# Conversion of .vtk polygon data file to .stl file format
**URL:** https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952
**Category:** Support
**Tags:** file-formats
**Created:** [March 1, 2022, 1:05pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952 "2022-03-01T13:05:55Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@KALEEMULLAHJANKHAN](https://discourse.vtk.org/u/KALEEMULLAHJANKHAN)
#### Post date: [March 1, 2022, 1:05pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/1 "2022-03-01T13:05:55Z")
Hello Team,
I am a beginner and blocked in my research. I kindly need help of anyone here.
I have a .vtk file format (having Polydata as “26.3162314062377 2.03114038667601 7.867” and Polygon data as “34 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33”) and I want to convert it to .stl file format. Kindly share the script for its conversion or any other way to overcome this issue.
Thanks and kind regards
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 1, 2022, 1:12pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/2 "2022-03-01T13:12:37Z")
Open in ParaView and save as .stl
[https://www.paraview.org/download/](https://www.paraview.org/download/)
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### Author:  [@KALEEMULLAHJANKHAN](https://discourse.vtk.org/u/KALEEMULLAHJANKHAN)
#### Post date: [March 1, 2022, 1:29pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/3 "2022-03-01T13:29:45Z")
Thanks for the response. I already have done it but I could not visualize that .stl file
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 1, 2022, 1:32pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/4 "2022-03-01T13:32:57Z")
please share your .vtk file
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### Author:  [@will.schroeder](https://discourse.vtk.org/u/will.schroeder)
#### Post date: [March 1, 2022, 1:33pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/5 "2022-03-01T13:33:56Z")
I believe stl presumes triangles, do the polygons need triangulation ?
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### Author:  [@KALEEMULLAHJANKHAN](https://discourse.vtk.org/u/KALEEMULLAHJANKHAN)
#### Post date: [March 1, 2022, 1:37pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/6 "2022-03-01T13:37:05Z")
I now successfully visualized the .stl file. actually I need to convert that .stl file to .off file format to mesh it with CGAL, but this .stl file could not read by meshio for conversion
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### Author:  [@KALEEMULLAHJANKHAN](https://discourse.vtk.org/u/KALEEMULLAHJANKHAN)
#### Post date: [March 1, 2022, 1:40pm UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/7 "2022-03-01T13:40:35Z")
[dfn.vtk](https://discourse.vtk.org/uploads/short-url/kOmH3ioOppR5cDzKDiAZLg8TEj4.vtk) (62.0 KB)
This is my .vtk file sir
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 2, 2022, 8:34am UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/8 "2022-03-02T08:34:59Z")
ParaView save it in stl perfectly.
[testd.stl](https://discourse.vtk.org/uploads/short-url/vFxFZfq2lP7fPPrCoSihhdZqWz2.stl) (66.9 KB)
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### Author:  [@KALEEMULLAHJANKHAN](https://discourse.vtk.org/u/KALEEMULLAHJANKHAN)
#### Post date: [March 3, 2022, 4:30am UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/9 "2022-03-03T04:30:16Z")
Yes sir, Thanks. I have visualized it. I needed .stl to further process it to .off format but the main problem now is that I cannot convert this .stl to triangulated .off format.
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 3, 2022, 7:54am UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/10 "2022-03-03T07:54:41Z")
> [@KALEEMULLAHJANKHAN](#):
>
> this .stl to triangulated .off format.
Afaik, VTK can not write to .off format. Cant help you there.
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [June 13, 2024, 11:09am UTC](https://discourse.vtk.org/t/conversion-of-vtk-polygon-data-file-to-stl-file-format/7952/11 "2024-06-13T11:09:32Z")
A post was split to a new topic: [modify stl with clip](https://discourse.vtk.org/t/modify-stl-with-clip/14037)