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STL to STEP Assistant

STL to STEP Assistant

Mesh Models to STEP Files

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1 review
🔧 Utilities
🛠️ Developer Tools
Free
In-App Purchases

Details

  • Released
  • Updated
  • May 17, 2026
  • August 24, 2026

Features

Developer

维 艾
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🧾$6.99 - $9.99
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About

Convert various 3D mesh model formats into STEP files for CAD workflows. Preview models, choose conversion quality, and export with BRep reconstruction for editable CAD surfaces. Process files locally for enhanced privacy.

✓Convert STL, OBJ, GLB, FBX, and more to STEP
✓BRep reconstruction for editable CAD surfaces
✓Multiple STEP export quality modes
✓Preview models before export
✓Local file processing for privacy
✓Inspect STEP file results
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What's New in STL to STEP Assistant

1.0.6

August 24, 2026

- New Mesh Health check: after a model loads, it scans for open boundaries, non-manifold edges, duplicate triangles and similar issues; select a count to highlight those spots on the model - New Export Prep: clean up the mesh before exporting and see what changed, with zero-area faces removed automatically by default - Export results now report the Output Body type (Solid / Shell / Surface), flag 3D printing risk when the result is not a closed solid, and add a matching filename suffix - Fixed BRep conversion failing on larger models, improved sphere detection for models far from the origin, and refined the preview and export panel messages

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Subscriptions & In-App Purchases

$6.99

Unlock Faceted STEP Quality

Unlock advanced choices for mesh-based STEP export.

User reviews

Most RecentHighest RatedLowest Rated

300s time limit

I paid for the most expensive experience of this app and could not export my files due to a 300 seconds time limit. I want my money back
LucasMOlivLucasMOliv

Response from developer

Hi, I am very sorry for the bad experience. A 300-second timeout is set to avoid infinite processing on large files or complex models. Due to iOS system restrictions on app execution, large files or complex models are recommended to be converted on macOS. For a refund, please request it directly through Apple at reportaproblem.apple.com, as developers cannot issue refunds directly. If you are willing, please send the model file to danjian42@gmail.com so we can optimize performance for files like yours. Thank you for your reach out.

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FAQ

What file formats can STL to STEP Assistant convert to STEP?

STL to STEP Assistant supports a wide range of formats including STL, STLB, GLB, 3MF, USDZ, OBJ, 3DM, FBX, DAE, PLY, 3DS, AMF, DRC, KMZ, MPD, and WRL. It focuses on converting these mesh-based models into the STEP file format.

Does STL to STEP Assistant offer BRep reconstruction?

Yes, STL to STEP Assistant offers BRep reconstruction as an export option. This feature attempts to convert suitable mesh models into easier-to-edit CAD surfaces, which is particularly useful for engineering parts and regular geometry.

What are the different STEP export quality modes in STL to STEP Assistant?

STL to STEP Assistant provides several STEP export quality modes: BRep (for CAD surfaces), Faceted Small (fast and lightweight), Faceted Balanced (balances detail and file size), Faceted High (preserves more detail), and Faceted Original (exports as close to the source mesh as possible).

Is STL to STEP Assistant free to use?

STL to STEP Assistant is free to open, preview, inspect models, load STEP files, and use the Small STEP export. Advanced features like BRep export and higher quality faceted exports require an in-app purchase.

Does STL to STEP Assistant collect user data?

No, STL to STEP Assistant is privacy-focused. It does not require an account, login, or any form of tracking or data collection. All file processing is done locally on your device.

What devices is STL to STEP Assistant available on?

STL to STEP Assistant is supported on Mac, iPhone, and iPad devices. This allows users to convert models across different Apple platforms.

How often is STL to STEP Assistant updated?

The latest version of STL to STEP Assistant is 1.0.6, and it was last updated on August 24, 2026. This indicates a recent update, suggesting ongoing development and support.

What is the age rating for STL to STEP Assistant?

STL to STEP Assistant has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content concerns.