Carl Jung described two directions of energy, extraversion and introversion, and four ways of taking in the world and deciding: sensing, intuition, thinking and feeling.
The fourth axis, judging and perceiving, was added later by Isabel Myers and Katharine Briggs.
12 questions, two options each. Pick whichever is truer for you.
Extraversion or introversion (E/I), sensing or intuition (S/N), thinking or feeling (T/F), judging or perceiving (J/P).
No. It is a short questionnaire written for this site, inspired by Jung's types. The judging/perceiving axis was added later by Myers and Briggs.
Yes. Every tool on RandomSofa is free, with no sign-up or install, and works on phones too.