STL to GLTF Converter

STL to GLTF Converter

Convert 3D-printable STL files to glTF 2.0 for embedding in web viewers, three.js, Babylon.js, and Google Model Viewer. Showcase your 3D printing models online with interactive 3D previews. No software installation required.

Drag & drop your STL file here

or click to browse (Max 50MB for free users)

Supported: .stl files only

Why Convert STL to GLTF?

STL is for printing. glTF is for showing. Convert your models into interactive 3D viewers anyone can access online.

Web Showcase

Convert STL models from Thingiverse or Printables to glTF for interactive web viewing with three.js, Babylon.js, or Google Model Viewer.

AR Preview

glTF is supported by Apple AR Quick Look and Android Scene Viewer. Let customers preview your 3D-printable products in augmented reality before purchase.

Compact & Efficient

glTF binary encoding is more compact than ASCII STL. Convert to GLB for single-file delivery — ideal for e-commerce, portfolios, and online sharing.

Material Addition

STL is geometry-only. After converting to glTF, assign PBR materials in your web framework — metallic, roughness, and color bring models to life online.

About STL to GLTF Conversion

Why convert STL to GLTF?

STL is the universal 3D printing format, a simple triangle list optimized for slicers. glTF 2.0 is the universal web 3D format. Designed for efficient transmission and rendering in browsers, mobile devices, and AR applications. Converting STL to glTF makes your 3D-printable models accessible to anyone with a web browser: embed interactive viewers, create product configurators, or deploy AR product previews. No plugins, no downloads, just open a URL.

What is preserved during conversion?

Mesh geometry (triangles) and face normals are fully preserved and written as glTF mesh primitives. Face normals are converted to per-vertex normals for smooth web rendering. STL does not contain colors, textures, UVs, or materials. The glTF output will be a monochrome mesh that you can enhance with PBR materials in three.js, Babylon.js, or your web framework. Draco compression is available for large models to reduce file size for web delivery.

How to use the converted GLTF file

Load the glTF with three.js GLTFLoader, Babylon.js SceneLoader, or the model-viewer web component for instant 3D viewing. For single-file hosting, convert to GLB using our GLTF to GLB converter. For e-commerce, upload the GLB to Shopify or reference it in Google Merchant Center. For custom viewers, use any WebGL framework. glTF is the standard interchange format for web 3D.

How to Convert STL to GLTF

Three steps to transform your 3D-printable STL files into interactive web-ready glTF models.

1

Upload Your STL File

Drag and drop your .stl file. Both binary and ASCII STL are supported. Free tier: up to 50MB with 3 daily conversions.

2

Convert to glTF

Our cloud engine normalizes normals and writes glTF 2.0 output. Enable Draco compression for web-optimized file sizes up to 90% smaller.

3

Embed & Share Online

Download your glTF and embed in websites with three.js, model-viewer, or convert to GLB for CDN hosting. Files auto-delete within 1 hour.

Related Converters

Converting STL to web formats? These converters complete your pipeline.

STL to OBJ
Convert STL to editable OBJ for Blender, Maya, ZBrush editing.
STL to FBX
Convert STL to Autodesk FBX for Unreal Engine and Unity pipelines.
GLTF to GLB
Pack your glTF into a single binary GLB for CDN and web delivery.
OBJ to GLTF
Convert OBJ to glTF with PBR materials for web and AR.
FBX to GLTF
Convert Autodesk FBX to glTF for web, AR, and real-time engines.
FAQ

Frequently Asked Questions

Upload your .stl file and click Convert to GLTF. Our engine writes glTF 2.0 format. The output loads into three.js (GLTFLoader), Babylon.js (SceneLoader.Append), or the model-viewer web component for instant browser-based 3D viewing. Embed in any HTML page no plugins needed.
Yes. You can convert up to 3 files per day for free with files up to 50MB each. For unlimited conversions, 500MB files, Draco compression, and batch processing, upgrade to Pro.
Yes. After converting STL to glTF (and optionally to GLB for single-file delivery), your model can be viewed in AR on iOS via Apple AR Quick Look and on Android via Scene Viewer. This enables instant augmented reality previews of your 3D printing designs.
No. STL is a monochrome format with no color, texture, or material data. The glTF output will be an untextured mesh. Use three.js, Babylon.js, or your web framework to assign PBR materials (baseColor, metallic, roughness) programmatically for rich visual quality online.
glTF is supported by three.js, Babylon.js, Google Model Viewer, Apple AR Quick Look, Android Scene Viewer, Facebook 3D Posts, Shopify, Unity, Unreal Engine, Godot, Blender, Sketchfab, and virtually every web and real-time 3D platform.
Absolutely. All uploads use TLS 1.3 encryption. Files are processed in isolated cloud environments and auto-deleted within 1 hour. Read our Privacy Policy for full details.
Free users: 50MB. Basic: 100MB. Pro: 500MB. Team: 1GB. Draco compression can dramatically reduce the output size for web delivery great for large detailed prints turned into web assets.