Draco: Google's library for compressing and decompressing 3D meshes and point clouds

What it supplies: Draco is a library for compressing and decompressing 3D geometric meshes and point clouds, intended to improve the storage and transmission of 3D graphics. The README says it was designed for compression efficiency and speed, and supports points, connectivity, texture coordinates, colour, normals and other generic attributes. It is released as C++ source with C++ and JavaScript decoders. Useful for: - Compress OBJ, STL or PLY meshes into Draco files with draco_encoder. - Decode them with draco_decoder, the C++ decoder or the WASM and JavaScript decoders. - Transcode glTF with draco_transcoder when built with DRACO_TRANSCODER_SUPPORTED, including experimental PMC compression. - Tune size against quality with the quantization and compression-level parameters. First action: - Follow BUILDING.md to build the encoder and decoder. - Run draco_encoder on the included test mesh to try the encoder. - On the web, load the decoders from the versioned GStatic URLs. Prerequisites and limits: This README lists the 1.5.9 release as the latest in its news section and gives no compiler or CMake requirements in the text read; those are in BUILDING.md. The draco_transcoder tool is built only when CMake runs with DRACO_TRANSCODER_SUPPORTED set to ON. - More quantization gives better compression but more deviation, and the right level depends on your project. - The highest compression level gives the worst decompression speed; the lowest gives the least compression. - Versioned GStatic URLs are advised, because unversioned ones can give transient errors after a release. - Polygonal Mesh Coding support is marked experimental. The README states Draco is licensed under the Apache License, Version 2.0. Meshes you compress carry their own rights. Written from the README text only. Statements are as the README gives them; nothing was built or run and no mesh was compressed, so the compression and speed claims are the README's own. Based on README text only; BUILDING.md, the full API sections and the references were not read. No build or run was made; compression and speed claims are the README's own. Source inspected: https://raw.githubusercontent.com/google/draco/d429de84b52a860705507da0884764c5d8321423/README.md ; 26063 bytes ; sha256 ac65a4bf843716f5ba7b656377dc867a608bdf42075d2f8928adb43d44e6ac39 ; 13 exact pinned excerpts in the draft pin map

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  "checked_at": "2026-11-07T10:06:29.551Z",
  "usefulness": "- Compress OBJ, STL or PLY meshes into Draco files with draco_encoder.\n- Decode them with draco_decoder, the C++ decoder or the WASM and JavaScript decoders.\n- Transcode glTF with draco_transcoder when built with DRACO_TRANSCODER_SUPPORTED, including experimental PMC compression.\n- Tune size against quality with the quantization and compression-level parameters.",
  "source_type": "repository",
  "availability": "available",
  "source_owner": "Google, Draco project (declared repository namespace)",
  "known_limitations": [
    "This README lists the 1.5.9 release as the latest in its news section and gives no compiler or CMake requirements in the text read; those are in BUILDING.md. The draco_transcoder tool is built only when CMake runs with DRACO_TRANSCODER_SUPPORTED set to ON.\n\n- More quantization gives better compression but more deviation, and the right level depends on your project.\n- The highest compression level gives the worst decompression speed; the lowest gives the least compression.\n- Versioned GStatic URLs are advised, because unversioned ones can give transient errors after a release.\n- Polygonal Mesh Coding support is marked experimental.\n\nThe README states Draco is licensed under the Apache License, Version 2.0. Meshes you compress carry their own rights.\n\nWritten from the README text only. Statements are as the README gives them; nothing was built or run and no mesh was compressed, so the compression and speed claims are the README's own.\nBased on README text only; BUILDING.md, the full API sections and the references were not read. No build or run was made; compression and speed claims are the README's own.",
    "Rendered page text of the exact archived capture of the README page, read in full by the author; no media viewed or heard; nothing executed or installed.",
    "Source-documented steps; execution not performed. Internal affiliated review is not independent validation."
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