STL Viewer guides
Step-by-step guides to every STL Viewer feature: opening files, view modes, model info, filament, measuring, sections, scaling and comparing.
How to open STL, OBJ, 3MF and PLY files on Android
Open 3D print files in STL Viewer from the file picker, Open with, the share menu or a ZIP, add OBJ colors from the MTL file and handle large models.
How to use view modes and gestures in STL Viewer
Rotate, pan and zoom a 3D model with touch gestures, switch between solid, wireframe and x-ray, and show the print bed grid, axes and file colors.
How to check a 3D model's size and volume
Use Model info in STL Viewer to see width, depth and height, volume, surface area, triangles and whether the mesh is watertight, in mm or inches.
How to estimate filament for a 3D print
Estimate the weight and length of PLA, PETG, ABS or TPU for a model in STL Viewer, with 1.75 or 2.85 mm filament and your own infill, before you print.
How to measure a 3D model in STL Viewer
Tap two points on a 3D model to get the distance and the X, Y and Z differences in mm or inches. Premium tool, with one free try after a short ad.
How to see inside a 3D model with Section
Cut a 3D model along X, Y or Z in STL Viewer, slide the plane through it and read the section's width, height and area to check walls and cavities.
How to scale a 3D model and export it as STL
Scale a model by percent or to a target size in STL Viewer, convert inches to millimeters and save the result as a new binary STL for your slicer.
How to compare two 3D models side by side
Open a second model next to the first in STL Viewer and compare width, depth, height, volume and triangle count, with the difference for each value.
Check your next print on your phone
Free STL, OBJ, 3MF and PLY viewer for Android. Works offline.