What this tool does
Use this 3D file to STL converter when you need one local workflow for 3MF, GLB, STEP, and STP files.
When this tool fits
Best when the source format is uncertain
one upload flow accepts 3MF, GLB, STEP, and STP before exporting STL.
Best for quick STL handoff
the preview lets you inspect parsed geometry before downloading STL.
Best when metadata is less important than geometry
the output focuses on triangle mesh data for slicers and downstream tools.
How to use it
- 1
Upload a supported 3D file
Choose a 3MF, GLB, STEP, or STP file from your device.
- 2
Review the parsed model
Check the preview, dimensions, mesh count, and diagnostics.
- 3
Choose STL settings
Set scale, size limit, centering, floor placement, and merge mode.
- 4
Export STL
Download STL output generated from the loaded geometry.
Specs and limits
- Input
- 3MF, GLB, STEP, and STP
- Output
- Binary STL
- Preview
- Mesh, triangle count, and dimensions
- Processing
- Local browser parsing and export
- Does not preserve
- Color, material, texture, or CAD metadata in STL output
- Output is STL geometry only.
- Source format metadata is not preserved.
FAQ
Which files are supported?
3MF, GLB, STEP, and STP are supported in this rollout.
Does this page convert STL to STL?
No. This page is for converting 3MF, GLB, STEP, or STP into STL. Use the STL viewer when you only need to inspect an STL file.
When should I use a format-specific converter instead?
Use GLB to STL or STEP to STL when you want instructions and limitations focused on that exact source format.