STEP to 3MF
Convert STEP to a 3MF model online. Preview dimensions and export a file with explicit units for slicer import. Free, no sign-up required.
Your model goes here.
Choose your file or try the original sample below. No installation or sign-up.
01 / HOW IT WORKS
Open, inspect, then use your result.
- 01
Open your file
Choose, drop or paste your STEP file. All three input methods use the same local checks.
- 02
Look from every angle
Orbit, zoom and switch between standard views. Read the dimensions and object count beside the model.
- 03
Download the converted file
After conversion, download 3MF. Open the result in your destination software and check the units before use.
02 / TRY IT YOURSELF
A real file. A result you can check.
This original four-hole plate measures 80 × 50 × 8 mm. The sample uses the input format for this page. Use the default unit and axis settings to reproduce those dimensions.
Original public sample. Your uploads are never added to this gallery.
03 / FORMAT & USE
STEP to 3MF
Prepare STEP geometry for slicer import in a single 3MF file. Separate mesh objects retain their positions and the output declares millimeters. STEP solids are tessellated using the preview mesh. The 3MF contains meshes, not exact CAD surfaces or an editable feature tree.
What this viewer supports
This is a model-only 3MF, without printer profiles, supports, slicing settings or G-code. Conversion does not repair meshes or certify printability.
STEP and STP solid models up to 32 MiB and 2,000 solids. The converted geometry must also fit a 16 MiB internal limit, so file size alone does not guarantee a model will open. Complex models may exceed the time or memory budget.
04 / QUESTIONS
Know your input. Understand your output.
Can I send this 3MF directly to my printer?
Import it as a model into your slicer, check scale and orientation, choose a printer and material, then slice it. It is not a ready-to-print machine file.
Do I need an account or credits?
No. These tools are free and run in your browser. No account, subscription or credits are required.
Is my model uploaded?
No. Your selected file is read and processed in this browser. The page downloads its CAD engine and public samples, but does not upload your model. Refreshing or leaving the page clears the current file from the tool.
How are units and orientation handled?
The overall bounds come from the imported solid geometry and are shown in millimetres. They are not point-to-point measurements or drawing tolerances. If the declared units are unknown, check a known dimension before relying on the result.
Can I paste a file from my computer?
Copy a file in your file manager, then paste here. Your browser must expose the clipboard as a file; a copied path or text will not open a model.