STEP File Viewer

STEP File Viewer is a lightweight yet powerful tool for viewing .step and .stp files on macOS, iPad, and iPhone.

Key Features
• View STEP models in 3D with rotate, pan, and zoom controls using perspective projection.
• Display 3D models in solid, shaded, or wireframe modes.
• Load and view IGES/IGS models.
• Supports assembly-level colors and exploded views (requires the model to include assembly data).
• Parse and load STEP models as assemblies
• Support PMI annotations, dimension details, and model information panels in AP242 models for easier design review.
• Measure auto-detected hole features, bounding box dimensions, point-to-point distances, diameter/radius, and angles to verify key dimensions more quickly.
• Apply axis-aligned section planes (XY, XZ, YZ) to reveal the model’s internal geometry.
• Explode model components to inspect the parts clearly in expanded space, with the ability to export selected parts as separate files.
• Export 3D models in STL, OBJ, glTF, GLB, or USDZ formats for further use or sharing.
• Capture high-quality viewport screenshots for easy sharing.
• No ads. No tracking. No data collection. Just a clean, efficient tool built for productivity.

The STEP format (ISO 10303) is widely supported by 3D CAD, CAM, CAE, and PLM applications.

Recommended For:
• Engineers & Designers: Review designs on the shop floor or during client meetings.
• Machinists & CNC Operators: Quickly verify part geometry before production.
• 3D Printing Enthusiasts: Easily convert professional STEP files to STL for slicing.
• Students & Educators: Visualize complex structures without expensive CAD licenses.

Pricing & Access
• Free: Load and view unlimited STEP models.
• Subscription: Unlimited access to all features. A single subscription covers macOS, iPhone, and iPad.
• Individual Unlocks: Get exactly what you need with one-time purchases for specific features—no subscription required.
• Payment is charged to your App Store account.
• Auto-renews unless turned off at least 24 hours before the current period ends.
• Manage your subscriptions in the App Store settings.


Privacy & Purchase Terms
• Privacy Policy: https://h53d.github.io/step/policy.html
• Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/


Have questions or need support? Reach out to danjian42@gmail.com.