v1.0.30

Download 3D CAD Converter

Convert your own files now: 10 conversions at full quality within 30 days, free. After that you keep converting with no end date; CAD-to-mesh exports drop to Draft quality and files carry a trial note. $179 once restores full quality. No card, no account, no upload. STEP, IGES, STL, OBJ, glTF and 15+ 3D formats in batch, with STEP/IGES surface repair, tessellation and assembly support.

Download me! See Features

Free trial No account required Windows 10/11 Lost your key?

3D CAD Converter application showing a STEP assembly loaded in the live 3D preview pane
100% Offline Secure & Private
15+
3D Formats
Batch
Processing
3D
GPU Preview
100%
Offline

All the 3D Formats You Need

What can I get from my file?

Find the kind of file you have and see what it can become

Your file
3D printingSTL · 3MF · OBJ · PLY
Web, AR and gamesglTF · GLB · FBX · DAE
ViewersVRML · X3D · OFF
CAD exchangeSTEP · IGES · BREP
Solid CADSTEP · IGES · BREP
3D printingYes
Web, AR and gamesYes
ViewersYes
CAD exchangeYes
MeshSTL · OBJ · 3MF · PLY · glTF · GLB · FBX · DAE · X3D · OFF · AMF
3D printingYes
Web, AR and gamesYes
ViewersYes
CAD exchangeNo
3D faces in drawings and scenes (read only)DXF · DWG · USD · USDZ
3D printingYes
Web, AR and gamesYes
ViewersYes
CAD exchangeNo
Native SolidWorks, Inventor or CATIA.sldprt · .ipt · .CATPart
Not read directly. Save as STEP in that program first, then every column above is open to you.
From the app's own format list (cadconvert formats, version 1.0.26). A mesh cannot become STEP, IGES or BREP: those need exact surfaces that a mesh does not store. A 2D-only DWG or DXF drawing has no 3D faces to convert.

Trial or license

What the free trial gives you, and what a license adds

Free trial
Own it
Subscribe
Conversions
Conversions10 then trial exports, no limit
ConversionsUnlimited
ConversionsUnlimited
How long
How longFull quality: 10 conversions within 30 days. After that: no end date
How longForever, updates included
How longWhile you subscribe
Export quality
Export qualityYour choice for 10, then Draft for CAD to mesh
Export qualityYour choice
Export qualityYour choice
Features
FeaturesEvery feature
FeaturesEvery feature
FeaturesEvery feature
Watermark
WatermarkNever
WatermarkNever
WatermarkNever
Price
Price$0, no card
Price$179 once
Price$39 per quarter
After the 10th conversion or on day 30, conversions keep running until you enter a license key: STEP, IGES or BREP to a mesh format is meshed at Draft quality, other conversions keep full geometry, and each file carries a trial note (FBX excepted). The 3D preview stays at full quality, and files you already converted stay as they are.

Professional 3D Conversion Tools

Advanced geometry kernels ensure precision during conversion, maintaining metadata and hierarchy.

Batch Format Conversion

Convert entire folders between STEP, IGES, STL, OBJ, 3MF, glTF and more. Drag-and-drop, naming templates, folder mirroring.

STEP & IGES Surface Repair

Fixes broken edges and faces and sews small gaps before a STEP or IGES part is meshed, so fewer holes reach the slicer. Mesh files such as STL or OBJ are converted as they are.

Tessellation Control

Fine-tune STEP/IGES to mesh with chord deviation, angular deflection, max edge length. Quality presets from Draft to Ultra.

3D Preview & Inspection

GPU-accelerated viewer. Wireframe, solid, X-ray modes. Measure distances, inspect assemblies, verify conversion quality.

CLI & Automation

Full command-line interface. Watch-folder mode. Profile presets. JSON output. Exit codes for CI/CD.

Assembly Support

Preserve multi-part hierarchy. Export merged or individual parts. Assembly tree with transformations.

After you click Download

Three steps to your first converted file

  1. Run the small installerCadConverterPremium2026-WebSetup.exe is 2.6 MB. Open it from your Downloads folder.
  2. Setup fetches the appIt downloads the 142 MB app package and installs it: about 199 MB on disk.
  3. Drop in a 3D fileOpen 3D CAD Converter, add a STEP, IGES or STL file and convert. 10 free conversions within 30 days.
    Your PC needs
  • Windows 10 or Windows 11 (64-bit)
  • 4 GB RAM minimum (8 GB recommended for large assemblies)
  • 500 MB free disk space
  • Internet only during setup
  • No account required
Sizes of the version 1.0.26 files on our server. If your antivirus blocks the small installer, the full offline installer below needs no download during setup.

Who Uses 3D CAD Converter

Manufacturing Engineers

Precision part conversion

Architects & BIM

BIM & structural assets

Aerospace & Defense

Critical component integrity

Game & Web 3D Developers

CAD to Game Engine pipeline

Download me!

Free trial No account required Windows 10/11

Frequently Asked Questions

What 3D formats are supported?

STEP (AP203/AP214/AP242), IGES, STL, OBJ, 3MF, glTF/GLB, FBX, VRML, DXF, PLY, BREP, Collada, AMF, X3D, and OFF.

Does it work offline?

Yes — 100% offline. No cloud processing, no internet required. Your CAD files and IP stay on your machine.

Can it repair meshes?

It repairs STEP, IGES and BREP surfaces before meshing: broken edges and faces are fixed and small gaps are sewn shut. An STL or OBJ you already have is converted as it is, not repaired.

Is there a CLI?

Yes — full command-line interface with watch-folder mode, profile presets, JSON output, and CI/CD exit codes.

OpenCASCADE Technology is used under LGPL license. All trademarks belong to their respective owners.

Free trial: every feature, 10 conversions at full quality within 30 days of first launch. After that, conversions keep running with no end date: STEP, IGES or BREP to a mesh format is meshed at Draft quality, other conversions keep full geometry, and each file carries a trial note (FBX excepted). A license key removes both.

System Requirements

Antivirus or firewall blocking the download? Get the full offline installer

Published by ContentaSoft, Umea, Sweden — developer of 3D CAD Converter.

3D CAD Converter is a desktop application for Windows that batch converts STEP, IGES, STL, OBJ, glTF, and 15+ 3D CAD formats with STEP/IGES surface repair and tessellation control.

This software contains no adware, spyware, toolbars, or bundled third-party programs. The installer installs only 3D CAD Converter.

All 3D files are processed locally on your computer. No files are uploaded to any server. The software does not collect personal data.

Free trial: every feature, 10 conversions at full quality within 30 days of first launch. After that, conversions keep running with no end date: STEP, IGES or BREP to a mesh format is meshed at Draft quality, other conversions keep full geometry, and each file carries a trial note (FBX excepted). A license key removes both. Lifetime license: $179 (one-time payment, no subscription).

How to Uninstall
Open Windows Settings > Apps > Installed apps, find "3D CAD Converter" in the list, and click Uninstall. You can also run the uninstaller from the installation folder or use Control Panel > Programs and Features.

Download size: ~2 MB (web installer). Additional components are downloaded during installation.

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