pygltflib
Python library for reading, writing and managing 3D objects in the Khronos Group gltf and gltf2 formats.
Decision gist · record as of 2026-08-14
Yes, if you need to work with GLTF/GLB files in Python. The package is mature, has no known vulnerabilities, carries a permissive license, and installs cleanly. The aging maintenance status (386 days since last release) is a minor concern for new features but not a blocker for stable, read-write operations on standard GLTF v2 files.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.6 or above.
- Low install friction with three lightweight runtime dependencies.
- Maintenance status is aging—last release was 386 days ago—so expect slower response to issues, though the package remains functional for current use.
License · maintenance · safety
permissive license (permissive) — Licensed under MIT (permissive), so you can use, modify, and distribute this package freely in commercial and open-source projects with minimal restrictions.
last release 2025-07-24 (386 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 817,356 downloads/mo, #4,985 on PyPI
Alternatives
Verify before relying
pip install pygltflib
from pygltflib import GLTF2
gltf = GLTF2().load("model.gltf")
gltf.convert_buffers(BufferFormat.BINARYBLOB)
gltf.save("model.glb")- Whether the experimental validator covers all GLTF2 specification rules or only a subset.
- Current state of B3DM file support and whether it has been added since the documentation was written.
- Performance characteristics when handling large models or many assets.
What it is and what it does
pygltflib is a Python library for working with GLTF and GLB 3D model files, the standard formats defined by the Khronos Group. It provides a complete, type-hinted API to load, create, modify, and save 3D scenes with full support for the GLTF v2 specification—including meshes, materials, animations, and vendor extensions. The library handles both text-based GLTF and binary GLB formats, and can convert between them, embed or externalize buffer data, and extract or import image files.
The package is built on three runtime dependencies: dataclasses for structured data, dataclasses-json for serialization, and deprecated for marking obsolete APIs. It works across Python 3.6 and above and is widely used in 3D graphics pipelines where standardized model interchange is needed.
Use it for
- Load and inspect GLTF/GLB models in a Python application to read mesh geometry, materials, and animations.
- Convert between GLTF and GLB formats, or switch buffer storage between embedded data URIs, external binary files, and GLB blobs.
- Extract images from GLTF files and save them as files, or import image files as assets into a model.
- Programmatically create 3D scenes and meshes from scratch and export them in GLTF format.
- Validate GLTF objects for specification compliance and troubleshoot structural issues in model files.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need to work with GLTF/GLB files in Python.
The package is mature, has no known vulnerabilities, carries a permissive license, and installs cleanly. The aging maintenance status (386 days since last release) is a minor concern for new features but not a blocker for stable, read-write operations on standard GLTF v2 files.
Install
pygltflib on PyPI
Before you install
Low install friction with three lightweight runtime dependencies. Maintenance status is aging—last release was 386 days ago—so expect slower response to issues, though the package remains functional for current use.
Requires Python 3.6 or above.
License in practice
Licensed under MIT (permissive), so you can use, modify, and distribute this package freely in commercial and open-source projects with minimal restrictions.
Quickstart
pip install pygltflib
from pygltflib import GLTF2
gltf = GLTF2().load("model.gltf")
gltf.convert_buffers(BufferFormat.BINARYBLOB)
gltf.save("model.glb")Verify before relying
- Whether the experimental validator covers all GLTF2 specification rules or only a subset.
- Current state of B3DM file support and whether it has been added since the documentation was written.
- Performance characteristics when handling large models or many assets.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.6 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packagesdataclassesdataclasses-jsondeprecated |
| Maintenance | Aging 386 days since the last release |
| First released | |
| Downloads | 817,356 / month, #4,985 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3 |
Evidence: pygltflib-1.16.5-py3-none-any.whl
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