Optimize STL files online.
Up to 95% smaller.
STL (Stereolithography) — compress and optimize for the web.
Processed locally in your browser.
What is STL?
STL (Stereolithography) is the standard format for 3D printing. It stores raw triangle mesh data — vertices and face normals — without any material, color, or texture information. STL files come in ASCII or binary format.
Why optimize STL?
STL files are often very large, especially from CAD and 3D scanning workflows. They contain no materials and use a verbose data format. Optimization converts STL to compressed GLB — vertex welding removes duplicates (STL stores each triangle independently), meshopt compression reduces geometry further, and you can add materials in Trice Studio.
What gets optimized?
Trice converts STL to GLB with automatic vertex welding (STL stores duplicate vertices for each face), meshopt compression, quantization, and vertex reordering. A default PBR material is created.
How it works
Drop your .stl file
Drag and drop or click to select your STL model.
Auto-optimize
Trice compresses meshes, optimizes textures, and deduplicates geometry — all in your browser.
Download optimized file
Preview with before/after comparison and export a production-ready optimized GLB.
Frequently asked questions
A default PBR material is created for the mesh. After optimization, you can change materials, colors, and add textures in Trice Studio.
STL stores duplicate vertices for each triangle, so vertex welding alone can cut geometry data in half. Combined with meshopt compression and binary encoding, expect 70-90% file size reduction.
Yes. Both formats are supported. ASCII STL files see the largest compression gains since they start as text — often 90%+ reduction.
Yes. Free optimization runs in your browser and handles most files. For extremely large STL files (hundreds of MB), Pro server-side optimization provides more processing power.
Optimize other formats
More than an optimizer
Trice is a full 3D studio — optimize, edit materials, add hotspots, share and embed interactive 3D scenes on the web.
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