His approach relied on a soft, diffused light that defined the contours of his subjects without harsh shadows. He frequently used his family members as models, creating a sense of familiarity in works like the "Portret Marie-Lambertine Coclers, bij bladvituur". His etchings and drawings show a preference for psychological presence. He avoided the heavy ornamentation of the Rococo period. Instead, he chose a restrained Neoclassical clarity that prioritised the human form.

Modern collectors value Coclers for his ability to capture stillness. His portraits, such as "Portret van een vrouw, zittend bij het raam, de vinger aan de lippen", feel immediate and personal. The lack of excessive decorative elements makes his prints suitable for contemporary interiors. These works offer a window into eighteenth-century domesticity through a lens of technical precision. His compositions remain balanced and calm, providing a sense of order that translates well to paper prints.