Free converter

Pack glTF into GLB, one binary file.

Drop a .gltf below and download it repacked as a single binary .glb. Everything runs in your browser — the fastest way to turn a JSON glTF into the one-file format that viewers, engines and AR pipelines prefer.

Drop your GLTF file here
or click to browse — converted in your browser, never uploaded
.gltf

Converted locally · never uploaded · no signup

Why this tool

Free, private, in the browser.

One self-contained binary

GLB bundles the glTF's JSON, buffers and textures into a single file — easier to host, share and version.

Lossless repack

GLB is the binary container of the same glTF 2.0 data model; geometry, materials and embedded textures carry straight through.

Local and instant

No upload, no processing queue — the conversion happens in browser memory and downloads immediately.

How it works

Three steps, no setup.

01
Drop your glTF

Drag the .gltf in. Self-contained files (embedded buffers) convert best.

02
Convert to GLB

The scene is re-exported as binary glTF 2.0 with everything embedded.

03
Download the GLB

Ship one file to your web viewer, engine or client.

glTF vs GLB

glTF 2.0 comes in two flavors: .gltf, a JSON file that usually references an external .bin buffer and texture images, and .glb, a binary container that packs all of it into one file. The data model is identical — GLB is simply the deployable form. Single-file assets avoid broken relative paths, CORS issues and multi-file uploads.

External files and this converter

Because the conversion runs in your browser, it reads the .gltf file you drop. Files with embedded (base64) buffers convert perfectly; a .gltf that references external .bin or texture files can't have those fetched from your disk, so heavily externalized files may fail or lose textures. In that case export a GLB directly from your DCC tool — or embed resources first.

Questions

Answered, plainly.

Is the glTF to GLB converter free?+

Yes — completely free, no signup, no limits.

Is the conversion lossy?+

No. GLB is the same glTF 2.0 data in a binary container — geometry, materials, and embedded textures are preserved.

My .gltf references a .bin file. Will it work?+

A browser tool can't read sidecar files from your disk, so externally referenced buffers can fail to load. Use a .gltf with embedded buffers, or export GLB straight from your 3D tool.

Why prefer GLB over glTF?+

One file instead of many: simpler hosting, no broken relative paths, smaller over the wire, and universally accepted by web viewers, engines and AR runtimes.

Can I also view the result?+

Yes — open the downloaded file in the free GLB viewer linked below.

More free tools
GLB / glTF ViewerGLB to STL ConverterOBJ to GLB ConverterAll free tools →
Sculpty studio

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Type a prompt, get a textured 3D model in about a minute — then download it as GLB, STL, OBJ, FBX or USDZ.

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