grfcodec 6.0.6 GRF development tools
The Graphics Resource File (GRF) development tools are a set of tools for developing (New)GRFs. It includes a number of smaller programs, each with a specific task:
grfcodecdecodes and encodes GRF files for OpenTTD.
grfidextracts the so-called "GRF ID" from a GRF.
grfstripstrips all sprites from a GRF.
nforenumchecks NFO code for errors, making corrections when necessary.