Online 3D CAD & STEP File Viewer & DFM Inspector

Inspect 3D CAD files (.STEP, .STP, .IGES, .STL) directly in your browser. 100% private client-side parsing, envelope dimensions, surface area, and alloy weight.

Confidentiality & Security Guaranteed: Your CAD files are processed entirely in your web browser. Your files are only sent to us (securely) if you request a quote.

1. 3D CAD Model & Interactive Viewport

Drop your 3D CAD file here

Supports .STEP, .STP, .IGES, .IGS, and .STL (up to 50 MB)

Choose CAD File

Or inspect a sample component from our factory:

2. 3D Geometry & Feasibility Inspector

0 Facets

Estimated Unit Weight

0.00 g

1.4310 Stainless Steel (7.90 g/cm³)

Evaluate Material & Density:

Envelope Dimensions (L × W × H)

0.00 × 0.00

Height (Z): 0.00 mm

Envelope Diagonal

0.00 mm Bounding envelope

Solid Volume

0.00 cm³ 0 mm³

Total Surface Area

0.00 dm² 0 cm²

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CAD File Included with Quote Request Your 3D CAD model will be attached and sent directly to Filame’s engineering team with your technical quote request.

Calculated metrics (volume, surface area, weight) are derived from the 3D model tessellation and certified alloy densities.

DFM & CAD Inspection Guide

How to Verify 3D CAD Geometry Before Industrial Manufacturing

Before releasing precision sheet metal brackets, stamped clips, or mechanical springs to tooling and production, technical buyers and design engineers must verify key geometric metrics. Checking overall bounding box envelopes, surface areas for electroplating, and raw material volume prevents costly prototype revisions.

Understanding STEP B-Rep vs. STL Polygon Meshes

ISO 10303

Industrial manufacturing requires mathematically exact boundary representation (B-Rep) solid models rather than approximated triangle meshes:

STEP / STP Solid Models

Preserves true mathematical cylinders, analytical planes, and parametric curves. Used directly for CNC laser cutting paths, punch-die clearance engineering, and spring tooling cam design.

STL Triangulated Meshes

Decomposes every surface into flat planar facets. While suitable for rapid 3D printing visualization, curved holes become polyhedral facets, requiring conversion back to solid geometry for high-tolerance CNC stamping or machining.

Surface Area & Plating Estimation

FINISHING

Total surface area (expressed in square decimeters, dm²) is the decisive cost metric for protective surface treatments such as zinc electroplating (CrIII passivated), nickel plating, cataphoretic e-coating, and black oxide. Sizing bath immersion time and chemical deposit thickness depends directly on total exposed surface area.

Questions & Answers

01 Is my 3D CAD file kept confidential when using this online viewer ?

Yes, 100%. Unlike typical online converters, this tool runs entirely inside your web browser using WebAssembly (WASM). Your proprietary .STEP, .STP, .IGES, or .STL files are never transmitted to an external server or saved in the cloud, fulfilling strict non-disclosure agreements (NDAs) for aerospace, medical, and defense components.

02 Which 3D CAD file formats are supported for manufacturing inspection ?

The viewer supports standard ISO 10303 STEP solid models (.step, .stp, AP203, AP214, AP242), initial graphics exchange format (.iges, .igs), and stereolithography polygon meshes (.stl) up to 50 MB, suitable for inspecting stamped sheet metal parts, laser-cut profiles, and custom springs.

03 How does the tool calculate unit weight and raw material volume ?

The analyzer tessellates the 3D solid boundary representation (B-Rep) and computes exact closed volume using divergence theorem signed tetrahedrons. It then applies certified mass densities for engineering metals—including 1.4310 stainless steel (7.90 g/cm³), carbon spring steel (7.85 g/cm³), and aluminum 6060 (2.70 g/cm³)—to estimate part weight.

04 Can I transfer CAD dimensions directly into a Filame manufacturing quote ?

Yes. Clicking 'Request Manufacturing Quote for This Part' transfers the measured bounding box envelope, total surface area, solid volume, and selected alloy directly into Filame's technical quotation system, eliminating manual data entry and speeding up engineering feasibility review.

05 What manufacturing capabilities does Filame provide for custom 3D parts ?

Filame provides end-to-end industrial manufacturing including high-speed progressive stamping (10 T to 320 T), heavy hydraulic forming up to 7,000 T, multi-axis CNC air bending (230 T / 3,000 mm), fiber laser cutting, and spring & wire coiling from 0.1 mm to 20 mm wire diameter.

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