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I need to shrink an STL file below the 25 MB threshold, so I can open it in TinkerCad. I don't care about quality, I just need it shrunk.

How can I do this?

Screenshot of error

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    $\begingroup$ We can't perform any services for you I'm afraid, so please don't ask. We can only suggest methods and solutions. I have appropriately amended the question for you. Also, please don't link links that require login as this could be construed as spam/phishing/etc. $\endgroup$ – Greenonline Feb 27 at 3:35
  • $\begingroup$ a model that large will be a nightmare to edit using tinkercad.... $\endgroup$ – dandavis Feb 28 at 20:14
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If you have 3D software like Blender you can import your model and use the decimate modifier to lower the number of vertices and then re-export.

Here is a link to how you can do this: Simplify Geometry with the Decimate Modifier in Blender 2.9.

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    $\begingroup$ Meshmixer will also decimate models, if one finds Blender to be overwhelming. $\endgroup$ – fred_dot_u Feb 27 at 10:50

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