3MF to STL Converter is a free tool. Upload a 3MF file to this 3MF to STL converter, preview the model, then download the STL file; no sign-up and no credits, it runs in your browser.
Runs in your browser · your file is not uploaded · no sign-in needed
Configure your options
Your 3D Model Will Appear Here
Fill in the options on the left, then press the button. The work is done in your browser.
Relevant internal links based on this tool
Upload your image
Drag & drop your file here or click to browse
3MF to STL conversion turns a 3MF model into the STL format that most slicers and printers expect, since not every printer workflow reads 3MF. This suits anyone who received a 3MF file but needs STL for their setup. Upload the 3MF file, preview the model, check its size, then download the STL. It runs fully in your browser, so no sign-up and no credits are used, and colors from the 3MF are not kept.
Use the Upload a 3MF File field to add the model you want converted from your device, ready for a quick preview before conversion.
Check the 3D preview and the reported size before downloading, to confirm the shape and scale are what you expect from the original file.
Press Convert to STL and download the file, ready for a slicer or printer that does not read 3MF.
Some slicer versions and printer workflows only accept STL, so converting a 3MF file you downloaded or received lets you use it without switching software.
If you only need the geometry and not the color or material data stored in a 3MF, converting to STL gives a smaller, more widely compatible file to share with others.
STL stores shape only, so any color or multi-material information in the original 3MF is lost in the converted file, and you may need to reassign colors manually in your slicer.
It reads the shape data inside a 3MF file and saves it as an STL file, which is the shape-only format most slicers and printers expect.
No. It runs fully in your browser, so no account is needed and no credits are used, and the file is never uploaded to a server.
No. STL stores shape only, so any color or material data from the 3MF is not kept in the converted file.
3MF is a 3D printing file format that can store shape along with extra information such as color, materials and print settings, unlike STL, which stores shape only.
Older printer firmware and some slicer versions were built before 3MF became common, so they only read the simpler STL format, which has been a standard for 3D printing since the 1980s.
This tool converts 3MF to STL, so for the reverse direction you would need a slicer or 3D program that can export a 3MF from an STL model.
Convert between other 3D file formats if 3MF to STL is not what you need.
Turn a flat vector graphic into an STL file using a different source format.
Open your new STL file to check its size and shape before printing.
Check and fix common mesh problems in the converted STL before you print.
Your file stays on your device. It is not uploaded.