STEP File Viewer

STEP File Viewer

View & Explore STEP/IGES

3 ratings
7 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 8, 2025
  • July 11, 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
STEP File Viewer screenshot #9 for iPhone
STEP File Viewer screenshot #10 for iPhone
STEP File Viewer screenshot #11 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
Show original description

What's New in STEP File Viewer

1.0.12

July 11, 2026

- View orientation has been optimized for the Z-up convention commonly used in industrial and mechanical CAD. - The bottom-right ViewCube has been further improved, keeping standard views, rotate, roll, and reset actions in sync with the model view.

More

Subscription plans

Pro Flex

A one-week flexible subscription.

$1.997 Days
3 Days trial
How to cancel STEP File Viewer subscription ⁉️
9

In-App Purchases

$4.99

Projection view generation & export

Generate and export the model’s projection view.

User reviews

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 (BRep) 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.

Can’t see all step files in a folder

The app requires authorization (?) to open step files. It is unclear how to provide authorization to all step files in a folder recursively. In addition trying to open a folder contained within an enclosing folder only shows some of the folders.
These problems make the app useless.

Response from developer

Currently, batch opening by folder authorization is not supported; only opening one file at a time is supported: select the target file and then click "Authorize". I don't understand the specific scenario described by "In addition trying to open a folder contained within an enclosing folder only shows some of the folders." Could you please email danjian42@gmail.com for further feedback? Thank you for your feedback; I will continue to improve.

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.