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  • STL 3D File Viewer screenshot 1
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About STL 3D File Viewer

Unlock the Power of 3D Design with CAD Viewer – The Ultimate 3D Model Professional Tool
CAD Viewer is a powerful, lightweight, and intuitive application designed for engineers, 3D printing enthusiasts, and designers. Whether you need to inspect a complex mechanical part or prepare a model for 3D printing, CAD Viewer provides a comprehensive suite of tools to view, analyze, and modify your 3D files on the go.
Supported Formats:
• STL (.stl) - Binary & ASCII
• OBJ (.obj) - Wavefront 3D
• DXF (.dxf) - Drawing Exchange Format
• GLTF / GLB (.gltf, .glb) - Graphics Language Transmission Format

Advanced 3D Viewing Features:
• Multi-View Modes: Switch between Wireframe, Solid, X-Ray, and Transparent views.
• Smart Grids & Planes: Toggle background grids and section planes for internal inspection.
• Orthographic & Perspective: Choose between technical and realistic viewing angles.
• Custom Lighting: Toggle multi-light setups and gradient backgrounds for better visualization.
• Distance & Angle: Measure precisely between vertices and faces.
• Mesh Analysis: Check for watertightness, volume, surface area, and non-manifold edges.
• 3D Print Readiness: Instantly detect issues like degenerate triangles or inverted normals.
• Mesh Repair: Recalculate or flip normals and remove degenerate triangles.
• Decimation: Reduce triangle count (Poly-reduction) to optimize models.
• Boolean Operations: Perform Union, Subtraction, and Intersection between models.
• Scaling: Uniform and non-uniform scaling in mm, cm, m, inches, or feet.
Convert, Export & Share:
• Format Converter: Convert models between STL and OBJ formats.
• PDF Reports: Export professional PDF datasheets including snapshots and model specs.
• Screenshots: Capture high-resolution renders and share them instantly.
• Annotations: Add 3D notes directly onto model vertices for collaborative feedback.
• Privacy & Security: CAD Viewer respects your privacy. All file processing happens locally on your device; your models are never uploaded to our servers.

Download STL 3D File Viewer today and take your 3D workflow to the next level!

What’s new

Version 1.5.4 · Updated October 4, 2026

Bug fixes and improvement

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