Convert G-code to 3MF — Reconstruct a Modern Mesh from a Toolpath
Rebuild the shape a G-code file prints and save it as a 3MF you can open in Bambu Studio, PrusaSlicer or OrcaSlicer. The 3MF holds one uncolored mesh in millimeters, not a sliced plate and not your old print settings.
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Why Convert GCODE to 3MF?
A .gcode file tells a printer how to move, layer after layer; it contains no model a slicer can rearrange, scale or slice again. If all you have is the print file, perhaps from a shared plate or an old SD card, you need a mesh before you can change anything about how the part prints.
This pair runs through the same G-code parser as our STL converter. It follows the extruder value through the file and keeps the segments where filament is pushed out, sets travel and retraction moves aside, and ignores the start and end scripts whenever the slicer wrote layer markers. Those segments are drawn into a voxel grid, a surface is fitted around them, and the mesh library trimesh writes the result straight into a 3MF package declared in millimeters, with no intermediate format in between.
Choosing 3MF over STL here buys you a stated unit, so the slicer imports the part at the right scale without guessing, and a compressed package that Bambu Studio and OrcaSlicer users tend to keep in their project folders anyway. What 3MF could carry but this file will not: colors, separate parts, plate layout and print profiles. The reconstruction reads none of that from the G-code, so you get a single object.
Bambu Studio and OrcaSlicer also write .gcode.3mf files, and searches such as gcode.3mf often come from people holding one. Those are sliced plate packages meant for the printer. Our output is not one of them: it is a model 3MF that must be sliced again before it prints. The FAQ below explains what to do if you have a .gcode.3mf and want its model back.
How to Convert GCODE to 3MF
- Locate the print file you want to rebuild. Text G-code with a .gcode, .g or .gco extension is accepted, as are FlashForge .gx and Prusa .bgcode files.
- If the G-code is locked inside a Bambu or Orca .gcode.3mf, open that package with any ZIP tool and copy out the .gcode file from its Metadata folder (typically plate_1.gcode).
- Upload the file above. Several print files can go in one batch, and each returns its own 3MF.
- Download the 3MF and import it into your slicer. The mesh keeps the coordinates it had on the original printer's bed, so use the slicer's arrange or center command if it lands off to one side.
- Delete any support or brim that came along with the reconstruction, pick your own profile, and slice.
Key Conversion Features
- Writes the reconstructed mesh directly to a 3MF package that declares millimeter units
- Leaves out non-printing motion: travel, retraction and the purge line in the start script
- Decodes Prusa binary .bgcode (deflate, heatshrink and MeatPack blocks) and skips the header of FlashForge .gx files
- Works without slicer comments too; if layer markers are missing, the start and end moves simply stay in the mesh
- Produces one object you can scale, cut or re-slice in any slicer that opens 3MF
Video Tutorial
Pro tip: convert GCODE to 3MF without installing anything! 💡 🔗 https://miconvert.com/en/gcode-to-3mf?utm_source=youtube&utm_medium=social&utm_campaign=gcode-to-3mf ⏱️ Timestamps: 0:00 Intro 0:06 F
Frequently Asked Questions
Can I print the converted 3MF straight away?
Not without slicing it again. The file stores only geometry; the speeds, temperatures and toolpaths in your G-code are not written into it. Load it in your slicer, choose a printer and filament profile, slice, and send the new G-code.
What do I do with a .gcode.3mf file?
It is already a 3MF package, so this page will turn it away, since 3MF to 3MF is not a conversion we offer. To rebuild its model, either pull the .gcode out of its Metadata folder and upload that here, or use our 3MF to STL converter, which falls back to the embedded G-code when the package has no readable mesh.
How do I convert 3MF back to G-code?
That direction is slicing, not file conversion: the slicer has to plan every move for your printer, nozzle and material. Open the 3MF in PrusaSlicer, Bambu Studio, OrcaSlicer or Cura and export G-code from there.
Will a multicolor or AMS print keep its colors?
No. Filament changes are not followed, so every color lands in the same plain mesh, and the prime tower that multi-material prints use comes along as an extra block. Re-assign colors to the reconstructed part in your slicer.
How close is the 3MF to my original model?
Close in size and placement, rougher in surface detail. Positions are the printer's own millimeters, but the surface is rebuilt on a grid no finer than 0.3 mm, coarser for big prints, and G2/G3 arcs turn into straight segments. Treat the result as something to reprint or remodel from, not as a substitute for the source CAD.
Do Prusa binary .bgcode files work here?
Yes. A .bgcode is decoded back to text G-code on the server first, including its compressed and MeatPack-encoded blocks, and then reconstructed like any other file. Only files that Prusa Connect encrypted for a single printer cannot be read.
Where is my file processed, and how long is it kept?
On our conversion servers. The uploaded G-code is removed right after the job ends, and the finished 3MF is deleted by a cleanup task roughly four hours later, so download it promptly.