Free FBX to GLTF Converter
Lightning-fast FBX to GLTF conversion — 100% in your browser. Your files never leave your device. Free, no watermark, no sign-up.
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Supports GLB, GLTF, OBJ, STL, FBX, PLY
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FBX vs GLTF
See what transfers when converting between these two formats.
| Feature | FBX | GLTF |
|---|---|---|
| Geometry | ||
| Textures | ||
| Materials | ||
| Animation | ||
| Rigging |
All features supported by FBX are preserved in GLTF.
Why convert FBX to GLTF?
Inspect FBX contents in glTF tooling
GLTF's readable JSON descriptor exposes the scene graph, animation clips, and material structure. Drop into the glTF Validator to catch issues.
Apply mesh compression
FBX has no built-in compression. Run the converted GLTF through gltfpack or glTF-Transform to apply Draco or Meshopt — file sizes can drop 5-10x.
Source-control asset changes
GLTF's text-based descriptor plays nicely with git. Diff changes to rigs, materials, or animation that would be invisible inside binary FBX.
Tips for FBX → GLTF
Rigs and animation preserved
GLTF supports skeletons, skin weights, and animation clips. Your FBX rig survives the conversion with full skinning data.
Keep all GLTF files together
GLTF references external .bin buffers and texture images. Move all files together or references break.
Re-bundle to GLB for delivery
Once inspected or compressed, convert GLTF back to GLB to ship a single self-contained file.
Use binary FBX when exporting
Binary FBX parses faster than ASCII FBX. Check your Maya/3ds Max export settings.
Common issues when converting FBX to GLTF
Animation clips missing in GLTF
Fix
Some FBX exporters separate animations into multiple Takes that do not all convert. Open the FBX in Blender, verify each Action is attached to the right armature, then export GLTF/GLB directly from Blender.
Textures appear black or unlit
Fix
FBX embeds textures only when 'Embed Media' is enabled at export. If your FBX references external files, Fast3D cannot fetch them. Re-export with embedded media or place the texture files alongside the FBX.
GLTF file count is high
Fix
Complex FBX files produce many GLTF sub-files: .gltf, .bin, plus one file per texture. Convert to GLB if you want a single shippable file.