Convert IPT to IGS

What the IPT format is

IPT is Autodesk Inventor's native part format. It can contain a single parametric 3D part, including sketches, constraints, feature history, construction geometry, parameters, materials, and appearance data. Inventor users create IPT files for mechanical design, supplier exchange, and components used in Inventor assemblies. An IPT is a part file, not an Inventor assembly file; assemblies normally use .iam.

What the IGS format is

IGS, also called IGES, is a neutral CAD exchange format using the .igs or .iges extension. CAD, CAM, CNC, metrology, inspection, and visualization applications commonly support it. IGES can represent wireframes, trimmed surfaces, and, when the exporter and importer support the relevant entities, boundary-representation solids.

IGES transfers geometry rather than Inventor design intent. It normally does not retain sketches, constraints, parameters, feature trees, model history, materials, or dependable assembly relationships. Many receiving applications import an IGES part as a non-parametric “dumb” solid or as a collection of surfaces.

How to convert an IPT file in Inventor

1. Open the .ipt file in Autodesk Inventor and resolve missing references or failed features.
2. Hide construction geometry, work features, sketches, and bodies that should not be included in the exchange. Suppressed or failed features can change the exported shape.
3. Choose File → Save As → Save Copy As.
4. Set the file type to IGES Files (*.igs, *.iges), specify the output filename, and open Options when available.
5. Use the IGES representation and unit settings required by the receiving application. Keep the source model's units unless the recipient specifies another convention.
6. Save the file, then open the exported .igs or .iges file in the destination CAD system or an independent viewer. Check overall dimensions, hole locations, face visibility, and solid or surface validity.

Inventor is the safest choice because it reads the native IPT data directly. Depending on the Inventor release, the same export may also be available through File → Export → CAD Format.

Other conversion options

Autodesk Fusion can open or upload many Inventor part files and may provide IGES export through File → Export. Support for particular Inventor versions, linked data, and IGES export settings varies by Fusion release and workspace, so verify the resulting file rather than assuming feature or unit fidelity.

Online services such as CAD Exchanger Cloud may accept IPT and produce IGES. The exact input versions, output formats, file-size limits, and account requirements can change. The general process is to upload the IPT, choose IGES as the output, start the conversion, download the result, and validate it in a local CAD application. Do not upload confidential, export-controlled, or supplier-restricted designs unless the provider's processing, retention, deletion, and access terms are acceptable.

CAD Exchanger Desktop is an alternative for users who need local processing and whose installed version supports both Inventor IPT input and IGES output. Check the product's current format matrix before purchasing or converting a production file.

Quality and compatibility limitations

IGES implementations differ. One importer may create a valid solid, while another may produce unstitched surfaces or separate faces. If the target reports gaps or failed sewing, try the export options offered by Inventor, export surfaces when the recipient specifically requests them, or ask which IGES entity types the target supports.

Unit interpretation is a frequent source of incorrect scale. Confirm the unit system in both applications and measure a known dimension after import. Small faces, tight blends, patterned features, non-manifold geometry, self-intersections, and damaged source models can cause missing faces or failed stitching.

For modern CAD systems that support it, STEP is often preferable to IGES for solid and assembly exchange. Use IGES when the receiving system requires it, especially for legacy surface-based, inspection, or manufacturing workflows.