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Local viewer

3MF Viewer

Open and inspect .3mf files directly in your browser with a private local 3MF 3D viewer.

Processed locally
No signup required
Files stay on your device
Isometric 3MF file illustration for Modelfy's local 3MF viewer

Private local preview

Upload a local file to inspect it here.

Browser-local workflow

How this tool works

  1. Step 1

    3MF file

    Choose a 3MF file from this device.

  2. Step 2

    Local parser

    The browser reads the supported file data locally.

  3. Step 3

    Interactive preview

    Orbit, inspect, and review the loaded model in this tab.

Direct answer

Can I open 3MF files in my browser?

Yes. This 3MF viewer parses and renders a single file locally in your browser, so the model is not uploaded to Modelfy. 3MF files up to 25 MB are accepted. Current boundary: The current 3MF writer exports one triangle mesh with millimeter units, without materials, colors or print settings.

Current browser support

Limits to know before opening the file

  • The current 3MF writer exports one triangle mesh with millimeter units, without materials, colors or print settings.

Practical workflows

When this format is a useful fit

  1. 013D print project exchange
  2. 02Color/multi-material printing
  3. 03Slicer-ready model delivery

Why choose this online 3MF viewer

Local 3MF file parsing

The selected 3MF model file is decoded on your device and is not uploaded to Modelfy. The page itself still loads normal website code and static assets.

Inspect 3D Manufacturing Format geometry

Orbit, zoom, and pan around the loaded model to review geometry for 3d print project exchange before using it in another application.

3MF support boundary

Current browser implementation: The current 3MF writer exports one triangle mesh with millimeter units, without materials, colors or print settings.

Continue a 3MF workflow

Use the related tools to compare other viewers or move supported 3MF geometry into a documented target format.

How to open a 3MF file online

  1. 01

    Upload your file

    Drag and drop a 3MF file into the viewer, or click Upload to pick one from your device.

  2. 02

    Inspect in 3D

    After the 3MF loader finishes, drag to rotate, scroll to zoom, and right-click to pan while checking the model for 3d print project exchange.

  3. 03

    Continue your workflow

    Review the documented boundary before continuing: The current 3MF writer exports one triangle mesh with millimeter units, without materials, colors or print settings.

About the 3MF file format

3D Manufacturing Format

3MF was created by the 3MF Consortium (Microsoft, HP, Prusa, Ultimaker, and others) as the successor to STL for additive manufacturing. It is a ZIP-based container holding an XML mesh description with real units, colors, materials, and printer metadata.

Modern slicers like PrusaSlicer, Bambu Studio, and Cura prefer 3MF because a single file can carry the full print project.

Format reference: 3MF Consortium core specification

Strengths

  • Real units and manifold guarantees
  • Color and material support
  • Native format of modern slicers

Commonly used for

  • 3D print project exchange
  • Color/multi-material printing
  • Slicer-ready model delivery

Frequently asked questions

Is my 3MF model file uploaded to a server?

The selected 3MF model file is processed by the browser and is not uploaded to Modelfy. Website code and static assets still load over the network like a normal web page.

Is the 3MF viewer free to use?

Yes. The browser viewer, converter, and local 3D text tool require no account and add no watermark. Input limits vary by format, up to 50 MB; AI model generation is a separate credit-based product.

What is the maximum file size?

3MF inputs up to 25 MB are accepted. The format-specific limit keeps browser-local parsing bounded; actual processing also depends on available memory, model complexity, and device performance.

Is 3MF better than STL for printing?

3MF stores explicit units, avoids the leaky triangle-soup pitfalls of STL, and can embed colors and print settings, so most modern slicers recommend it. Converted files from this tool use millimeter units.

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AI 3D generation

From a single image to a production-ready 3D model

These browser tools stay free for viewing and converting files you already have. When the model does not exist yet, Modelfy generates a textured mesh from one reference image — the first one is free.

Try the AI 3D generator