Convert Any CAD File to Print-Ready STL or 3MF
Batch convert STEP and IGES files for your 3D printer. Surface repair sews small gaps before meshing, so fewer broken STLs reach the slicer.
Desktop app · $179 one-time · STEP/IGES surface repair included · Batch processing
Download Free TrialFree trial: 10 conversions with every feature. No credit card required. Windows 10/11.
The 3D Printing File Problem
Without 3D CAD Converter
- Downloaded model won't open in your slicer
- Mesh errors cause failed prints and wasted filament
- Converting one file at a time from CAD software
- No control over mesh density and polygon count
With 3D CAD Converter
- Convert any 3D format to STL or 3MF instantly
- Broken STEP and IGES surfaces repaired before meshing
- Batch convert entire folders for print farms
- Tessellation control — Draft to Ultra quality presets
Built for 3D Printing Workflows
Convert STEP, IGES, OBJ, and any supported format to print-ready STL (ASCII or binary) and 3MF.
Before a STEP or IGES part becomes triangles, OpenCascade fixes broken edges and faces and sews small gaps between surfaces. STL and OBJ files are converted as they are.
Fine-tune mesh density. Draft for quick prototypes, Ultra for precision parts. Control chord deviation and angular deflection.
Process entire print queues. Convert hundreds of files in one run. Watched-folder mode for continuous operation.
Surface Repair: Before & After
Without 3D CAD Converter
A STEP or IGES file with small gaps between faces meshes into an STL with open edges. Your slicer reports non-manifold edges or refuses to slice.
With 3D CAD Converter
With Repair ticked, broken faces are fixed and small gaps sewn before meshing, so the STL has no open edges where the surfaces could be joined. Gaps too wide to sew need a fix in the source CAD file.
How It Works
Download & Install
Free trial: 10 conversions with every feature. Windows 10/11.
Add Your Files
Drag and drop files or entire folders. 15+ 3D formats supported.
Click Convert
Batch processing handles entire folders with progress tracking and ETA.
Watch a STEP file become a print-ready STL
Stop Paying Annual Subscriptions
| Tool | Price | Model |
|---|---|---|
| CAD Exchanger | Subscription (annual renewal) | |
| Spin 3D | Subscription (annual renewal) | |
| 3D CAD Converter | $179 | ✔ Pay once, own forever |
Free trial: 10 conversions with every feature. No credit card required. Windows 10/11.