Online 3D Viewer review
A free, open-source web viewer with broad format support and practical inspection tools.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Online 3D Viewer is a free, open-source web application for viewing and exploring 3D models in a browser. It is aimed at developers and technical users who need a straightforward web viewer rather than a broader design review or presentation workspace. Models can be loaded from local files, by drag and drop, or from external URLs. Browser-based access keeps the product focused on viewing without requiring a desktop platform, and its public sharing model suits externally hosted assets.
Format coverage is a central strength. The viewer supports 3dm, 3ds, 3mf, amf, bim, brep, dae, fbx, fcstd, gltf, ifc, iges, step, stl, obj, off, ply, and wrl files, spanning CAD, mesh, and 3D exchange workflows. Model and mesh inspection can help users examine loaded assets, while export in selected formats provides a path for moving models onward. Visualization settings include background color, edges, and default color, giving users basic control over how a model appears. Developers can also generate share links and embeddable viewer code for externally hosted models.
The product is a good fit when the priority is free, open-source browser viewing with broad file-format support and simple public access. Its limitations matter for teams that need formal review workflows: the published positioning does not include verified measurements, annotations, collaboration, or presentation tools. Sharing is also tied to externally hosted models, so local uploads do not become publicly available through the viewer. Choose Online 3D Viewer for lightweight inspection, format handling, and embedding; choose an alternative when measurement, markup, team review, or presentation capabilities are core requirements.
Online 3D Viewer pros and cons
- Where it wins
- Supports CAD, mesh, and exchange formats including STEP, STL, OBJ, and GLTF
- Loads local files, drag-and-drop uploads, and models from external URLs
- Provides inspection, export, visualization settings, public links, and embed code
- Where it doesn't
- No verified measurement tools are described
- No annotations, collaboration, or presentation tools are included
- Sharing requires models to be hosted on external servers
Online 3D Viewer fact sheet, pricing and score →
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