STEP File Viewer

View & Explore STEP/IGES

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 and view 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 the parts 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 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.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

  • 1.0
    out of 5
    1 Ratings

- The user interface has been optimized to match the aesthetic of iOS and macOS 26. - Updated Privacy Policy and Support documents for better readability via web-based viewing. - Faster startup: Replaced blocking animations to enable instant, hands-free app launching.

Version 1.0.4

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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    • Seller
      • 维 艾
    • Size
      • 25.3 MB
    • Category
      • Productivity
    • 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+
    • In-App Purchases
      Yes
      • IGES/STEP Model Import $0.99
      • Export as OBJ $1.99
      • Export as STL $2.99
      • Export as PNG $0.99
      • Pro Flex $0.99
      • Exploded View $2.99
      • Cross Section View $2.99
      • Export as USDZ $0.99
      • Export all formats $9.99
      • Export as GLTF/GLB $1.99
      • Learn More
    • Copyright
      • © 2025-2026 aiwei
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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