Add your STP file
Drop one or more .stp 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.
STP to USDZ
Converting .stp 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 STP 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 .stp CAD geometry to .usdz triangulates exact engineering surfaces into a mesh that printers and viewers understand. Files named .stp are STEP models wearing the three-letter extension that DOS-era 8.3 filename limits made necessary; there is no format difference between .stp and .step. Inside is an ISO 10303 product model — precise solid geometry written as plain text for exchange between CAD systems.
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 STP to USDZ?
The practical trigger for this conversion is usually a mismatch: with .stp, the dual naming causes confusion and duplicate entries in format lists. 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.
STP vs USDZ at a glance
| Aspect | STEP 3D model (.stp) | 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 | byte-for-byte the same syntax as .step, so renaming between the two extensions changes nothing about how any parser treats the file | the package is a ZIP with STORED entries only — never deflated — so readers can memory-map the payload in place |
| Strongest at | sending exact solids to machine shops and suppliers that request the .stp spelling | publishing an AR model that opens directly on iPhone and iPad with no app |
| Weak spot | the dual naming causes confusion and duplicate entries in format lists | uncompressed by design, so packages are considerably larger than a compressed equivalent |
| Metadata | identical to the longer spelling: header fields for author, organization, and originating system, plus named product structure inside the data section | 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.
STP to USDZ questions, answered
Will converting STP 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 .stp, a .usdz raster cannot be enlarged cleanly afterwards.
Is it private to convert STP files here?
Yes — the .stp 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 STP?
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 STP file?
In .stp, identical to the longer spelling: header fields for author, organization, and originating system, plus named product structure inside the data section. 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.