Choose a STL file
Drop your STL model into the converter or select it from your device.
3D ConverterSTL to STEP
Runs locally in your browser
STL to STEP Converter
Convert STL to STEP directly in your browser, then inspect and download the result. A faceted STEP representation of the input triangles. Original parametric features and smooth analytic surfaces are not reconstructed.
A faceted STEP representation of the input triangles. Original parametric features and smooth analytic surfaces are not reconstructed.
Drop your STL file here
or choose a file from your device
Up to 100 MB total. Select accompanying textures, .bin and .mtl files together with the model. External URLs are not fetched.
Output format
STEP
Local conversion — the file stays on this device
How to convert STL to STEP
Validate and convert
The converter checks the source format before processing the model geometry.
Download the STEP
Save the generated STEP file and open it in your preferred 3D application.
Browser conversion
How STL becomes STEP
Source fileSTL
Browser conversion3D
Output fileSTEP
A faceted STEP representation of the input triangles. Original parametric features and smooth analytic surfaces are not reconstructed.
Data map
What survives STL to STEP
This map describes the exported result, not the original source file. Review every amber item in the receiving application before relying on it.
GeometryPreserved
MaterialsNot retained
TexturesNot retained
Animation & riggingNot retained
Units & orientationReview
CAD featuresNot retained
About STL to STEP conversion
A faceted STEP representation of the input triangles. Original parametric features and smooth analytic surfaces are not reconstructed.
Important STL to STEP limitation
STL contains triangle meshes rather than the original CAD features. A STEP result cannot restore the original feature tree or exact analytic surfaces automatically; this converter is therefore presented as a beta workflow.
Related converters
3D ConverterBefore you convert
What is preserved when converting STL to STEP?
A faceted STEP representation of the input triangles. Original parametric features and smooth analytic surfaces are not reconstructed.
When is STEP the right output format?
Choose this output only when a downstream engineering workflow accepts a faceted representation. It is not a recovery of the original parametric CAD model.
What should I check after converting STL to STEP?
CAD and mesh formats describe geometry differently. This workflow may tessellate CAD or create faceted geometry; it does not restore feature history, constraints or assembly intelligence. Open the downloaded file in the application you plan to use. Check scale, orientation, mesh completeness and the format-specific limits described above before printing, manufacturing or production use.
Where is my model processed?
Available converters process files in your browser. Saving to the workspace stores a GLB copy in this browser's local database; clearing site data removes it.