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← 3D Model Converter

Convert VTK to STL online

Drop a .vtk file to turn it into STL. You see the model in 3D before converting, and the file never leaves your device.

What is kept when converting VTK to STL

Geometry: Kept
Materials: Lost
Textures: Not in VTK
Animation: Not in VTK
Scene hierarchy: Not in VTK

About VTK

Visualization Toolkit (.vtk, .vtp)

VTK (.vtk, .vtp) comes from the Visualization Toolkit and ParaView: scientific meshes, often with per-point colors.

About STL

Stereolithography

STL describes only the surface of a model as triangles — no colors, materials or textures. It is the default format for 3D printing and slicers.

How it works

01
Drop the .vtk file (with its textures or .bin/.mtl files, if any).
02
Check the model in the 3D preview; STL is already selected.
03
Click “Convert” and the .stl file downloads.

Questions

Is the VTK to STL converter free?+

Yes, without limits, sign-up or watermark.

Is my VTK file uploaded?+

No. The VTK file is read and converted in your browser; nothing is sent to a server.

Why are textures missing after converting VTK?+

Textures stored as separate files must be selected together with the model. STL keeps them only if the format supports textures.

Convert VTK to other formats

VTK → GLB VTK → glTF VTK → OBJ VTK → PLY VTK → USDZ

Convert other formats to STL

GLB → STL glTF → STL FBX → STL OBJ → STL PLY → STL DAE → STL 3MF → STL USDZ → STL 3DS → STL VOX → STL VRML → STL 3DM → STL AMF → STL LWO → STL KMZ → STL MD2 → STL SVG → STL

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