STL - Format Overview

May 15, 2025
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General Information

Format NameSTL
Long NameStereolithography
Extensions.stl
Internet Media Type (previously MIME)model/stl,model/x.stl-ascii,model/x.stl-binary
Common Use CasesAnimation, VFX, Games, Architecture
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What is the STL format, and what is it used for?

STL is a file format mostly used for 3D printing.

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Features supported by the STL format

FeatureSupported?
Morph TargetsNo
Rigid AnimationsNo
Skinned AnimationsNo
AnimationsNo
Free-Form SurfacesNo
Geometry CompressionNo
Quad MeshesNo
Basic 3D GeometryYes
PBR MaterialsNo
Transparent MaterialsNo
Vertex ColorsNo
MaterialsNo
Scene CompositionNo
Hierarchical Scene GraphNo
Scene NodesNo
Standardized FormatYes
Embedded TexturesNo
Multiple UV ChannelsNo
Normal MappingNo
Procedural TexturesNo
Texture CompressionNo
Texture TransformsNo
TexturingNo

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Converting and Optimizing STL Files

There are various ways to convert between STL files and other 3D formats. With RapidPipeline, you can easily convert and and optimize STL files, at scale.
It supports STL, as well as many other file formats (examples: 3dsMax, FBX, glTF, OBJ, PLY, STEP, USD, USDZ, VRM), at high quality.

Due to the aforementioned potential limitations of STL, in principle, one cannot always perfectly convert 3D data between STL and other formats. In the following, you can find format conversion guides between STL and the most important other formats, along with a rough score for compatibility of this workflow:

Converting STL to Other 3D File Formats

Converting Other 3D File Formats to STL

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Tools that can create STL files

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3D rendering applications that can consume STL files

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What's the best way to get STL files into my 3D applications?

Doing 3D conversion right, especially at scale, can be tricky, as 3D data is in general a rather complex (yet very powerful!) medium. This also applies to STL files - the conversion guide above gives a rough idea. Once you know what you would like to do, tools like RapidPipeline can help you perform the necessary steps, and to automate the process.

However, especially when introducing pipelines and workflows at scale in an enterprise context, it is usually good to rely on dedicated expertise, making sure you do not introduce any steps into your 3D workflow that are detrimental to the final output's quality, or that take your team too much time (and money).

If you're interested to hire dedicated expertise from the best in the field to help your company reach your goals fast and reliably, please do not hestitate to contact DGG. Being the creators of RapidPipeline, and ambassadors for open 3D standards for more than a decade, we have been building some of the world's most advanced 3D pipelines, having processed many millions of 3D assets. Therefore, our expertise will help you to reach your goals faster, at scale, and with the least possible friction, since we are focused on maximum interoperability. For a free initial consultation, get in touch here:

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