3MF to STL Converter | STL to 3MF Online

Convert 3MF to STL in your browser: one STL per object or plate, or one merged file. Also packs STL files into a 3MF. Works with Bambu and Prusa files.

Also known as: 3mf to stl · 3mf to stl converter · convert 3mf to stl online · stl to 3mf · stl to 3mf converter · bambu studio 3mf to stl · export stl from 3mf · split 3mf into stl files · 3mf file converter · 3mf to stl free

file converters

developer utilities

converters

3MF Input

Drop a 3MF file here, or click to browse

Bambu Studio, OrcaSlicer, PrusaSlicer, Cura and CAD 3MF files, up to 1 GB. Read in your browser and never uploaded.

STL Output

Your STL files will appear here

Open a 3MF file to preview its objects in 3D, pick which ones to keep, and download one merged STL, one STL per object or one STL per plate, all in millimeters.

About 3MF to STL Converter

3MF to STL Converter is used to turn 3MF print projects from Bambu Studio, OrcaSlicer, PrusaSlicer and CAD tools into plain STL files that any slicer, print service or CAD program can open. It reads objects, components, build transforms, units and plates, exports one STL per object or plate or a single merged file, and packs STL files into a 3MF. Files never leave your browser.

Key Features

Reads core 3MF and the production extension, including Bambu Studio and OrcaSlicer projects that keep each object in its own 3D/Objects file
Exports one merged STL, one STL per object or one STL per Bambu plate, bundled in a ZIP when there is more than one file
Applies component and build item transforms, re-winds mirrored parts and converts any 3MF unit to millimeters
Leaves out modifiers, negative volumes and support blockers or enforcers by default, so slicer helper shapes stay out of the print
Packs binary or ASCII STL files into a valid 3MF with welded vertices, one named object per file, arranged in a row
3D preview with a color per object, plus a plain text report of every object, plate and file

Use Cases

Pull one part out of a MakerWorld project to print it on a Prusa, Creality or Elegoo printer that runs a different slicer
Send a print shop or a customer plain STL files when they cannot open a Bambu Studio project
Split a multi-plate Bambu Lab X1 Carbon or P1S project into one STL per plate for a print farm queue
Bring a 3MF into Tinkercad, Fusion or Blender workflows that expect STL
Bundle a set of STL parts into one 3MF before uploading to Printables or emailing a project

Supported Formats

3MF (core and production extension)

Bambu Studio and OrcaSlicer projects

PrusaSlicer projects

STL (binary)

STL (ASCII)

ZIP of STL files (output)

Related Keywords

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Why does my 3MF turn into an STL with extra shapes or parts in the wrong place?

A slicer project stores more than the printable mesh. Bambu Studio, OrcaSlicer and PrusaSlicer keep modifiers, negative volumes and support blockers as extra meshes, and Bambu lays out multi-plate projects side by side in one coordinate space, so plate 2 sits about 300 mm to the right of plate 1. This converter leaves helper shapes out unless you include them and centers each exported file on the bed. A negative volume is a cut the slicer makes while slicing, so the STL holds the uncut part. STL has no units, so every file is written in millimeters.

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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Frequently asked questions

What is 3MF to STL Converter used for?

Convert 3MF to STL in your browser: one STL per object or plate, or one merged file. Also packs STL files into a 3MF. Works with Bambu and Prusa files.

Is 3MF to STL Converter free to use?

Yes. 3MF to STL Converter is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use 3MF to STL Converter?

No. 3MF to STL Converter works immediately in your browser with no signup, login, or email address required.

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