Open3D: STEP GLB STL 3D Viewer

Open STEP, STL, GLB, OBJ, FBX, DXF and 7 more 3D file formats instantly on Android. View in AR, check STL files for 3D printing, and share screenshots — no account, no cloud upload. Your files never leave your phone.

STEP viewer. STL viewer. GLB viewer. OBJ viewer. FBX viewer. DXF viewer. 3MF viewer. USDZ viewer. All in one 3D model viewer app.

Looking for a STEP viewer for Android without installing Fusion 360? An STL viewer that just opens the file? A GLB viewer that doesn't ask you to register? Open3D Viewer opens STEP, STL, GLB, OBJ and ten other 3D file formats instantly. Tap a file in Gmail, Drive, Downloads or any file manager and pick Open3D — the model loads in seconds.

THE 3D FILE FORMATS OPEN3D VIEWER OPENS
CAD formats: STEP / STP, IGES / IGS, DXF
Mesh formats: STL, GLB, GLTF, OBJ, PLY, 3MF, FBX, DAE, 3DS, USDZ

Export & convert
Turn OBJ, PLY, 3MF, FBX, DAE, 3DS and more into STL for 3D printing or
GLB for sharing. Files save straight to your Downloads folder — no
extra apps, no online converter, everything happens on-device.

One app covers STEP viewer, STL viewer, GLB viewer, OBJ viewer, FBX viewer and DXF viewer on Android.

STEP VIEWER AND CAD VIEWER
CAD files like STEP, IGES and DXF used to need AutoCAD, Fusion 360 or SolidWorks. Open3D Viewer is a STEP viewer and DXF viewer for Android — open a .stp, .step, .igs or .dxf attachment on your phone in seconds. The geometry tessellates to a mesh so you can rotate, zoom and inspect on the go, without a CAD subscription.

WHO USES OPEN3D VIEWER
CAD engineers open STEP and DXF files from Fusion 360, SolidWorks, AutoCAD or FreeCAD on their phone without a paid seat. 3D printing hobbyists check STL and 3MF files before slicing in Bambu Studio, PrusaSlicer, OrcaSlicer or Cura. 3D artists preview GLB, OBJ, FBX and DAE files from Blender, Sketchfab or Maya without booting a laptop. AR enthusiasts drop USDZ and GLB models into their living room.

A 3D VIEWER THAT DOES THE BASICS RIGHT
• Open files from your file manager, email, downloads, or any "Open with" menu
• Smooth orbit, pan and zoom touch controls
• Render modes: solid, wireframe, X-ray, textured, matte
• Wireframe overlay on top of the rendered surface
• Preset camera views (front, side, top, perspective)
• Light and dark themes
• 5 background colours and 6 HDRI lighting environments
• Play built-in animations on GLB and FBX models
• View 3D models in AR, placed in your real room (where supported)
• Capture a screenshot or rotating GIF and share it
• Recent files with auto-generated thumbnails
• Full model specs: triangle count, vertices, materials, textures, bounding box

BUILT FOR 3D PRINTING
A maker-focused STL viewer for Android. Drop in an STL or 3MF from Thingiverse, Printables or MakerWorld and check:
• Print-readiness: manifold / watertight detection, overhangs, wall thickness
• Bed-fit for popular printers (Bambu A1, Prusa MK4, Ender 3, Bambu X1C)
• Rough weight, filament length and cost estimates
• Distance measurement directly on the model
• Cross-section / clipping plane to inspect interiors
• Scale and resize before slicing
• Convert and export between GLB and STL

LOCALIZED
Available in English, German, Spanish, French, Portuguese, Hindi, Japanese and Chinese.

NO ACCOUNT. NO CLOUD. NO NONSENSE.
• No sign-up, ever
• 100% on-device. Works offline.
• We never read, scan or upload your 3D files
• We don't track which files you open

The STEP viewer, STL viewer and GLB viewer that engineers, makers and 3D artists actually want: clean, fast, and local.

Measurements and print-readiness figures are estimates, not a replacement for a slicer or proper measuring tools.

Open3D Viewer is not affiliated with the Open3D open-source library at open3d.org. All trademarks belong to their respective owners.

Privacy: https://open3d.app/privacy.html