STEP File Viewer
View & Explore STEP models
Free · In‑App Purchases
Visualize STEP models from every angle with projected, section, and exploded views—even on your iPhone.
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 IGES/IGS models.
• Parse and load STEP models as assemblies (requires the model to include assembly data).
• Apply axis-aligned section planes (XY, XZ, YZ) to reveal the model’s internal geometry.
• Explode model components to inspect each part clearly in expanded space.
• 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 every feature. One subscription covers all versions—macOS, iPhone, and iPad.
• Purchase individually: Unlock only the features you need with a one-time payment (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.txt
• 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.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
- Supports loading IGES/IGS models.
- Supports parsing and loading STEP models as assemblies (the model must contain assembly information).
- Supports exploding model components, spreading them apart for detailed inspection.
The developer, 维 艾, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 维 艾
- Size
- 25.3 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 12.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Exploded View $2.99
- IGES/STEP Model Import $0.99
- Cross Section View $2.99
- Export as USDZ $0.99
- Export all formats $9.99
- Export as PNG $0.00
- Export as STL $1.99
- Export as GLTF/GLB $1.99
- Export as OBJ $1.99
- Projection view generation & export $1.99
- Copyright
- © 2025 aiwei
