meshy2glb

Open a 3D file or model URL, inspect it locally, and export a standard model or an experimental limited-color paint snapshot.

Open the live app → amal-david.github.io/meshy2glb

No installation or account is needed for the browser converter. Start with Try a textured sample, open your own file, or paste an accessible model URL.

Asset Lens · Viewer capture guide · Algorithm and benchmark · Deployment

GitHub Pages publishes the root of main. The live-site verification workflow checks that the published application files match the merged commit. Unmerged pull-request changes are not part of the live site.

Three connected entry points

Files and folders. Drop a .meshy, GLB, glTF, OBJ, STL, PLY, DAE, 3MF or FBX file. For glTF/OBJ, include its BIN, MTL and texture companions. Folder paths are preserved; ambiguous duplicate filenames produce an error instead of the wrong texture. This is a single-model tool, not a batch converter.

Model URLs. Paste or drop a direct HTTPS asset URL. Public Meshy model-page URLs use an experimental public-task resolver. The source must permit browser access through CORS. This is not a proxy or an authentication/download-restriction bypass. Private, expired or blocked resources need an authorized local export. No file contents are sent to our server.

Displayed geometry. The optional Chrome MV3 extension scans an exposed compatible Three.js scene only after a click, lists visible meshes for explicit selection, and saves their static world-space geometry as GLB. It needs only activeTab and scripting, not persistent access to every website. See installation and limitations.

Use Asset Lens, the companion asset-inspection extension, to find/filter accessible assets on a page. Copy a model URL into meshy2glb or download the asset and open it here. The link is inside the app; Asset Lens itself is not duplicated or modified.

Inspect and export deliberately

The viewer has orbit controls, lighting/background controls, wireframe, auto-rotate and animation-clip preview. Camera framing and preview materials are separate from original export data.

Choose the content before choosing the format:

Content	Meaning
Original asset	Preserve original GLB bytes when available; .meshy exports the validated decompressed GLB. Other routes regenerate supported scene data and clips.
Painted static snapshot	Export the processed limited-color surface as vertex-colored GLB or slicer-native painted 3MF.
Displayed geometry only	Bake the current visible pose into a static GLB; omit textures, normals, rigs and animation.

GLB, glTF, OBJ, STL, PLY and USDZ remain available. The UI explains each route's losses. OBJ export has no MTL/texture package. USDZ approximates Basic/Phong materials and explicitly rejects unsupported arrangements rather than reporting success with missing geometry. Required Draco/KTX2 extensions are not decoded by this build.

Experimental texture to paint

Choose 2–16 colors, a detail budget and edge-aware cleanup; generate a preview; edit palette swatches; then export. A generated textured cube is available through Try a textured sample—no external model is needed.

The independent processing pipeline uses area-weighted Oklab palette fitting, raster contour clipping with shared boundary splits, and a source-contrast-aware Potts objective. Small two-color graphs use a minimum-cut solver; larger or multicolor graphs use monotone local optimization. The algorithm note describes the objective and exact scope of its guarantees.

Native 3MF serialization is reused from EllsworOpan's three-mf bundle in Texture2Paint, with its MIT license retained. Select PrusaSlicer 2, Bambu Studio or OrcaSlicer encoding, choose millimeters per source unit, and assign printer/filament slots in the destination slicer. GLB/glTF ordinarily uses meters, hence the default 1000 mm/unit; unitless inputs require a deliberate choice.

This is not automatic mesh repair, a printability certificate, a decal baker, or a replacement for the full Texture2Paint project. Transparent paint inputs and GPU-only deformation are unsupported. Features smaller than the chosen raster resolution can disappear; budgets are surfaced explicitly. Output is a static surface, not an animated rig. Native archive roundtrips do not establish successful physical printing.

Run and verify

For the website, no build is required:

git clone https://github.com/Amal-David/meshy2glb.git
cd meshy2glb
./start.sh

Use HTTPS or localhost for WebCrypto. Runtime Three.js modules are pinned to 0.169.0 on a CDN; client-side processing does not mean the first visit is offline.

Node 22 is the tested development target:

npm ci
npm test                       # dependency-free core tests; also builds extension
npm run test:legacy             # historical real-.meshy tests; fixtures may be absent
npm run benchmark              # writes docs/benchmark.json, all seeded trials
npx playwright install chromium
npm run test:browser            # browser export and native archive roundtrips
npm run build:extension         # dist-extension/, load unpacked in Chrome

The benchmark checks the upstream reference worker's Git blob hash before executing it. CI publishes benchmark JSON, browser traces/screenshots and the built extension as artifacts. Development dependencies are pinned through the committed npm lockfile.

Architecture

src/input.js, model-loader.js   URL/file/resource resolution
src/glb.js, decrypt.js,
  decompress.js                validated binary conversion
src/viewer.js                  independent preview scene/materials
src/export.js                  explicit export routes
src/snapshot.js, discovery.js  shared geometry capture and bounded discovery
src/paint-core.js, binary-cut.js
src/contours.js, surface.js     independent paint algorithms
src/paint-adapter.js            Three.js and native 3MF adapters
src/vendor/three-mf/            attributed upstream slicer-format writer
extension/                     optional active-tab geometry exporter
scripts/benchmark.mjs           comparative cleanup experiment
scripts/check-pages.py         public deployment verification

No analytics, session recording or asset uploads are added. URL import contacts the selected source; the website loads pinned libraries from a CDN. Conversion happens on-device. Only use models you own or have permission to convert/export.

Credits and license

This project is MIT licensed. See THIRD_PARTY.md for exact reused code, pinned upstream revision, author credits and licenses. Integrations draw on Asset Lens, MeshySec and the original meshy2glb ecosystem; our decoder does not ship Meshy's proprietary WASM. Historical format investigation remains in NOTES.md, which is not a current compatibility or performance guarantee.

Not affiliated with Meshy AI. Upstream changes can affect .meshy compatibility and the experimental public-page resolver.