Fast STL Viewer


Fast STL Viewer is a high-performance offline 3D viewer for binary and ASCII STL files on Android devices. Includes convenient view orientations and rendering modes (shaded, wireframe, combined, and points). Allows opening multiple STL files on the same scene. Associates with STL files which could be opened directly from Gmail, Google Drive, Dropbox, and OneDrive.

Load big meshes Find separate meshes Find mesh boundaries Boundary test
Boundary test Load big models fast STL files list View mesh edges


  1. Open one or more STL files via the app's internal file browser or directly from an external app
  2. Press and hold your finger on a 3D model to select it
  3. Go to File --> 3D Print --> Upload --> Go to Treatstock
  4. Customize and finalize the order following the corresponding instructions on Treatstock website