Free 3D model converter
18 formats in, 9 formats out

Convert STEP, OBJ, FBX, STL, glTF, PLY, 3DS, IFC and Rhino models from one format to another.

Everything runs in your browser, so the file never leaves your computer.

Drop a 3D file here or choose a file. STEP, IGES, OBJ, FBX, STL, glTF, PLY, 3DS, DAE, 3MF, IFC, 3DM and more. For a model made of several files, select them all or drop one .zip.

Convert to

Free, no sign-up. Your file stays on your computer. It is opened and converted in this browser tab and is never uploaded to us or anyone else.

No upload, no sign-up and no watermark
3D preview, size and triangle count before you convert
CAD, BIM, mesh and 3D printing formats in one place

How it works

How to convert a 3D model

3 steps, and the file never leaves your computer.

1. Add your model

Drop the file on the converter or click to choose it. Models made of several files, such as OBJ with MTL and textures or glTF with BIN, are opened together or from one .zip.

2. Check it in 3D

Rotate and zoom the preview to check that the model arrived whole. The panel shows the triangle count, the size and whether the mesh is watertight.

3. Choose a format and download

Pick one of 9 output formats and click Convert and download. Files are written in your browser and saved to your downloads folder.

More free tools

Other free 3D and CAD tools

Each one runs in your browser, like this one.

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IFC viewer

Open IFC files from Revit, ArchiCAD and Tekla. Filter by element and level, check properties and measure.

Open the IFC viewer

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Revit viewer

Open .rvt files without Revit: converted to IFC by Autodesk, then viewed with levels and properties.

Open the Revit viewer

Monitor showing a BIM model of an office building with steel in blue and ducts in orange, a white hard hat in front

BIM viewer

Review BIM models from Revit, Archicad and Tekla without a licence: levels, properties, measuring.

Open the BIM viewer

Laptop on an oak desk showing a CAD floor plan with coloured layers, next to a rolled drawing

DWG viewer

Open AutoCAD DWG and DXF drawings online: every layout, layers on and off, zoom and pan.

Open the DWG viewer

Laptop showing a CAD drawing of a mechanical part outline with coloured layers next to a laser-cut aluminium version of the part

DXF viewer

Open DXF files online: every layout, layers on and off, zoom, then save as PDF or SVG.

Open the DXF viewer

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DWG to PDF

Plot AutoCAD drawings to PDF: layouts 1:1 with title blocks, line weights and hatches.

Open DWG to PDF

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Normal map generator

Make normal, height, roughness and AO maps from any image, seamless if you need it.

Open the normal map generator

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PDF to DWG

Turn PDF drawings into CAD lines for AutoCAD: lines, text and layers, at drawing scale.

Open PDF to DWG

SVG to DXF

Convert SVG to DXF for CAD, laser cutting and CNC: exact lines, layers, real size.

Open SVG to DXF

PNG to DXF

Trace PNG and JPG images into DXF shapes for laser cutting, CNC and CAD.

Open PNG to DXF

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DXF converter

Open DXF drawings and save them as PDF or SVG, with layouts, line weights and hatches.

Open the DXF converter

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Before and after slider

Make a before and after slider, video or image from two photos, for listings, Reels and your website.

Open the before and after maker

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STEP viewer

Open STEP and IGES files from SolidWorks, Fusion 360 and Inventor. See every part and measure.

Open the STEP viewer

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3D viewer

Open 18 kinds of 3D file online, from STEP and FBX to GLB and IFC, with parts and measuring.

Open the 3D viewer

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GLB viewer

Open GLB and glTF files with their materials and textures, size and triangle count.

Open the GLB viewer

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OBJ viewer

Open OBJ files with their MTL materials and textures, and save as STL, GLB or STEP.

Open the OBJ viewer

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SolidWorks viewer

Open SolidWorks part files without SolidWorks, then save them as STL, STEP or GLB.

Open the SolidWorks viewer

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STL viewer

View STL files for 3D printing with size, volume, weight and a watertight check.

Open the STL viewer

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STEP to STL

Convert STEP and STP files from SolidWorks, Fusion 360 and Inventor to STL for 3D printing.

Open STEP to STL

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3MF to STL

Convert 3MF files from Bambu Studio and PrusaSlicer to STL, or STL to 3MF.

Open 3MF to STL

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Image to STL

Turn PNG and JPG images into STL or OBJ reliefs and lithophanes for 3D printing.

Open image to STL

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STL converter

Convert 3D files and images to STL for 3D printing, with a watertight check.

Open the STL converter

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OBJ converter

Convert STL, FBX, STEP, glTF and 3DS to OBJ with materials, or OBJ to other formats.

Open the OBJ converter

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FBX converter

Convert FBX files from 3ds Max, Maya and Blender to OBJ, GLB or STL.

Open the FBX converter

Choosing a format

Which 3D format to convert to

Pick the format by what happens to the model next.

For 3D printing: STL

Every slicer reads STL. It stores only the shape, with no colour and no units, so check the size in the slicer before you print.

To move a model between programs: OBJ

Almost every 3D program opens OBJ with its materials and textures. It does not store animation, cameras or units.

For the web and AR: GLB

GLB is the binary form of glTF. It packs the model, materials and textures into one small file for three.js, model viewers and AR on phones.

For CAD programs: STEP

SolidWorks, Fusion 360, Inventor and FreeCAD all open STEP. A STEP made from a mesh has flat faces instead of true curves, so it can be measured but not easily edited.

Supported formats

Every format the converter opens and saves

18 formats open and 9 save, STL and PLY in both binary and text form. Heavy readers for CAD and BIM files load only when you open such a file.

STEP.step .stp

CAD solids from SolidWorks, Fusion 360, Inventor, Creo, CATIA and Onshape.

OpensSaves

IGES and BREP.igs .iges .brep

Older CAD exchange formats for surfaces and solids.

OpensDoes not save

IFC.ifc

BIM models from Revit, ArchiCAD, Tekla and Vectorworks.

OpensDoes not save

OBJ.obj .mtl

The most widely read mesh format, with materials and textures.

OpensSaves

FBX.fbx

Autodesk format of 3ds Max, Maya and game engines.

OpensDoes not save

STL.stl

The 3D printing format, in binary or ASCII text.

OpensSaves

glTF and GLB.gltf .glb

The web and AR format, with materials packed in.

OpensSaves

PLY.ply

3D scan and photogrammetry meshes, in binary or text.

OpensSaves

3DM.3dm

Rhino models.

OpensSaves

3DS.3ds

Older 3ds Max models.

OpensDoes not save

3MF and AMF.3mf .amf

3D printing project formats from slicers.

OpensDoes not save

DAE, OFF, VRML, FCStd.dae .off .wrl .fcstd

Collada from SketchUp, research meshes, VRML and FreeCAD documents. OFF can also be saved.

OpensSaves

Beyond file conversion

When you need a model, not a file format

People use this converter to get a model into the right program. When the model is missing, wrong or not good enough to show a client, that is our work.

3D modeling

Accurate 3D models from CAD drawings, PDFs, sketches and scans.

See 3D modeling

Architectural visualization

Photoreal images and films of buildings, from your BIM or CAD model.

See architectural visualization

3D product rendering

Product images for catalogues and web shops, from your CAD files.

See product rendering

3D converter FAQ

Questions about converting 3D files

What converts cleanly, what does not, and why.

Ask us a question

Does the converter work on a phone or tablet?

Yes, in any current browser on iPhone, iPad or Android. Your device does the work, so very large models, such as a whole building in IFC, open faster on a laptop or desktop with more memory.

What is lost when I convert a 3D model?

Only what the target format cannot store. STL drops colour and materials, OBJ drops animation and units, and every mesh format turns CAD curves into small flat triangles. The shape itself is kept exactly.

Can I convert a mesh back into a CAD model with real curves?

Not automatically. The converter can save any mesh as STEP, and CAD programs open it as a solid with flat faces. Turning those facets back into true curves and editable features means rebuilding the model, which is 3D modeling work.

Which formats does it not support?

Closed formats that only their own program can read: Revit (.rvt), SketchUp (.skp), Blender (.blend), 3ds Max (.max), Cinema 4D (.c4d), ArchiCAD (.pln) and SolidWorks (.sldprt). Export IFC, OBJ, FBX, STEP or STL from those programs first, and the converter tells you which menu to use when you drop such a file.

Can it convert DWG or DXF drawings?

Not yet. DWG and DXF are mostly 2D drawings, and this converter reads 3D models. For a 3D solid, export STEP or STL from your CAD program and convert that.

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