# mktorrent > Create BitTorrent metainfo files. > More information: . - Create a torrent with 2^21 KB as the piece size: `mktorrent {{[-a|--announce]}} {{tracker_announce_url}} {{[-l|--piece-length]}} {{21}} {{[-o|--output]}} {{path/to/example.torrent}} {{path/to/file_or_directory}}` - Create a private torrent with a 2^21 KB piece size: `mktorrent {{[-p|--private]}} {{[-a|--announce]}} {{tracker_announce_url}} {{[-l|--piece-length]}} {{21}} {{[-o|--output]}} {{path/to/example.torrent}} {{path/to/file_or_directory}}` - Create a torrent with a comment: `mktorrent {{[-c|--comment]}} "{{comment}}" {{[-a|--announce]}} {{tracker_announce_url}} {{[-l|--piece-length]}} {{21}} {{[-o|--output]}} {{path/to/example.torrent}} {{path/to/file_or_directory}}` - Create a torrent with multiple trackers: `mktorrent {{[-a|--announce]}} {{tracker_announce_url,tracker_announce_url_2}} {{[-l|--piece-length]}} {{21}} {{[-o|--output]}} {{path/to/example.torrent}} {{path/to/file_or_directory}}` - Create a torrent with web seed URLs: `mktorrent {{[-a|--announce]}} {{tracker_announce_url}} -w {{web_seed_url}} {{[-l|--piece-length]}} {{21}} {{[-o|--output]}} {{path/to/example.torrent}} {{path/to/file_or_directory}}`