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Tools/File viewers/3D Model Viewer

STL / OBJ / 3MF / GLB 3D Viewer

Preview 3D printing and general models with dimensions, vertices, and triangle counts.

Recommended tutorials

How to use STL / OBJ / 3MF / GLB 3D Viewer: a practical step-by-step guideSTL / OBJ / 3MF / GLB 3D Viewer troubleshooting: formats, blank results, and compatibility
Private local workspace
The selected file stays on this device
STL · OBJ · 3MF · GLB · GLTF≤ 100 MB

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.

  1. Drop a supported 3D model.
  2. Wait for it to load and center automatically.
  3. 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.