STL

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File Format
Name STL
Ontology
Extension(s) .stl

STL (StereoLithography) is a CAD/CAM format also used for downloadable object files to be sent to 3-D printers. It is based on the vertex coordinates of triangles, and can be saved in binary or ASCII form.

Contents

Identification

Windows will mis-identify STL files as Certificate Trust Lists, since those use the same extension.

STL files in ASCII form start with "solid" followed by a space and an optional name.

Binary form files have an 80-character header that is generally ignored, but shouldn't start with "solid" so that the file is not mistaken for the ASCII form.

Specs

Metaformat files

Sample files

Import/export info

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