Unravel3D is where 3D engineering models start talking. Import native CAD, run analysis, validate manufacturability, and check assemblies, all in a browser, with no installs.
Most browser 3D tools stop at rendering. Unravel3D understands the geometry beneath the surface, and turns that into decisions you can ship.
STEP, IGES, USD, GLB are read with OpenCASCADE so the original B-rep, face IDs, and assembly structure are preserved, not flattened.
Wall thickness, stress concentration, curvature, visualized as per-face heatmaps that catch design risks before they hit prototyping.
Tetrahedral meshing with gmsh, solved by CalculiX, animated displacement and stress fields in the same viewport.
Draft, undercut, overhang, and machining-access analysis flags manufacturability problems while the design is still cheap to change.
Interference detection, exploded views, and disassembly sequencing built on exact boolean geometry, not bounding-box approximations.
Export back to STEP / IGES carrying the original B-rep solid plus the analysis features you added. Downstream CAD opens a parametric model, not a triangle soup.
From CAD import through analysis to exportable insight, the journey happens in a single browser session.
Drop a STEP or IGES file. The model loads with its native B-rep, BREP face IDs intact, ready for interrogation, not collapsed into anonymous triangles.
Run thickness, stress-risk, curvature, and full linear-static FEA, visualized as heatmaps and animated deformation overlays directly on the part you're holding in the viewport.
Export to STEP or IGES carrying the original solid plus the features you added: measurements, paths, validated regions. Receivers open a true CAD model with the engineering context baked in.