| Your chords by key table has errors - the vii chord in any Major key is not based on the b7th, but on the natural 7th. The chord is a minor7(b5) (which, by the way, is a much more clear description than is "half diminished"). So, the chords in that final column should be:
B-7(b5)
F#-7(b5)
C#-7(b5)
G#-7(b5)
D#-7(b5)
Also, you left out the remaining seven keys.
Good tool, however.
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