"Free" is a dance pop song composed in the key of D major.

The song was composed in the key of G major using common time with a groove at 104 beats per minute.

It was composed in the key of F major using common time at 118 beats per minute.

It is composed in the key of B minor.

This song is composed originally in the key of C major.

It is composed in the key of D major.

The song was composed in the key of A minor.

The song is composed in the key of B major.

The song is composed in the key of F major and set in common time.

The song is composed in the key of C minor.