STEP File Viewer

STEP File Viewer

View & Explore STEP/IGES

4 ratings
8 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 8, 2025
  • September 18, 2026

Features

STEP File Viewer video #1 for iPhone
STEP File Viewer screenshot #2 for iPhone
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STEP File Viewer screenshot #7 for iPhone
STEP File Viewer screenshot #8 for iPhone
iphone
ipad
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About

View and interact with 3D CAD files like STEP and IGES. Inspect internal geometry, measure dimensions, and export models in various formats. Ideal for engineers, designers, and students needing to visualize complex designs without expensive software.

✓3D model viewing with pan, zoom, and rotate
✓Solid, shaded, and wireframe display modes
✓Measure dimensions and features
✓Section planes for internal geometry inspection
✓Export models to STL, OBJ, glTF, and more
✓Supports assembly data and PMI annotations
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What's New in STEP File Viewer

1.1.0

September 18, 2026

STEP File Viewer 1.1.0 brings a redesigned interface: viewing, measuring, reviewing and exporting STEP / STP / IGES 3D models on iPhone, iPad and Mac is now smoother. Redesigned interface • A two-row toolbar; on larger screens the main tools are labeled: Open, Notes, Measure, Section, Explode, 2D views, Export • Improved Dark Mode: menus, the sidebar and dialogs follow the system appearance; alerts now use the app's own style • The start screen opens a model or a recent file directly, and loading shows clear progress • Section, Explode, 2D views and other modes show their status at the bottom; tap × or press Esc to leave them • The top menu bar stays visible, and Share, Guide and more now live in the More menu; features that need unlocking are marked PRO Fixes and refinements • Exporting to STL, OBJ, glTF, GLB or USDZ restores the complete solid model first: section cuts, 2D views, exploded layouts and measurement markers no longer end up in the file, so exports open correctly in other apps • Export and import Review Notes backups to move notes between iPhone, iPad and Mac; an import previews the changes first, and an older backup never overwrites newer edits (unlocked together with review report export) • Mac: opening a model from recent files works again, and clicking empty space clears the selection; keyboard shortcuts include ⌘O to open, G to toggle the grid and D for model details • The Measure, Review Notes and exploded-parts panels no longer overlap • Point to Point and Point to Plane measurements no longer create 0-distance records

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Subscription plans

Pro Light

A one-month lightweight subscription.

$4.991 Month
How to cancel STEP File Viewer subscription ⁉️
7

In-App Purchases

$4.99

Projection view generation & export

Generate and export the model’s projection view.

User reviews

Not free/total scam

Not free/ can’t load files an view for free

Response from developer

Load and view an unlimited number of STEP models for free. Advanced features—such as exploded views, cross-sections, and format conversion or export—require payment to unlock. You can choose to permanently unlock specific features individually or subscribe for unlimited access to all features.

Great Software and software support

They have fixed bugs, instant response from developers, and support team.

Response from developer

Thank you for your valuable feedback! We are pleased to inform you that most of your concerns have been addressed in our latest update (v1.0.11): 1, STEP/STP Export: You can now export parts in STEP (faceted) format. 2, Exploded View Control: We have added a radius setting to the exploded view, giving you precise control over the distance between objects. 3, Component visibility control is fully supported. You can easily hide unwanted parts by using the model structure tree nodes under "Model" in the sidebar. This will allow you to inspect the components hidden behind them. 4, Regarding STL support: The core design and focus of this app is strictly dedicated to the high-fidelity loading and parsing of STEP models. Because STL files handle data quite differently (mesh vs. boundary representation), adding STL parsing is currently not aligned with our focus on optimizing the STEP model experience. We highly recommend updating to v1.0.11 to try out these new features. Thank you for helping us improve!

卡顿

放大缩小 放着放着不见了 旋转也卡的很 翻不动

Response from developer

屏幕左下方快捷按钮,第一排倒数第二个是重置按钮-专们用来解决缩放后看不到的,有使用么? 1.0.9版本(已于6月3日发布上线)对操作卡顿的现象进行了一轮优化。欢迎再次使用、反馈,任何建议随时可以发到开发者邮箱 danjian42@gmail.com 感谢您的反馈:)

一般看图足够了

一般看图足够了

good for checking out the model

recommended

Response from developer

Thanks.

Developer apps

FAQ

What is STEP File Viewer?

STEP File Viewer is a tool for macOS, iPad, and iPhone that allows you to view and interact with 3D CAD files in STEP and IGES formats. It offers features like measurement, sectioning, and export to other common 3D formats.

Does STEP File Viewer have ads?

No, STEP File Viewer is ad-free. The developer explicitly states 'No ads. No tracking. No data collection.' for a clean user experience.

What devices does STEP File Viewer support?

STEP File Viewer is available on macOS, iPhone, and iPad. A single subscription covers all supported Apple devices.

How much does STEP File Viewer cost?

The app offers a free tier for loading and viewing unlimited STEP models. Additional features are available through individual unlocks or a subscription, with pricing details provided in the app.

Can I measure dimensions with STEP File Viewer?

Yes, STEP File Viewer allows you to measure auto-detected hole features, bounding box dimensions, point-to-point distances, diameter/radius, and angles to verify key dimensions.

What file formats can I export from STEP File Viewer?

You can export your 3D models from STEP File Viewer in STL, OBJ, glTF, GLB, or USDZ formats. This allows for further use in other applications or sharing.

How often is STEP File Viewer updated?

The latest version of STEP File Viewer is 1.0.10, and it was last updated on June 14, 2026. This indicates a recent update, suggesting ongoing development and support.

What are the subscription options for STEP File Viewer?

STEP File Viewer offers a 'Pro Flex' subscription at $1.99 per 7 days with a 3-day free trial, and a 'Pro Infinity' subscription at $19.99 per year. Subscriptions auto-renew unless turned off 24 hours prior to the end of the current period.