Convert 3MF project files to universal STL models: extract clean geometry, split multi-part meshes into a ZIP archive, and adjust print bed orientation for Cura and any 3D printer.
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Convert 3MF project files from MakerWorld, Bambu Studio, or CAD software into standard STL format. Strip proprietary slicer profiles and printer presets to obtain a clean, watertight triangular mesh. Split multi-part assemblies into individual STL files inside a ZIP archive in one click, and fine-tune print orientation using interactive 3D rotation controls. All calculations run entirely in your local browser without uploading files.
DefaultY-up
Determines the 'up' axis of the exported model. Different 3D software uses different conventions. Selecting the wrong system may cause the model to lie on its side.
Convention used by OpenGL, Three.js, and most Web 3D engines. Choose this for models from web or game engines.
Convention used by Blender (default), 3ds Max, and some CAD software. Try this if the model appears sideways.
Default0°
Range-180° – 180°
Rotate the model around the X axis (degrees). Useful for correcting axis misalignment or print orientation.
Default0°
Range-180° – 180°
Rotate the model around the Y axis (degrees). Useful for correcting axis misalignment or print orientation.
Default0°
Range-180° – 180°
Rotate the model around the Z axis (degrees). Useful for correcting axis misalignment or print orientation.
DefaultRoot node transform
Choose how rotation is written to the exported model. Baking into vertices rewrites all vertex coordinates so every export format (including geometry-only formats such as STL and STEP) applies it consistently; root node transform keeps the original vertex coordinates, which is friendlier to animated or skinned models, but formats that ignore node transforms (such as STEP) won't apply the rotation.
Rotation is written into all vertex coordinates and applies consistently to every export format; geometry data is rewritten.
Rotation is written as a root node transform while vertex coordinates stay unchanged; better for skinned or animated models, but formats that ignore node transforms (such as STEP) won't apply it.
DefaultBinary STL
Choose the STL storage format. Both formats produce identical print results.
Smaller file, faster to load. Supported by Cura, PrusaSlicer, Chitubox and all major slicers. Recommended for 3D printing.
Plain text format, readable in any text editor for debugging. File size is ~4-6x larger than binary.
Export independent meshes as separate STL files packaged in a ZIP archive.
Drag and drop your 3MF project file into the browser for immediate local geometry parsing and 3D preview.
Select Binary STL and enable Split Multi-Part Mesh if you want separate components packaged into a ZIP archive.
Verify the physical millimeter dimensions and adjust rotation on the build plate if required.
Click Download to instantly save your slice-ready STL file or multi-part ZIP archive to your computer.
MakerWorld and Bambu Studio 3MF files are project packages bundled with machine-specific slicer profiles, multi-plate setups, and custom XML tags. Slicers like Ultimaker Cura or older PrusaSlicer versions cannot parse these vendor-specific tags. Converting to STL extracts the pure 3D surface mesh and removes incompatible slicer configurations so you can slice and print on any machine.
Yes. Turn on the Split Multi-Part Mesh option in the STL settings. If your 3MF model contains multiple distinct geometries, each part will be generated as an independent STL file packaged inside a downloadable ZIP archive. If this option is turned off, all components are combined into a single unified STL file.
No. The tool preserves exact physical dimensions in millimeters (mm) and maintains the standard Z-up 3D printing coordinate system. If the original model was designed at an angle, you can use the X, Y, and Z rotation sliders in the left panel to level the model on the build plate in real-time 3D view before downloading.
The STL format is a purely geometric standard storing triangular facets and normal vectors; it does not support color palettes, texture maps, or G-code print parameters. The solid geometry is preserved while colors and proprietary settings are stripped, allowing you to configure custom print settings in your slicer.
Binary STL is strongly recommended for 3D printing. Binary files are 4 to 6 times smaller, load much faster in Cura, PrusaSlicer, OrcaSlicer, Chitubox, and Lychee, and are universally supported. ASCII STL is only useful when you need to inspect raw vertex coordinates with a text editor.
3MF files use ZIP compression and indexed XML structures where shared vertices are stored only once. In contrast, standard STL files repeat coordinates for all three vertices of every triangle without data compression, naturally resulting in a larger file size on disk.
Yes. As long as the source 3MF geometry is a solid body, the resulting STL maintains manifold topology. You can inspect overall bounding box dimensions, triangle counts, and vertex density in the info panel before importing the file into your slicing software.
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