ForgeShape: 3D Print Repair
STL, STEP Check & Converter
Free · In‑App Purchases
Print failed, can't tell why or what to fix? ForgeShape finds open edges, bad normals and thin walls before slicing, then exports STL/3MF — all on device.
A print fails and the model still looks fine on screen. ForgeShape opens STL, STEP, IGES, OBJ, GLB and 3MF models on your device, finds what blocks printing — open edges, wrong normals, thin walls, overhangs — repairs it, and exports STL or 3MF for your slicer. It also converts between CAD and mesh formats. Nothing is ever uploaded.
Key features:
- Import STEP (.step/.stp), IGES (.iges/.igs), STL, OBJ, binary GLB and 3MF models, all parsed on device
- Automatic detection: open edges, non-manifold edges, self-intersection (up to 500k triangles), surface orientation, duplicate faces, degenerate triangles, wall thickness, overhang, units and size
- Each body is classified as a solid candidate or an open shell; closed manifold models report a measured volume
- Guided repairs: weld and stitch boundaries, fix surface orientation, remove duplicate faces, fill small holes, remove degenerate triangles, or run them all in sequence
- Repairs apply in one step, then show before/after; deep repair previews, escalates tolerance until the model closes and reports how far geometry moved
- Pick a finding to highlight the affected edges and faces, or let the camera turn to frame it on the far side of the model
- Inspect it your way: shaded, wireframe or both, Y-up and Z-up conventions, focus on any surface point, and level of detail that keeps large meshes responsive
- Select a face to measure planar width, height and area, or cylinder radius, in source units
- Fit the model to a print-size profile with one uniform scale, then recheck automatically
- Three jobs: print to STL or 3MF; convert to OBJ, GLB, STL, 3MF or faceted STEP; Reverse to CAD to STEP
- Source colors are read and shown: OBJ materials, 3MF color groups and baked textures, GLB base colors; on export only GLB carries color
- Reverse to CAD for meshes: planar, cylindrical, conical and spherical faces become analytic STEP geometry; precise CAD sources are not reversed
- Honest reports: every check names its mesh-snapshot evidence and lists what remains unresolved
- Export the check as a PDF, HTML or JSON report in four languages, with marked-up model figures and close-ups of located findings
For 3D-printing users, engineers converting between STEP/IGES and mesh formats, makers fixing scanned or downloaded models, and teams delivering in multiple formats.
Common questions:
- Is ForgeShape a slicer?
No. It handles the step before slicing — checking and repairing the model — and does not generate G-code.
- Can it repair every broken model?
No. Issues beyond the supported scope — non-manifold edges, large openings — are labelled as not automatically repairable. Deep repair closes more models, but states how much the shape changed.
- Does Reverse to CAD recover the full design?
Unrecognized regions stay mesh; the STEP has no feature history and is not guaranteed machinable.
- Are models uploaded to a server?
Never. Import, checking, repair, measurement and export all happen on device. No account, no cloud, and you choose where files are saved.
Pricing & Access
- Free: import and view every format, run every check, apply every repair, read every finding, and export the report.
- Pro subscription: export and save your model — repaired, converted or reversed to CAD. Weekly, monthly or annual, active on Mac, iPhone, iPad and Vision Pro with the same Apple Account.
- Payment is charged to your App Store account. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the current period ends.
- Manage or cancel subscriptions in your App Store account settings.
Privacy & Terms
- Subscriptions, refunds and restores are handled by Apple through your App Store account.
- Privacy Policy: https://apps.h53d.xyz/apps/forgeshape/policy.html
- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Help or feedback? Email iuway@foowei.com or visit https://apps.h53d.xyz/apps/forgeshape/support.html.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Reverse to CAD is now separate from format conversion. After import, choose 3D print check and repair, convert format, or rebuild a mesh as CAD.
- Better reverse reconstruction: cones and spheres are now recognized; cylinders are more accurate; partial surfaces such as half-cylinders follow the real outline; neighboring holes on a plane are kept.
- 3D print repair is more complete: merge part seams, remove extra inner walls, and fill holes more reliably.
- Format conversion names each limit and what it means for the exported file, so you can tell whether the result will work.
- Keyboard shortcuts on Mac and on iPad with a hardware keyboard: Open ⌘O, Export ⌘E, Export PDF report ⌘⇧E, Repair ⌘R.
- Easier touch: buttons and format options are easier to tap, the splitter is easier to drag, tap a repair for details; a numeric keyboard appears when you edit check thresholds.
The developer, Shanghai Fuwei Information Technology Co., Ltd., 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shanghai Fuwei Information Technology Co., Ltd.
- Size
- 31.1 MB
- Category
- Graphics & Design
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 3 more
- English, German, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Annual $39.99
- Pro Monthly $9.99
- Pro Weekly $4.99
- Copyright
- © 2026 Foowei
