Is there any tool to anlyze audio specturm of a song and give the average visually ? I have a lot of songs I made over the 20 years and was thinking it would be interesting to see how the overall EQ changed on the various songs I made.

Any tool out there to help me with something like this ?
Audacity will let you look at a song's spectrum/spectrogram, and it works with most audio formats.

It's also free!