Python library to interact with Nintendo 3DS files
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Python library to interact with Nintendo 3DS files.

The API is not yet stable. If you decide to use this, you should stick to a specific version on pypi, or store a copy locally, until it is stable.

This was recently separated out to its own repository. This will be a better README at some point.

Support can be found on Discord (info, invite link)

Supported types

  • CDN contents ("tmd" next to other contents)
  • CTR Cart Image (".3ds", ".cci")
  • CTR Importable Archive (".cia")
  • Executable Filesystem (".exefs", "exefs.bin")
  • NCCH (".cxi", ".cfa", ".ncch", ".app")
  • Read-only Filesystem (".romfs", "romfs.bin")
  • SD card filesystem ("Nintendo 3DS" directory)
  • SMDH icon ("*.smdh", "icon.bin")
  • Title Metadata ("*.tmd")


pyctr is under the MIT license.

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Python Library