How to open STL, OBJ, 3MF, GLB, GLTF files online
STL and 3MF are common in 3D printing, while OBJ, GLB, and glTF are used for modeling and real-time graphics. This viewer provides one quick inspection interface.
- Drop a supported 3D model.
- Wait for it to load and center automatically.
- Orbit, zoom, and inspect dimensions and mesh counts.
Why use this viewer
- Popular printing and web formats
- Your file is read and processed only in this browser tab. It is never uploaded to FreeTool servers.
- Wireframe and visual inspection
Compatibility and limitations
- External textures may not load from a standalone OBJ or glTF file
- The viewer does not validate printability or watertightness
Frequently asked questions
Can it show STL dimensions?
Yes, it reports bounding-box dimensions; source units depend on the file convention.
Can it repair a model?
This version is a viewer and does not repair meshes.