Simple Python script to parse XLS, XLSX, or CSV with URLs containing potential Base64 values in the URI and decode the values.
This script will take a XLS, XLSX, or CSV with a column of URLs and decode potential Base64 values. Use python base64URLDecode.py filename.xlsx output.xlsx
This script uses the bas64, re, openpyxl, urllib, itertools, sys, and os.path libraries.