A STYKZ file is a stick figure animation created with Stykz. It contains lines, shapes, and a timeline of animation frames.

Stykz is a multiplatform animation program for creating stick figure animations. It is similar to Pivot StickFigure Animator, but includes extra features. Objects within a Stykz animation can be rotated, flipped, scaled, colorized, and duplicated. The animations are frame-based, meaning each frame can be edited individually. They can be exported as a QuickTime movie or an animated .GIF file.