All-in-one 3D optimization: mesh simplification, texture compression, and Meshopt or Draco for glTF. Downloads stay in your original format.
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The full compression pipeline: mesh simplification, glTF container encoding (Meshopt by default, or Draco, mutually exclusive), and texture scaling/transcoding (WebP/JPEG/KTX2). Supports GLB, GLTF, OBJ, FBX, STL, PLY. Output matches input format; glTF inputs deliver an optimized GLB. The whole pipeline runs locally in your browser.
Import GLB or glTF models that exceed target web or mobile size limits.
Enable Draco geometry encoding to compress vertex positions, normals, and UVs.
Reduce polygon count with error threshold controls to lower GPU raster load.
Export optimized web-ready GLB asset with up to 90% reduced file size.
It applies the full optimization stack in one pass: mesh simplification, texture resizing/compression, and Meshopt or Draco encoding for glTF. Vertex-only tools skip textures, while texture-only tools skip geometry reduction. For the largest possible size reduction, this is the complete package.
By default you get the same format you uploaded: STL stays STL, OBJ stays OBJ, FBX stays FBX, and PLY stays PLY. GLB/GLTF inputs export an optimized GLB, which is the only case where the container changes.
No. They are mutually exclusive on the same geometry. Use either Meshopt (the default, recommended for web) or Draco for maximum compression, but not both. If you still need a smaller file, increase the simplification strength or compress textures first.
Results vary widely: simple models may shrink by 30-50%, while complex textured models can reach 70-90% with simplification, container encoding, and texture compression all enabled.
WebP offers the best compression ratio, roughly 30% smaller than JPEG at the same visual quality, and is supported by all modern browsers. Use JPEG for maximum compatibility, PNG for lossless or transparency needs, and KTX2 when your engine supports GPU-ready textures.
Yes, use the batch model compression tool to apply the same settings to many files.
The options work on different parts of the model, and some need support in the app that opens the file.
| Changes the shape? | Applies to | Needs app support? | |
|---|---|---|---|
| Mesh simplification | Yes, removes triangles | All formats | No |
| Meshopt | No | GLB output | Yes, the app must read Meshopt-compressed glTF |
| Draco | No | GLB output | Yes, the app must read Draco-compressed glTF |
| WebP or JPEG textures | No, image quality only | Models with textures | WebP is read by all modern browsers |
| KTX2 textures | No, image quality only | GLB output | Yes, many apps and image viewers cannot open it |
| Option | What it does | Default / range |
|---|---|---|
Mesh Simplification | Reduces the number of faces and vertices using mesh simplification. Default medium strength; increasing strength shrinks file size further but may lose surface detail. Only affects geometric density, not the container format. | 50%0% – 100% · step 5% |
Meshopt Compression | Applies EXT_meshopt_compression to glTF/GLB, compressing geometry buffers without changing face count. Enabled by default for runtime-friendly loading. Mutually exclusive with Draco. Not used for non-glTF outputs like STL, OBJ, or FBX.
| On |
Meshopt Level | Controls Meshopt encoding strategy. Default 'High' generally yields smaller size and enables attribute filters, suitable for most web scenarios. 'Medium' applies more uniform quantization across attributes, which may be preferred by conservative toolchains.
| High |
Draco Compression | Applies KHR_draco_mesh_compression to glTF/GLB. Often yields smaller files than Meshopt but with higher decoding overhead. Disabled by default; mutually exclusive with Meshopt. Not used for non-glTF outputs.
| Off |
Compression Strength | Draco encode/decode speed trade-off, range 1, 10. Higher values favor smaller size at the cost of encode speed. Default 6 is suitable for most models. | 61 – 10 |
Encoding Method | Draco topology encoding method. Default Edgebreaker typically gives better compression for triangle meshes. Sequential can be more suitable for ordered strips or point sequences.
| Edgebreaker |
Quantization bits (advanced) | Shown under Advanced settings in the UI. Vertex attribute precision when Meshopt or Draco writes glTF. Defaults: position 14, normal 10, UV 12. Lower bits shrink files more but raise crack, shading, or UV artifact risk. | |
Position Bits | Quantization bits for POSITION attribute (8, 16). Default 14 balances file size and cracking risk. Too low may cause gaps or jitter. | 148 – 16 |
| Option | What it does | Default / range |
|---|---|---|
Normal Bits | Quantization bits for NORMAL attribute (8, 16). Default 10. Too low may cause shading artifacts. | 108 – 16 |
UV Bits | Quantization bits for TEXCOORD attribute (8, 16). Default 12. Too low may cause texture crawling or jitter. | 128 – 16 |
| Option | What it does | Default / range |
|---|---|---|
Max Texture Size | Clamp all textures to this maximum dimension, reducing texture memory and file size. 256px · 512px · 1024px · 2048px · 4096px · Keep Original Size | 1024px |
Texture Format | Convert textures to a more efficient format. WebP offers excellent compression and wide browser support. WebP · JPEG · PNG · KTX2 · Keep Original Format | WebP |
Quality | Sets the compression quality for WebP and JPEG formats. | 0.750.1 – 1 · step 0.05 |
KTX2 Encoding Mode | ETC1S produces smaller files, ideal for diffuse maps. UASTC preserves more detail, recommended for normal maps. |
What is the model for?
A website or web 3D viewer
Use Meshopt with WebP textures, and add light simplification if the model is still heavy.
3D printing (STL)
Only simplification applies. Keep it light and check small details in your slicer.
Sending by email or chat
Simplify and shrink textures until the file is small enough to send.
Keeping an archive copy
Skip simplification so no detail is lost; compress textures only.
