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 GLB
Converting .stp CAD geometry to .glb triangulates exact engineering surfaces into a mesh that printers and viewers understand. Free, private, and validated — the file never leaves your browser.
100% private for supported formats
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 glTF binary mesh
Converting .stp CAD geometry to .glb 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 .glb file is the binary packaging of glTF 2.0: JSON scene description, mesh buffers, and optional textures packed into one little-endian container with a fixed header and typed chunks. It is the usual way to ship a self-contained realtime 3D asset without sidecar .bin files. For this route the practical draw is single-file, widely supported realtime mesh container and efficient binary buffers with predictable alignment — balanced against scene graph, materials, and animations are richer than many converters preserve, which is worth knowing before you commit a large batch.
Why convert STP to GLB?
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 .glb buys you single-file, widely supported realtime mesh container, which is why it is the better fit for publishing web and AR models that must load from one file. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
STP vs GLB at a glance
| Aspect | STEP 3D model (.stp) | glTF binary mesh (.glb) |
|---|---|---|
| Format type | Vector — resolution-independent geometry instead of pixels | Vector — resolution-independent geometry instead of pixels |
| 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 | begins with a 12-byte header (magic glTF, version 2, total length) followed by a JSON chunk and usually one BIN chunk |
| Strongest at | sending exact solids to machine shops and suppliers that request the .stp spelling | publishing web and AR models that must load from one file |
| Weak spot | the dual naming causes confusion and duplicate entries in format lists | scene graph, materials, and animations are richer than many converters preserve |
| Metadata | identical to the longer spelling: header fields for author, organization, and originating system, plus named product structure inside the data section | asset generator and copyright fields live in the JSON asset object; richer metadata usually rides in extras or vendor extensions |
Pick GLB as the output
Select .glb in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if GLB 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 GLB file. Outputs keep the original filename with the .glb extension.
STP to GLB questions, answered
Will converting STP to GLB lose quality?
Since stp is vector-oriented and glb is vector-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .glb itself requires.
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 GLB file work?
Windows 3D Viewer, Blender, glTF Sample Viewer, three.js, Babylon.js, Unity, Unreal, and most modern DCC tools import .glb. Mobile AR frameworks and web engines treat it as a first-class mesh package.
Will the GLB file be bigger or smaller than my STP?
It depends on the content: begins with a 12-byte header (magic glTF, version 2, total length) followed by a JSON chunk and usually one BIN chunk. 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.