Free Online 3MF Viewer
Preview 3MF project files from Bambu Studio, PrusaSlicer, Cura and Orca Slicer in your browser, and check the size and volume of every model.
How it works
- Drag your .3mf file into the viewer or click “Choose file”.
- All objects on the plate are loaded together. Rotate, pan and zoom to inspect them.
- Check the size, volume and estimated filament weight.
What is a 3MF file?
3MF (3D Manufacturing Format) is a modern 3D printing format. Unlike STL, it can store several objects, units, colors and print settings in one file, which is why Bambu Lab and Prusa use it.
3MF vs STL
3MF files are smaller and more complete than STL. If a website or tool only accepts STL, convert your 3MF with our STL converter.
Frequently asked questions
Is my file uploaded?
No. Everything runs in your browser. Your file is read locally and never leaves your device, so it is safe for private and paid models.
Is it free?
Yes, it is 100% free, with no sign-up, no watermark and no file limit.
Does it open Bambu Studio projects?
Yes. The viewer loads the geometry of all objects in the 3MF file. Print settings and plate data are ignored.
Why are colors not shown?
The viewer focuses on geometry and shows the model in one color. You can change that color in the View panel.
How do I convert 3MF to STL?
Open your file in our STL converter, choose STL and download it.