The PWS-12 was a single-engined two-seat training biplane, fit also for aerobatics, designed in 1928 by A. Grzędzielewski and August Bobek-Zdaniewski at the PWS factory.

The design shared similar parts, including fuselage and engine, as a high-wing trainer fighter plane PWS-11, developed at the same time.

The PWS-14s, officially marked as PWS-12s, were used by the Polish Air Force from 1933 in the Officer Training Centre in Dęblin and a Flying School in Grudziądz.

In March 1931 it was used in a trip to Estonia, and in April 1933 - to Romania, Bulgaria, Yugoslavia, Austria and Czechoslovakia.

Then, both prototypes were used for several years as utility aircraft in Aviation Technical Research Institute (ITBL).