Open3D vs MeshVault

Open3D Viewer is the fastest free 3D model viewer for STL, GLB, OBJ, FBX, STEP, DXF, USDZ, PLY, 3MF, GLTF, IGES, DAE and 3DS files. Open any 3D file in seconds, view it in AR with Apple Quick Look, and check it for 3D printing — no account, no sign-up, no cloud upload. Your files never leave your iPhone or iPad. Whether you're a 3D-printing hobbyist checking an STL before slicing, a 3D artist previewing a GLB or FBX, or a CAD user opening a STEP or DXF, Open3D Viewer opens it instantly — without the paywalls and login screens other 3D viewers force on you. SUPPORTED 3D FILE FORMATS • Mesh: STL, GLB, GLTF, OBJ, PLY, 3MF, FBX, DAE, 3DS, USDZ • CAD: STEP / STP, IGES / IGS, DXF 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. A 3D VIEWER THAT DOES THE BASICS RIGHT • Open files from Files, email, downloads, or any "Open with" menu • Smooth orbit, pan and zoom touch controls • Render modes: solid, wireframe, X-ray, textured, matte • Wireframe overlay — see the geometry on top of the rendered surface • Preset camera views (front, side, top, perspective) • Light and dark themes • 5 background colours + 6 HDRI lighting environments (studio, sunset, dawn, dusk, dark, white) • Play built-in animations • View 3D models in AR via Apple Quick Look (USDZ) • Capture a screenshot or a 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 • Print-readiness check: manifold / watertight detection, overhangs, wall thickness • Bed-fit check for popular printers (Bambu A1, Prusa MK4, Ender 3, Bambu X1C) • Rough weight, filament length and cost estimates • Measure distances on the model • Cross-section / clipping plane to inspect interiors • Scale and resize tool • Convert and export between GLB and STL LOCALIZED The interface automatically follows your device language. Currently 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 files • We don't track which files you open The STL viewer and GLB viewer that makers, 3D artists and engineers actually want: clean, fast, and local. Measurements and print-readiness figures are estimates, not a replacement for a slicer or proper measuring tools. See the in-app Disclaimer. Open3D Viewer is an independent app and is not affiliated with the Open3D open-source library at open3d.org. All trademarks belong to their respective owners. Privacy policy: https://open3d.app/privacy.html

Open a 3D file, look at it properly, and get the numbers you actually need. OPENS WHAT YOU ALREADY HAVE STL, OBJ, FBX, PLY, GLB/glTF, 3MF, USDZ, DAE and Alembic. Drop in a ZIP, 7z or tar.gz and the models inside open directly - no unzipping first. If an archive holds a whole assembly, tick the parts you want, or load all of them at once. BUILT FOR BIG FILES A 1.2 GB assembly with millions of triangles loads without falling over. When a model is larger than the device can hold at full precision, it is reduced automatically so you still get to see it, and a banner tells you exactly what happened. EXPLODED VIEW Drag the slider and the parts move outward from the centre - the assembly opens up like a workshop diagram. Drag it back and everything returns to where it was, exactly. Files loaded together from an archive separate part by part. MEASURE AND WEIGH Tap two points for a distance in mm, cm, m or inches. Pick a material - PLA, ABS, PETG, resin, nylon, aluminium, steel, stainless, brass, copper, titanium, gold, silver, wood or your own density - and get the weight, alongside volume, surface area, bounding box and triangle count. Volume comes from the full-precision mesh, so simplified display never changes the numbers. SEE IT THE WAY YOU WANT Front, back, left, right, top, bottom, isometric, and fit to view. Lighting follows the camera, so the underside is as clear as the top. Set the model colour, the background, the light direction and its strength. CONVERT BETWEEN FORMATS Export what you opened as STL, OBJ, PLY, GLB, 3MF, FBX or USDZ. Handy when a printer wants STL and the model arrived as FBX. ALSO A WORKING ARCHIVE TOOL Extract any ZIP, 7z or tar.gz, 3D file or not, and save the contents to Files. Compress files into a standard ZIP anyone can open. Everything runs on the device. Nothing is uploaded. One-time purchase removes ads, drops the watermark from exported images, and unlocks unlimited format conversion. Free without it: three conversions, plus one more each time you watch a short video, up to five a day. Not supported: RAR archives, and CAD formats such as STEP or IGES.