Fourier Grid: Interactive 2D Fourier Transform

Draw in the spatial or frequency domain and see the forward or inverse Fourier transform. Four editable canvases show the real and imaginary parts of a complex signal, with independent magnitude and phase views.

Experiment with shapes, waves, Gaussian filters, noise, symmetry, and repeating patterns. The free playground runs in your browser, with live updates, undo and redo, and fullscreen controls.

A project from teuncm.nl.