STEP File Analyzer
Inspect boundary-representation topology, measure 3D dimensions, verify normals, and test manifold integrity.
CAD Conversion and Mesh Inspection Workbench
Drop .STEP or .STP files here
Single or Batch • 100% In-Browser Memory • Zero Uploads
Large CAD files (>50MB) are recommended for desktop workstations due to mobile browser memory limits.
Tessellation Parameters
📐 Deflection Tolerances(Draft: 0.5mm • Std: 0.1mm • Fine: 0.01mm)▼
Converting CAD Model
Initializing tessellation...
model.stl
READYReady for 3D slicing and CAD export
Batch Conversion Queue
Model Statistics
Mesh Quality & Health
PASSTopological integrity and normal orientation verification completed.
100% Client-Side Privacy
Your CAD geometry never leaves your workstation. OpenCASCADE executes entirely inside a browser-local WebAssembly sandbox.
Model Inspection
Inspect the exact tessellated mesh buffer in 3D before exporting. Toggle wireframe rendering, coordinate axes, and reference grid.
Mesh Validation
Detect zero-area degenerate triangles, duplicate facets, and non-manifold edges to prevent 3D printer slicing failures.
Dedicated CAD Tools
ISO 10303 StandardsContinue Workflow: Convert & Repair
Transition from topological CAD inspection to watertight manufacturing outputs.Tessellate standard .step CAD solids into clean, high-resolution binary STL files.
Full support for aerospace & industrial AP203/AP214/AP242 STP assemblies.
Auto-repair inverted facet normals, cull degenerate slivers, and make STL watertight.
Queue multiple CAD files and download converted STL models in a single ZIP archive.
Verify build plate envelope fits and optimize orientation for Bambu Studio, PrusaSlicer, and Cura.
Deep dive into mathematical B-Rep curves vs planar triangular facets for additive manufacturing.
B-Rep Diagnostics & Inspection FAQ
What does the STEP File Analyzer inspect?
The analyzer extracts exact topological B-Rep primitives (solids, faces, edges), calculates physical displacement properties (volume in cm³, surface area in cm², and 3D centroid), and runs manifold health checks (detecting boundary open edges, non-manifold edges, and inverted normals).
Is my CAD geometry processed confidentially?
Yes. All OpenCASCADE parsing, geometric calculus, and WebGL rendering are executed 100% inside your web browser's local sandbox memory. Zero bytes leave your machine.
Can I inspect internal hollow cavities and wall thickness?
Yes. Use the real-time Section Clipping Plane slider to cross-section your model along X, Y, or Z axes directly in the 3D WebGL viewport.