Three.js
The most popular JavaScript 3D graphics library. Abstracts WebGL into a scene graph with cameras, lights, materials, geometries, and renderers. Powers 3D web experiences, data visualizations, product configurators, games, and interactive art. Includes loaders for 3D model formats (GLTF, OBJ, FBX), physics integrations, post-processing effects, and WebXR support for VR/AR. Used by virtually every major 3D web experience.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Client-side rendering — no server communication. WebGL sandbox provides OS-level isolation. MIT licensed. Heavily audited by the community for 15+ years.
⚡ Reliability
Best When
You need 3D rendering in the browser — Three.js is the standard choice with the largest community, most examples, and best documentation.
Avoid When
You're building a React application and want declarative 3D — use React Three Fiber (@react-three/fiber) as a React wrapper for Three.js.
Use Cases
- • Build interactive 3D product configurators that let users customize and rotate products in real-time
- • Create data visualizations using 3D charts, graphs, and spatial representations of complex datasets
- • Develop browser-based games and interactive experiences using Three.js's scene graph and animation system
- • Power 3D web portfolio pieces, marketing experiences, and immersive storytelling with WebGL rendering
- • Build WebXR (VR/AR) web experiences that run in browser without app installation using Three.js's XR support
Not For
- • 2D canvas graphics — use Canvas API or Konva for 2D; Three.js overhead is unnecessary for non-3D use cases
- • React-native 3D applications — Three.js is web-only; use React Native with expo-gl for native 3D
- • Simple CSS-achievable visual effects — CSS transforms/animations are more performant for basic 2D visual effects
Interface
Authentication
No authentication — client-side 3D rendering library.
Pricing
MIT licensed. Completely free. Maintained by mr.doob and community since 2010.
Agent Metadata
Known Gotchas
- ⚠ Three.js has no concept of a 'simple' task — every 3D scene requires understanding the camera/renderer/scene/animation loop mental model
- ⚠ Memory management is manual — dispose() must be called on geometries, materials, and textures to prevent GPU memory leaks
- ⚠ GLTF is the recommended model format — OBJ and FBX have separate loader packages and quirks; prefer GLTF for all new assets
- ⚠ WebGL context limits (8-16 textures per draw call, max texture size) constrain what's possible — must work within GPU limits
- ⚠ Three.js uses a Y-up coordinate system — some 3D modeling tools default to Z-up; models may need rotation after import
- ⚠ Mobile WebGL has significant limitations — some desktop Three.js experiences break on mobile due to missing extensions or performance
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Three.js.
Scores are editorial opinions as of 2026-03-06.