The patented Nanoconverter is as planar flexure-based structure that attenuates linear movement amplitudes by a large constant reduction factor that can be chosen by design typically between 20 and 1000. It allows using conventional commercial actuators with micrometric accuracy to produce movements with nanometric accuracy. The first Nanoconverter is in use on the Differential-Phase-Contrast Interferometer of a Synchrotron Radiation Beamline. A wide spectrum of other applications is envisaged.