STEP File Viewer

View & Explore STEP/IGES

Free · In‑App Purchases

Lightweight, offline, ready to use, no login. Measure dimensions and angles, review AP242 PMI, and inspect via projected, section, and exploded views, even on 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. • 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.

  • 4.0
    out of 5
    4 Ratings

- Improved model zoom control for smoother mouse wheel and trackpad zooming, making view adjustments more precise. - Improved the recent files list with quick filename filtering and a clearer Clear All action. - Improved STEP file compatibility, fixing some models that failed to load or showed abnormal faces and holes.

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

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

    Seller
    • 维 艾
    Size
    • 33.5 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 and 4 more
    • English, French, German, Japanese, Simplified Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    • Pro Flex $1.99
    • Export as PNG $2.99
    • IGES/STEP Model Import $3.99
    • Export as OBJ $3.99
    • Export as STL $3.99
    • Pro Light $4.99
    • Pro Infinity $19.99
    • Exploded View $4.99
    • Export all formats $15.99
    • Cross Section View $4.99
    Copyright
    • © 2025-2026 aiwei