Quartus FPGA Bit Stream Reversal Tool written in python.
In a terminal of your choice with python installed, use the following instruction to reverse the bitstream:
python rev.py bitstream.ttf
On Unix systems you can pipe the output directly into a file like this:
python rev.py bitstream.ttf > bitstream_reversed.tff
This script was tested with python versions 3.3.5 - 3.9.7