Decimify for Web App
Drop a GLB or STL model, drag the slider, export the simplified mesh as GLB, STL, or USDZ (AR Quick Look). Runs entirely in the browser.
Works with Blender, 3ds Max, Rhino, Cinema 4D, Unity, Unreal, Three.js, and any workflow that consumes GLB or STL.
Plans
Free$0
- Reductions up to 50%
- GLB, STL, USDZ export
- Unlimited use, no sign-up
- Runs in the browser, no upload
Premium
- Reductions beyond 50% (full slider range)
- Higher polygon throughput
- Same browser-only workflow
- One-time purchase, no subscription
What it solves
Polygon reduction is the problem 3D workflows hit every day:
- Game engines and real-time renderers need models under a triangle budget.
- Web 3D and AR (glTF, USDZ) load faster with fewer polygons.
- 3D printing slicers choke on dense photogrammetry scans.
- Asset libraries want LOD variants for streaming and distance culling.
Decimify reduces polygon count while keeping UV seams and material boundaries clean — no tearing, no stretching, no flattened creases.
Supported formats
| Format | Materials | UVs | Notes |
|---|---|---|---|
| GLB (glTF) | Preserved | Preserved | Recommended. Single file with geometry, materials, and textures. |
| STL | — | — | Geometry only. Best for 3D printing. |
| USDZ | Preserved | Preserved | Export only. Apple AR Quick Look compatible. |
For any other format, convert to GLB first using Blender (File → Export → glTF Binary).
How it works
- Upload. Drop a file onto the tool or click to browse. Your file is parsed in-browser.
- Simplify. Drag the slider to reduce face count. The preview updates in real time — the whole LOD pyramid is computed once, then scrubbed without a rebuild.
- Download. Export as GLB (with textures), STL, or USDZ.
Why it's different
Real-time slider. The whole LOD range is pre-computed once — moving the slider shows each level instantly, no rebuild, no waiting.
Attributes stay intact. UV seams, normals, and material boundaries are preserved through every reduction level. Textures don't tear, shading creases don't soften.
Runs off the main thread. Built on WebAssembly and a background worker so the UI stays responsive even on million-triangle models.
Private by design. No upload. No account. No analytics. Read the privacy policy.
Typical uses
- Reducing a photogrammetry scan before 3D printing.
- Generating LODs for a Three.js or Babylon.js scene.
- Baking a USDZ for AR Quick Look.
- Shaving file size off a glTF before uploading to Sketchfab or a model viewer.
- Hitting a polycount budget for a game asset without reopening Blender.
If you work inside SketchUp, there's a dedicated plugin that simplifies geometry in place while keeping groups, components, and soft edges intact — see Decimify for SketchUp.
