theapk · ghostprint

Tag a 3D print.
Invisibly. Forever.

Pin a printed part to a specific order, printer, and timestamp — without changing the visual, dimensional, or surface finish of the part. Two independent watermark layers, both round-trip verifiable.

1 · Pick your file

Drop your .stl here or click to choose
Up to 50 MB · STL files only
no file selected

2 · Label this print

leave blank to use the current time
These details get stamped invisibly into the file. Later, anyone with the original can drop in a suspect part and check it matches.
waiting for file

3 · Download


    

  

  





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How this works

    
Three steps. Nobody can see the stamp. The original maker can prove it's theirs later.


    

      

        
1

        
You drop in your file

        
Any STL, up to 50 MB. We don't change how it looks, prints, or feels in the slicer.

      


      

        
2

        
We stamp two invisible marks

        
One rides along inside the print instructions. One hides in the shape itself, smaller than your nozzle can see. Both encode the order ID, printer, and time.

      


      

        
3

        
Anyone can check it later

        
If a knockoff shows up, drop the original STL back in and we'll tell you whether the part matches. Takes a few seconds. Works offline.

      

    

  


  

    
Pricing

    

      

        
CLI

        
$0

        
    
          
  • MIT-licensed Python
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  • Tag + verify offline
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  • No upload, no tracking
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  • Two watermark layers
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        View source →
        
pip install theapk-ghostprint (v0.1)

      

      

        
Maker

        
$9 / mo

        
    
          
  • Drag-drop web tool (this page)
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  • Hold master STLs in your account
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  • Verify suspect parts in the browser
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  • Up to 500 tags / month
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Studio

        
$49 / mo

        
    
          
  • Unlimited tags
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  • Multi-printer fleet dashboard
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  • API access + per-order webhook
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  • Bulk verify a print run
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