Opening SP4 files
Did your computer fail to open a SP4 file? We explain what SP4 files are and recommend software that we know can open or convert your SP4 files.
What is a SP4 file?
While we do not yet have a description of the SP4 file format and what it is normally used for, we do know which programs are known to open these files. See the list of programs recommended by our users below.
We are constantly working on adding more file type descriptions to the site - the current count exceeds thousand by far, and more information about SP4 files will hopefully be added soon.