Can I open an IPT file online without Inventor?

Yes, for supported Autodesk Inventor IPT files. Upload the part and inspect the converted geometry in the browser.

Can I open an IAM assembly online?

Yes, when the assembly and referenced local files are packaged in a ZIP with their relative paths preserved.

What if my IAM assembly has missing parts?

CADProps reports the incomplete scope. Properties apply only to loaded geometry until the missing files are supplied.

Can I measure an IPT file?

Yes. Check overall dimensions and supported geometry properties, then verify units with a known dimension.

Can I convert IPT or IAM to STEP?

Supported Inventor inputs can be converted to STEP. The neutral output does not preserve the original Inventor feature history.

Does an IDW drawing load as an Inventor model?

No. An IDW shows only its saved preview image, without resolving IPT/IAM drawing views or reading dimensions and title blocks. Units are unknown; there is no 3D geometry, rotation, measurement, exact property calculation or model conversion. Ask for PDF, DXF, DWG or the model when the saved preview is absent.

IPT Viewer Online: Open Inventor IPT & IAM Files, No Inventor

Capabilities and limits

Open Autodesk Inventor IPT files online and inspect supported IAM assemblies from ZIP. Check dimensions and converted geometry, then export validated models to STEP.

Native-file compatibility depends on the saved version and geometry; missing assembly references limit results to loaded components.

Files are uploaded for server processing; support depends on format, version and geometry.

Viewing and measuring do not require an account. Sign in to convert, save files across devices or create share links.

IDW drawings show only their saved preview image: unknown units, no drawing-content reading, 3D geometry, measurement or model conversion.

Need to open an IPT file without Autodesk Inventor? Upload the part, inspect the converted geometry and dimensions, and use a ZIP for IAM assemblies with referenced components. The viewer is for inspection and neutral conversion, not native feature editing.

Open an IPT file online

Upload the Autodesk Inventor IPT part and wait for the temporary workspace to process it. Rotate the model, fit the view and check overall dimensions. Verify one known size before using calculated properties.

IPT vs IAM: which file to upload

An .ipt is a single Inventor part. Upload it on its own and it opens in the browser; see how to open an IPT without Inventor. An .iam is an assembly that mostly stores references to other IPT and IAM files plus placement, so on its own it has little geometry to show. Upload the IAM with its parts in one ZIP, as described in opening an IAM without Inventor and missing parts in an IAM. If you only need one component, upload that IPT directly.

	IPT	IAM
What it is	One part	Assembly of parts and sub-assemblies
Upload as	The `.ipt` file	A ZIP with the IAM and every referenced file
Result	Exact when the B-Rep is read completely, otherwise marked approximate	Display geometry Inventor saved; approximate properties, mesh STEP

Inspect IAM assemblies with their references

IAM files can depend on IPT parts and nested assemblies. Preserve the relative folder structure inside a ZIP and choose the intended top-level assembly when required. Missing references produce a partial-result warning.

Inventor's Pack and Go copies an assembly and every referenced file into one folder; zip that folder and upload it. Content Center parts such as screws and nuts usually live in a separate library folder. If they are not in the ZIP, they appear as missing components and are left out of the totals.

Check geometry and units before using mass

Volume and surface area describe the loaded converted geometry. Mass additionally depends on the density you choose. Do not assume a browser viewer has recovered the original Inventor material definition or manufacturing tolerance.

Use STEP for a neutral downstream handoff

If the recipient does not use Inventor, convert the supported model to STEP with the IPT to STEP converter and verify the result. You can open the resulting file in the STEP file viewer. Keep the native IPT/IAM source when future parametric editing matters.

Treat native-version support as a compatibility check

Inventor save versions and model complexity vary. If an IPT or IAM cannot be read, keep the original unchanged and ask the sender for the source release or a fresh STEP export rather than renaming the file.

Exact and approximate results

IPT parts give exact properties and exact STEP only when their B-Rep is read completely. IAM assemblies are shown from the display geometry Inventor saved, with approximate properties, and export as mesh STEP. Files saved without display geometry show their saved thumbnail.

Where exact IPT geometry comes from

An IPT keeps its solid as ACIS-format B-Rep data. When CADProps reads that data completely, volume, surface area and the STEP export come from the solid; Inventor appearances and part names are not carried over. When it cannot, the part is shown from the display geometry Inventor saved and the result is marked approximate. In both cases, mass uses the density you choose, not the Inventor material.

IDW is a drawing preview, not an IPT model

An Inventor .idw can be uploaded to display its saved preview image. CADProps does not resolve its drawing views against IPT/IAM references or read dimensions and title-block fields. The preview has unknown physical units and provides no 3D geometry, rotation, measurement, exact properties or model conversion. When the image is absent or insufficient, request PDF, DXF or DWG for drawing review, or the IPT/IAM files or STEP for the model itself.

Input formats: IPT / IAM / IDW (saved image only)

Open this tool

General steps for uploading, viewing, sectioning, measuring, converting and exporting are explained once in How it works. This page covers what is specific to this file type.

Real CADProps screenshots

The screenshots show the English interface. Captions and instructions describe the same operations.

Properties — INV_nist_ctc_01_asme1_2021.ipt · 800 × 450 × 150 mm · volume unavailable · 806,723.984 mm² This native preview is evidence for the pictured file and version only. It does not establish universal compatibility, exact B-Rep measurements or successful STEP conversion.

Sample source and verification

When a result needs another check

Viewing can start without an account. Conversion, account storage and share creation require signing in. Temporary files expire after the displayed retention period. Read the privacy statement for server processing and deletion, and the accuracy notes before using numerical results. Do not assume that hiding a part, clipping it or exploding an assembly changes the exported source geometry.

When a result needs another check · Input formats

Continue with a related task

For fast part and assembly viewing, see Fast CAD viewing with CADProps, with real model examples and loading times.

Original article: CADProps · https://www.cadprops.com/tools/inventor-viewer/

A reproducible example

Public NIST CTC01 saved by Inventor 2021 displayed a converted mesh, approximately 800 × 450 × 150 mm. Volume and mass were unavailable because the mesh was not reliably closed. See the guide for the actual screenshot and CSV.

Repository-generated samples are synthetic test models. Verify your own model's units and geometry before using results.