Open3D vs View3D Pro

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

View3D Pro — Open, Inspect, and Share 3D Models — Fully Offline, Private & Blazing Fast View3D Pro is a professional-grade 3D model viewer built for creators, engineers, students, and makers. Open STL, OBJ, GLB, and GLTF files instantly — no cloud, no account, no compromise. [100% Offline & Private] • Works entirely on your device — zero internet connection required. • Your models never leave your device. No servers, no telemetry, no tracking. • No account sign-up. Just open, view, and go. • All files are stored securely in the app's sandbox and are completely erased when you uninstall the app. [Fast & Smooth Rendering] • Optimized native engine opens files in seconds, even large models. • High-fidelity rendering with accurate lighting, materials, and textures. • Smooth 3D rotation, zoom, and pan — respond instantly to a single finger. • Your data stays local, so performance stays fast whether you're online or on a plane. [Professional Toolsets] • Precision one-tap 3D inspect: rotate, orbit, zoom, and pan with intuitive gestures. • Clear wireframe & solid view modes for engineering review and 3D printing checks. • Open models directly from Files, AirDrop, Mail, Safari, or any sharing app. • Keeps your recently opened models one tap away for quick reload. • A curated library of sample models to test every feature right away. [Universal 3D Format Support] • STL, OBJ, GLB, and GLTF — the standard file types for 3D printing, CAD, game, and AR workflows. • Smart format detection reads the actual file content, so mislabeled files still open correctly. • Dark mode and light mode that follow your system appearance. • Multi-language support for a global audience. [Why View3D Pro?] • Private by design: your files stay yours. Perfect for confidential or pre-release designs. • Always available: no network, no subscription, no waiting — your viewer is always on. • Professional quality: built with the same rendering technology trusted by engineers and designers. • Respects your device: lightweight, no account, no background data usage. Whether you're reviewing a CAD export, checking a print-ready STL, presenting a GLB concept, or sharing a model with a teammate, View3D Pro gives you a fast, secure, and professional 3D viewing experience — entirely offline. Download now and bring professional 3D viewing to your pocket. View3D Pro requires no permissions beyond opening files you choose. Your data never leaves your device.