The postprocessing script is used to modify the response data after it is received from the target application. This can be useful for decoding responses, extracting specific data, or other response modifications.
--postprocess=postprocess.py Use given script(s) for postprocessing (response)Source: SQL Injection/SQLmap.md in PayloadsAllTheThings. From PayloadsAllTheThings by Swissky and contributors. MIT License, Copyright (c) 2019 Swissky.