentifyList all supported export formats
assimp listexportIdentifyConvert a file to one of the supported output formats, using the default parameters
assimp export input_file.stl output_file.objIdentifyConvert a file using custom parameters (the dox_cmd.h file in assimp's source code lists available parameters)
assimp export input_file.stl output_file.obj parametersIdentifyDisplay a summary of a 3D file's contents
assimp info path/to/fileIdentifyDisplay help
assimp helpIdentifyDisplay help for a specific subcommand
assimp subcommand --helpIdentify