Batch Convert STEP, IGES, STL, OBJ & 15+ 3D Formats
Convert entire folders between STEP, IGES, STL, OBJ, 3MF, glTF, and more. Mesh repair, unit conversion, tessellation control, and assembly support. Desktop alternative to CAD Exchanger — one-time purchase, no $590/year subscription. Powered by OpenCascade.
All the 3D Formats You Need
Convert between STEP (AP203, AP214, AP242), IGES, STL (ASCII & binary), OBJ (with MTL), 3MF, VRML, DXF (3D), PLY, BREP, glTF/GLB, FBX, Collada (DAE), AMF, X3D, and OFF.
Professional 3D Conversion Tools
Everything you need to convert, repair, and prepare 3D models for manufacturing, printing, visualization, and archival — in batch.
Batch Format Conversion
Convert entire folders between any supported format. STEP to STL for 3D printing, IGES to STEP for CAD exchange, OBJ to 3MF for additive manufacturing. Drag-and-drop folders, set output format, click Convert. File naming templates with variables ({filename}, {format}, {date}).
Mesh Repair & Optimization
Automatic mesh healing fixes non-manifold edges, self-intersections, degenerate faces, and open holes. Reduce polygon count while preserving shape accuracy. Remove duplicate vertices and unreferenced geometry. Essential for preparing models for 3D printing — catch errors before they waste filament and machine time.
Unit & Coordinate System Conversion
Convert between mm, cm, inches, meters, and feet automatically during import. Fix axis orientation mismatches (Y-up to Z-up, left-hand to right-hand). Critical for multi-vendor CAD exchange where one team uses millimeters and another uses inches — a single wrong unit can ruin a $50,000 CNC run.
3D Preview & Inspection
Built-in 3D viewer with GPU-accelerated rendering. Inspect models before and after conversion. Wireframe, solid, and X-ray display modes. Measure distances, angles, and bounding boxes. Verify conversion quality without opening your CAD software.
Tessellation Control
Fine-tune STEP/IGES to mesh conversion with adjustable chord deviation, angular deflection, and maximum edge length. Preview tessellation quality in real-time. Low-poly output for web/game assets, high-poly for precision manufacturing. Quality presets: Draft, Standard, Fine, Ultra.
Metadata & Property Preservation
Preserve part names, colors, materials, and assembly structure during conversion. Extract metadata to CSV/JSON for BOM (Bill of Materials) generation. STEP AP214 product data, IGES entity labels, and STL solid names are all preserved where formats support them.
CLI & Automation
Full command-line interface for scripting batch conversions. Watched folder mode monitors an input directory and auto-converts incoming files. Profile files store conversion presets. JSON output for pipeline integration. Exit codes for CI/CD. Perfect for automated manufacturing workflows.
Assembly Support
Convert multi-part STEP and IGES assemblies preserving the part hierarchy. Export as a single merged mesh or individual parts in separate files. Assembly tree visualization shows all components with their transformations. Supports nested assemblies and external references.
Built-In Workflows for Every Industry
Pre-configured conversion pipelines tuned for specific industries and use cases. One click, production-ready output.
3D Printing / Additive Manufacturing
STEP/IGES to STL/3MF with mesh repair and unit conversion (mm). Process entire job queues in batch. Tessellation presets from Draft to Ultra Fine for optimal print quality.
CNC & Manufacturing
STEP/IGES to STL/OBJ/STEP with unit conversion and coordinate system alignment. Mesh repair ensures clean geometry for CNC workflows. Batch convert entire project folders.
Multi-Vendor CAD Exchange
Convert between vendor-neutral formats (STEP AP203/AP214) and native mesh formats. Fix unit mismatches, axis orientation, and assembly structure. Eliminate file-translation bottlenecks between engineering teams.
Web & Real-Time 3D
STEP/OBJ to glTF/GLB with tessellation control for web and game engines. Prepare CAD models for web configurators, AR experiences, and real-time 3D. Batch pipeline with CLI automation.
Archival & Documentation
Convert legacy formats to modern standards. IGES to STEP AP242 for long-term archival. Batch convert entire file libraries with consistent settings and naming conventions.
How 3D CAD Converter Compares
See how we stack up against CAD Exchanger, TransMagic, and Glovius.
| Feature | CAD Exchanger ($590/yr) | TransMagic ($2,000+) | Glovius (subscription) | 3D CAD Converter |
|---|---|---|---|---|
| Batch conversion | Limited | ✔ | ✘ | ✔ |
| Mesh repair | ✔ | ✔ | ✘ | ✔ |
| Unit conversion | ✔ | ✔ | ✘ | ✔ |
| 3D preview | ✔ | ✔ | ✔ | ✔ |
| CLI automation | ✔ | ✘ | ✘ | ✔ |
| Tessellation control | ✔ | Limited | ✘ | ✔ |
| Assembly support | ✔ | ✔ | ✔ | ✔ |
| Fully offline | ✔ | ✔ | ✔ | ✔ |
| Cost | $590/yr | $2,000+ | Subscription | One-time |
How It Works
Add Your Files
Drop 3D files or entire folders. 3D CAD Converter reads STEP, IGES, STL, OBJ, 3MF, glTF, and 15+ formats.
Configure
Choose output format, tessellation quality, unit system, and mesh repair options. Save presets for repeated jobs. Chain multiple operations in a pipeline.
Convert
Hit Start. Batch processing handles entire folders with per-file progress and ETA. Export individual parts or merged assemblies.
CLI & MCP Server
スクリプト、CI/CDパイプライン、またはAIエージェントから3Dフォーマット変換を自動化。CLIとMCPサーバーはすべてのライセンスに含まれています。
CLIコマンド
| コマンド | 説明 |
|---|---|
cadconvert convert | フォーマット、品質、単位、修復オプションを指定して単一の3Dファイルを変換 |
cadconvert batch | 並列処理とフォーマット選択でディレクトリをバッチ変換 |
cadconvert info | 3Dファイルを検査 — フォーマット、頂点/面数、バウンディングボックス、単位、アセンブリ構造 |
cadconvert formats | サポートされているすべての入出力フォーマットを一覧表示 |
cadconvert watch | フォルダを監視し、新しいファイルが到着したら自動変換 |
cadconvert register | ライセンスキーを有効化 |
cadconvert serve | AIエージェント統合用のMCPサーバーを起動（stdioトランスポート） |
# STEPをSTLに精密テセレーションで変換 cadconvert convert model.step --format stl --quality fine # メッシュ修復と単位変換でバッチ変換 cadconvert batch ./models --format obj --repair --units mm # 3Dファイルを検査 cadconvert info assembly.step --json # フォルダの新しいファイルを監視 cadconvert watch ./incoming --format 3mf -o ./converted
MCP Server — AIエージェント統合
cadconvert serveを実行してModel Context Protocolサーバーを起動します。ClaudeなどのAIエージェントが自然言語で3Dファイルを変換、検査、クエリできるようになります。
| MCPツール | 説明 |
|---|---|
convert_cad | 品質、単位、修復オプションを使用して、サポートされているすべてのフォーマット間で3Dファイルを変換 |
get_file_info | 詳細なファイル情報を取得 — フォーマット、頂点、面、バウンディングボックス、単位、アセンブリツリー |
detect_format | 完全な解析なしで3Dファイルのフォーマットを検出 |
list_formats | 機能付きのサポートされているすべての入出力フォーマットを一覧表示 |
// claude_desktop_config.json
{
"mcpServers": {
"cadconvert": {
"command": "cadconvert",
"args": ["serve"]
}
}
}
Claude Code Agent Skills
CAD変換スキルをインストールして、Claude Codeから直接CLIを使用できるようにします。英語でやりたいことを説明してください — Claudeはすべてのコマンド、フォーマット、オプションを把握しています。
# スキルをインストール
claude skill install github:brunojanvier77/ContentaSoft/skills/contenta-cad
インストール後、Claudeに依頼: "Convert all STEP files in D:\CAD to STL with fine tessellation and mm units"
What Engineers Say
Replaced our $590/year CAD Exchanger subscription. Same OpenCascade kernel, same quality, paid for itself in three weeks.
Batches our entire STEP library to STL for printing. The CLI slots right into our overnight build pipeline.
Handles 1 GB+ assemblies without choking. The 3D preview alone saved me from opening a dozen broken files.
Frequently Asked Questions
Yes. 3D CAD Converter provides the same core functionality — batch conversion between STEP, IGES, STL, OBJ, and 15+ formats with mesh repair, tessellation control, and assembly support — as a one-time purchase instead of CAD Exchanger's $590/year subscription.
STEP (AP203, AP214, AP242), IGES, STL (ASCII & binary), OBJ (with MTL materials), 3MF, VRML, DXF (3D), PLY, BREP, glTF/GLB, FBX, Collada (DAE), AMF, X3D, and OFF.
Yes — automatic mesh healing fixes non-manifold edges, self-intersections, degenerate faces, open holes, and duplicate vertices. Essential for preparing models for 3D printing.
Yes — multi-part STEP and IGES assemblies are converted with full part hierarchy preserved. You can export as a single merged mesh or as individual parts in separate files.
Yes — auto-converts between mm, cm, inches, meters, and feet. Also fixes axis orientation mismatches (Y-up to Z-up, left-hand to right-hand coordinate systems).
No — 3D CAD Converter is fully standalone. No AutoCAD, SolidWorks, Fusion 360, or other CAD license is needed. It includes its own 3D viewer for inspecting models.
Yes — full command-line interface for scripting batch conversions. Watched folder mode auto-converts incoming files. Profile files store conversion presets. JSON output and exit codes for CI/CD pipeline integration.
Yes — 100% offline. No cloud processing, no internet connection required, no file uploads. Your intellectual property stays on your machine.
One-time purchase — no subscription. All features are included. Sign up to be notified when we launch and get early-bird pricing.