3D format reference
GLB vs glTF vs OBJ vs STL vs PLY: Which 3D Format Should You Use?
Compare five common 3D formats by materials, textures, hierarchy, animation, portability and the jobs they are actually suited for.
Updated 27 August 2026 · Reviewed against the current FORM 3D workflow
- Typical time
- Reference guide
- Reading time
- 10 minute read
- Difficulty
- Beginner
- Result
- A defensible format choice for importing, editing or delivering a 3D asset
What this guide covers
No 3D format is best for every job. A format designed to carry a modern runtime scene should not be judged by the same criteria as a simple triangle interchange file. The practical question is which information must survive the handoff.
For browser and game workflows, GLB is usually the strongest supported default because it can package geometry, PBR materials, textures, hierarchy, skins, morph targets and animation in one binary file. Simpler formats remain useful when only geometry or vertex data matters.
Before you begin
- Know whether the asset needs materials, textures, hierarchy or animation
- Know whether the file must be human-readable or self-contained
- Know which formats the receiving tool imports reliably
GLB: portable binary glTF
GLB packages glTF JSON, binary geometry and normally embedded resources into one file. It is convenient for delivery, drag-and-drop import and web hosting because there are fewer external paths to lose.
- Best for: self-contained web and game asset delivery.
- Can carry: PBR materials, textures, nodes, skins, morphs and animation.
- Trade-off: less convenient to inspect manually than JSON glTF.
- FORM 3D support: richest supported import and export path.
glTF: readable scene description with external resources
A .gltf file is JSON and often references separate .bin geometry and image files. This is useful for debugging and source pipelines, but every referenced resource must remain available at the expected path.
- Best for: inspectable pipelines and separately managed resources.
- Can carry: the same broad scene concepts as GLB.
- Trade-off: easy to break when BIN or texture files are moved.
- FORM 3D support: select the glTF together with all referenced local files.
OBJ: established geometry interchange
OBJ represents polygon geometry, UVs and normals and can refer to a separate MTL material description. It remains widely supported, but it does not provide a modern standard scene and animation contract comparable to glTF.
- Best for: static geometry exchange between older or simple tools.
- Can carry: positions, faces, UVs, normals and object/group names.
- Trade-off: materials rely on companions and animation is outside the format.
- FORM 3D support: geometry import; MTL parsing is not currently included.
STL: triangle surfaces for fabrication
STL stores a triangle surface and little else. It is common in 3D printing because manufacturing workflows primarily need geometry, not game materials, rigs or animation.
- Best for: simple printable triangle surfaces.
- Can carry: triangle geometry and normals depending on variant.
- Trade-off: no standard PBR material, hierarchy, UV or animation workflow.
- FORM 3D support: static geometry with generated or repaired normals.
PLY: geometry with vertex properties
PLY can store polygon data and per-vertex properties such as colour. It is common in scanning and research pipelines, where vertex data may matter more than a conventional textured game material.
- Best for: scanned meshes, point or vertex-colour-oriented interchange.
- Can carry: geometry and configurable vertex/face properties.
- Trade-off: weaker standard runtime scene and animation expectations.
- FORM 3D support: triangle geometry and vertex colours when present.
Format decision checklist
- Choose GLB when you need one portable file with modern scene data.
- Choose glTF when readable JSON and separate resources help debugging or deployment.
- Choose OBJ when a static geometry tool does not support glTF well.
- Choose STL for a geometry-only fabrication handoff.
- Choose PLY when vertex colours or scan-oriented vertex properties matter.
- Test the selected file in the receiving application before standardising the pipeline.
Frequently asked questions
Is GLB the same as glTF?
GLB is the binary container form of glTF. Both describe the same broad ecosystem of scene data, but GLB commonly packages the JSON, binary buffers and resources into one file.
Is OBJ or STL better for game assets?
OBJ usually preserves more useful static modelling data such as UVs and normals. STL is primarily a triangle-surface format. For modern game assets with materials and animation, GLB/glTF is generally the stronger choice.
Which format is best for 3D printing?
STL remains common for simple printable geometry, although modern fabrication pipelines may support richer formats. Check the slicer and whether colour or material data is required.
Apply this workflow in the editor
Your project remains editable and stored locally on this device.