You can use the open source GNU PSPP statistical software in order to convert .csv data files to SPSS data sets (.sav). You may also find various websites that offer quick conversion of these file types. Some .csv files may not be valid so users first import them in Excel and save as .xls which can then be also imported in SPSS/PSPP.
Convert Comma Separated Value to SPSS Data Sets database.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert csv to sav on Windows
A free alternative to SPSS
Convert from csv file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.