What 3D file formats can I optimize?

GLB and glTF (with their .bin and textures, or a .zip of them), OBJ with its .mtl and textures, and FBX. Draco-compressed glTF is decoded on load. The optimized model is always exported as GLB.

Are my 3D models uploaded to a server?

No. Loading, analysis, mesh simplification, texture compression and export all run locally in your browser using Web Workers. The model never leaves your computer.

How much can a 3D model be reduced?

It depends on the model and the level you choose. LOD levels target 75%, 50%, 35%, 20%, 10% or 5% of the original triangles, and you can also set an exact triangle count. Each preset has an error cap, so a model stops losing triangles before it loses its shape, and the tool reports the achieved count.

Does optimizing break rigged or animated models?

Skinning data (joints, weights and inverse bind matrices), morph targets and animation clips are preserved on the surviving vertices. Morph target deltas are not part of the simplification error, so extreme blend shapes should be checked before shipping.

How are textures compressed?

Textures can be resized and re-encoded to WebP, JPEG or PNG, with the resolution following the chosen LOD. Color maps use lossy compression while normal, metallic-roughness and occlusion maps stay lossless, because browser lossy encoders subsample chroma. A texture is only replaced when the result is smaller or lower resolution.

Does the optimized model keep its appearance?

Simplification preserves silhouettes, hard edges, UV seams and material boundaries, and the triangle budget is spread adaptively so flat areas give up more triangles than detailed ones. The tool measures bounding box deviation, surface error (Hausdorff and mean distance) and silhouette error so the result can be judged objectively.

Can I use the optimized GLB in Three.js, WebGL or a game engine?

Yes. The export is a standard GLB, validated before download: container structure, references, indices, normals, UVs, materials, textures and skinning are all checked.

3D Optimizer — optimize and compress 3D models online

3D Optimizer is a browser-based 3D model optimizer. It reduces the polygon count and file size of GLB, glTF, OBJ and FBX models, compresses their textures and exports an optimized GLB for Three.js, WebGL, game engines and the web. JavaScript is required because the whole optimization pipeline runs locally in your browser — your models are never uploaded.

What it does

Mesh simplification (polygon reduction) with feature-preserving quadric edge collapse.
Texture optimization: resizing and compression to WebP, JPEG or PNG.
Removal of hidden or internal geometry, duplicate materials and unused data.
Original vs optimized comparison, measured quality metrics and GLB validation before export.

Supported 3D formats

GLB, glTF (+ .bin and textures), OBJ (+ .mtl and textures), FBX and .zip bundles. Export is always GLB.