Convert STL to 3MF
Convert STL to 3MF online for free. No signup required. Your files upload over an encrypted connection and are deleted after 2 hours.
Free
no account needed
Frankfurt
stored in the EU
2 hours
then files are deleted
New conversion
Any format in, the right format out
Drag and drop your files here, or import from:
Upload files up to 100 MB in STL
How to convert STL to 3MF
Everything happens on this page, in any modern browser, with nothing to install.
Upload your STL file
Drag and drop your STL file or browse from your device, Google Drive, Dropbox, or OneDrive.
Convert to 3MF
Press Convert. To convert several STL files at once, add them all first.
Download your 3MF
Most files are ready in seconds.
What you get when you convert STL to 3MF
Each STL file you add comes back as its own download, under its original name.
- 01
With several results, Download all saves them all with one click.
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If one file in a batch fails, the others still finish, and the result says what went wrong.
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Your 3MF file converts on to OBJ, PLY, GLB and 5 more here.
What STL and 3MF files are
STL
STL is the standard file format for 3D printing. It describes a model's surface as a mesh of triangles without colour, texture or units, which keeps it simple and universally supported by slicers and CAD software.
3MF
3MF (3D Manufacturing Format) is the 3D printing format of the 3MF Consortium, founded in 2015 by Microsoft and other industry members. A 3MF file is a ZIP package holding the model in XML with its units, colours, materials and the placement of every object on the build plate, and it is the project format of slicers such as PrusaSlicer, Bambu Studio and Cura.
Convert your STL files to other formats
Choose a target format below to convert your STL files quickly and easily.
STL to OBJ
OBJ is a plain-text 3D geometry format from Wavefront.STL to PLY
Convert STL files to PLY format.STL to GLB
Convert STL files to GLB format.STL to GLTF
Convert STL files to GLTF format.STL to DAE
Convert STL files to DAE format.STL to FBX
Convert STL files to FBX format.STL to X3D
Convert STL files to X3D format.STL to 3DS
Convert STL files to 3DS format.
Convert other files to 3MF
Select a source format below to convert files to 3MF.
DXF to 3MF
Convert DXF files to 3MF format.OBJ to 3MF
OBJ is a plain-text 3D geometry format from Wavefront.PLY to 3MF
Convert PLY files to 3MF format.GLB to 3MF
Convert GLB files to 3MF format.GLTF to 3MF
Convert GLTF files to 3MF format.FBX to 3MF
Convert FBX files to 3MF format.DAE to 3MF
Convert DAE files to 3MF format.3DS to 3MF
Convert 3DS files to 3MF format.X to 3MF
Convert X files to 3MF format.AMF to 3MF
AMF is an XML format for 3D printing standardized as ISO/ASTM 52915.OFF to 3MF
Convert OFF files to 3MF format.X3D to 3MF
Convert X3D files to 3MF format.
Frequently asked questions
Still have questions? Contact support.
Is it free to convert STL to 3MF?
Yes, converting STL to 3MF is completely free. You can convert files up to 100 MB and up to 10 files per batch, and no signup or account is required.
Will converting STL to 3MF affect the quality?
Our converter preserves the original quality of your STL files during the conversion to 3MF. The output maintains formatting, layout, and visual fidelity as closely as possible.
Can I convert multiple STL files to 3MF at once?
Yes. You can convert up to 10 STL files to 3MF in a single batch. Drag and drop all the files at once, and Novitora processes them together.
Is my data safe when converting STL to 3MF?
Your files upload to Novitora servers over an encrypted TLS connection and are automatically deleted 2 hours after upload. Data is stored in the EU (Frankfurt), and we follow SOC 2-aligned security practices.
What devices can I use to convert STL to 3MF?
Novitora works in any modern web browser on desktops, laptops, tablets, and phones. There is nothing to install: open the page, upload your STL file, and download the 3MF.