Download TUSH or NSRT today and enjoy a seamless, error-free SFC experience.

For the more technically inclined, is an extremely powerful Swiss Army knife of emulation utilities. It supports a vast array of operations, including various image format conversions (e.g., SMC to SFC), ROM header manipulation, and much more. It is a command-line tool, which can be intimidating for some, but it is one of the most comprehensive utilities available. For example, to convert an SFC file to an SMC file by adding a header, you could use a command like ucon64 -smc mario.sfc .

Alternatively, many converter tools will automatically detect and handle the header correctly.

There is no software that takes a Super Mario World.smc file and outputs a file you can load into Super Mario Maker 2 . There is no "File > Open" for ROMs inside Mario Maker.

If you have 100 ROMs to convert, use this PowerShell (Windows) or Bash (Mac/Linux) script with TUSH.exe: