Add your STEP file
Drop one or more .step files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
STEP to USDZ
Converting .step CAD geometry to .usdz triangulates exact engineering surfaces into a mesh that printers and viewers understand. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop STEP files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting STEP 3D model to Universal Scene Description ZIP
Converting .step CAD geometry to .usdz triangulates exact engineering surfaces into a mesh that printers and viewers understand. A .step file stores an exact 3D product model under ISO 10303, the international standard known as STEP (Standard for the Exchange of Product model data). Unlike mesh formats it records precise boundary-representation geometry, so a cylinder stays a true cylinder rather than a bundle of triangles, which makes it the lingua franca for moving parts between CAD packages from different vendors.
A .usdz file is a single-file package containing a USD scene together with every texture and asset it references. It is an uncompressed ZIP archive with strict alignment rules, so its contents can be read straight from disk without unpacking — which is what makes it viable as a mobile AR format. For this route the practical draw is one file carries the whole scene, textures included — no missing-asset problems and native, zero-install rendering across Apple platforms — balanced against uncompressed by design, so packages are considerably larger than a compressed equivalent, which is worth knowing before you commit a large batch.
Why convert STEP to USDZ?
The practical trigger for this conversion is usually a mismatch: with .step, verbose text files that grow large and import slowly on complex assemblies. Switching to .usdz buys you one file carries the whole scene, textures included — no missing-asset problems, which is why it is the better fit for publishing an AR model that opens directly on iPhone and iPad with no app. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
STEP vs USDZ at a glance
| Aspect | STEP 3D model (.step) | Universal Scene Description ZIP (.usdz) |
|---|---|---|
| Format type | Vector — resolution-independent geometry instead of pixels | Container — quality depends on the codecs and settings inside |
| How it stores data | plain-text Part 21 files open with the literal header ISO-10303-21; and contain a HEADER section followed by numbered entity instances in a DATA section | the package is a ZIP with STORED entries only — never deflated — so readers can memory-map the payload in place |
| Strongest at | moving solid models between different CAD systems, such as SolidWorks to Fusion 360 or CATIA to NX | publishing an AR model that opens directly on iPhone and iPad with no app |
| Weak spot | verbose text files that grow large and import slowly on complex assemblies | uncompressed by design, so packages are considerably larger than a compressed equivalent |
| Metadata | the Part 21 header records author, organization, originating system, and timestamps, and product entities carry part names and descriptions through the exchange | uSD layer metadata — up-axis, metres-per-unit, default prim — is present in the package; the geometry-only targets cannot carry it |
Pick USDZ as the output
Select .usdz in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if USDZ is selectable, the route is real and validated.
Convert on your device
Press Convert. Open CASCADE compiled to WebAssembly triangulates the exact CAD geometry into a mesh inside your browser.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid USDZ file. Outputs keep the original filename with the .usdz extension.
STEP to USDZ questions, answered
Will converting STEP to USDZ lose quality?
The conversion is exact at the resolution you rasterize to — vectors have no pixels until they are drawn. Pick dimensions that match the largest size you will display, because unlike .step, a .usdz raster cannot be enlarged cleanly afterwards.
Is it private to convert STEP files here?
Yes — the .step file is processed inside your browser tab and never uploaded. Open CASCADE compiled to WebAssembly triangulates the exact CAD geometry into a mesh inside your browser. Close the tab and the file is gone from memory.
Where will the USDZ file work?
iOS and macOS render USDZ natively through AR Quick Look and Preview; Blender, Maya, Houdini, Omniverse and Adobe Aero import it. Android relies on separate viewers and generally prefers glTF. Novus Convert both reads and writes USDZ locally: it is the output of eleven mesh routes as well as an input of its own, which is why promoting it unblocked far more pages than its own.
Will the USDZ file be bigger or smaller than my STEP?
It depends on the content: the package is a ZIP with STORED entries only — never deflated — so readers can memory-map the payload in place. Convert one representative file first and compare before batch-processing a large set.
What happens to the metadata in my STEP file?
In .step, the Part 21 header records author, organization, originating system, and timestamps, and product entities carry part names and descriptions through the exchange. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.