--- title: "Compress GLB 3D Models — Draco, Free, No Upload | Compress Pro" description: "Compress GLB 3D models right in your browser — Draco or Meshopt geometry, texture recompression, optional simplify. Nothing is uploaded. Free & private." canonical: https://compress-pro.com/compress-glb --- # Compress GLB 3D models. > 3D models crushed with Draco — right on your own device. Compress GLB 3D models entirely in your browser — **geometry crushed with Draco or Meshopt, embedded textures re-encoded, optionally fewer triangles**. Product models, scans and game assets shrink dramatically; nothing is ever uploaded. **No uploads · No ads · Free & open source.** ## How it works 1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V. 2. Pick a quality or preset — or set an exact target size and let the tool find it. 3. Compress, compare before/after, and download — individually or as a ZIP. ## Three ways to compress geometry Draco (Google) packs vertex data and connectivity the tightest and is decoded by three.js, Babylon.js, and every major engine. Meshopt (EXT_meshopt_compression) trades a little size for very fast, GPU-friendly decoding — also widely supported. And None quantizes the numbers without any compression extension at all: the output opens in every glTF viewer with zero extra decoders, which makes it the safe pick when you don’t control the viewer. ## Textures and triangles Embedded JPEG textures re-encode at your chosen quality and PNGs can be downscaled — 4K textures are the usual culprit in oversized web models, and the Max texture size cap alone often halves a file. Any texture that would grow is kept untouched, and GPU-compressed formats (KTX2) pass through as-is. The optional Simplify slider decimates the mesh itself — permanent detail loss, but the biggest wins on dense photogrammetry scans. ## Under the hood The pipeline is glTF Transform — the reference glTF processing library — running with Google’s Draco codec and meshoptimizer compiled to WebAssembly, all inside a worker on your device. Deduplication, welding and pruning run first, then your chosen codec; animations, materials and scene structure are carried over untouched. Your model never leaves the browser — no queue, no server, no copy of your asset anywhere. ## Frequently asked questions ### Will the compressed model open in my viewer? Draco and Meshopt output needs a viewer with the matching decoder — three.js, Babylon.js, and the major engines all bundle both. If you can’t control the viewer, pick None: that output needs no decoder at all. ### Are animations and materials preserved? Yes — animations, skins, materials and the node hierarchy pass through untouched. Only vertex data is compressed and textures re-encoded; nothing is restructured. ### Why is my .gltf file rejected? A .gltf keeps geometry and textures in separate files this browser tool can’t reach. Export as a single .glb (Binary glTF) — every DCC tool and engine has that option — and it will convert. ### Is my model uploaded? No. The whole pipeline — parsing, compression, texture re-encoding — runs in your browser. The server only delivers this page; your asset never leaves your device. Want proof? Run one file through, switch your connection off, and run another — it still works. ## Related tools - [Compress images](https://compress-pro.com/compress-image) - [Compress videos](https://compress-pro.com/compress-video) - [Zip & Unzip files](https://compress-pro.com/zip-files) --- Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)