Updated 2026-09-05 · 5 min read
How do I print a 3MF file?
Quick answer
Upload the .3mf file directly to our upload tool, the same way you would upload an STL. We read 3MF files and price them right away, no conversion needed on your end. A 3MF saved as a full slicer project can hold more than one part arranged on a plate: if you only want one of them, open it in a slicer first and save out just that part. Otherwise, upload it as is, pick a color, and order.
Upload your file and get one printed for you.
Ready to print your 3MF?
- Upload the .3mf file, the same way you would an STL.
- See the size and price right away.
- Pick a color and check out.
You have a file ending in .3mf, maybe saved out of a slicer like Bambu Studio, PrusaSlicer, or Orca, or downloaded from a model site. It works here the same way an STL does: no conversion step, no extra software.
Upload it the same way you would an STL
Drop the .3mf into our upload tool. It reads the file, measures the real size, and shows you a price right away, exactly like an STL does. See our full guide to what file types we take for the two we read today.
A 3MF can carry more than a shape: the real world size in a stated unit, and sometimes the color a designer used. We still print every order in one color that you pick at checkout, so a multi-color 3MF prints in whichever single color you choose, not the mix shown in a slicer preview.
When a 3MF holds more than one part
A 3MF saved as a full slicer project, sometimes called a print profile, can hold several parts arranged together on one or more plates, the way someone set them up on their own printer. If you only want one of those parts, open the file in a free slicer program, pull out just the part you want, and save that as its own file before you upload it here.
If you are not sure whether your file has one part or several, upload it anyway. Our tool shows you what it read, and you can tell us if something looks off.
| File type | Do we read it here? | What you get |
|---|---|---|
| .stl | Yes | An instant price, right after you upload |
| .3mf | Yes | An instant price, right after you upload |
| .step, .stp, .obj, and others | Not for an instant price | A hand off to a person for review, no price until they look |
Instant price or a person by hand, by file type.
From a 3MF file to a finished part
Step 1
Upload the .3mf file
Drop it into our upload tool, the same spot an STL goes.
Step 2
Check the size and price
Both show up right away, based on the real shape in the file.
Step 3
Pull out one part first, if needed
If the file is a multi-part slicer project and you only want one piece, save that piece out on its own before uploading.
Step 4
Pick a color and check out
Choose a material and color, then order. You still pick between PLA and PETG, our two materials. See PLA vs PETG if you are not sure which one fits your part.
Worth knowing
How big we can print in one piece
Our upload tool scales up to about 8.7 inches (222 mm) on the longest side, in one piece, the same limit an STL has. A 3MF with a part bigger than that needs to be split first, the same as any other file. See how to resize an STL and how to check dimensions for the same tools applied to a 3MF.
- Do I need to convert a 3MF to STL before uploading?
- No. Upload the .3mf as is. Our tool reads it directly.
- Will you keep the colors from my 3MF file?
- No. We print every order in one color, chosen at checkout, no matter how many colors the 3MF was set up with in a slicer.
- My 3MF download has several parts on one plate. What do I do?
- Open it in a free slicer, save out the one part you want, and upload that file. Or tell us when you upload and we will help sort it out.
- Is a 3MF bigger or smaller than an STL for the same part?
- Usually a bit bigger, since a 3MF can carry extra data like color and multiple parts alongside the shape. It does not change the price, which is based on the size of the printed part.
Common questions
- Do I need to convert a 3MF to STL before uploading?
- No. Upload the .3mf as is. Our tool reads it directly.
- Will you keep the colors from my 3MF file?
- No. We print every order in one color, chosen at checkout, no matter how many colors the 3MF was set up with in a slicer.
- My 3MF download has several parts on one plate. What do I do?
- Open it in a free slicer, save out the one part you want, and upload that file. Or tell us when you upload and we will help sort it out.
- Is a 3MF bigger or smaller than an STL for the same part?
- Usually a bit bigger, since a 3MF can carry extra data like color and multiple parts alongside the shape. It does not change the price, which is based on the size of the printed part.
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