The integration of 3D-models, -visual effects and -interactive graphics into websites has evolved from a once niche application into a powerful tool. In the past century, this technical challenge turned into a widespread practice, used by many digital marketplaces to preview products. In recent years especially, the advances of browser-based graphics have transformed the way digital content is experienced. Today, whole games can be developed and played inside of a browser. Something that was unthinkable just a few years ago.
The Technical Foundation: WebGL and WebGPU
WebGL (Web Graphics Library) has served as the cornerstone technology enabling 3D graphics in browsers since its release in 2011. It is a JavaScript API (Application Programming Interface) that’s based on the OpenGL family of APIs. With the use of WebGL, developers are able to render 3D and 2D graphics directly inside of the browser without the need for additional plugins. By providing direct access to the systems GPU (Graphics Processing Unit), WebGL supports hardware acceleration for rendering which significantly improves visual performance. This allows developers to implement realistic lighting, detailed textures and dynamic animations that would otherwise be very CPU (Central Processing Unit) intensive. With efficient GPU utilization, WebGL supports advanced visuals such as reflections, shadows and particle systems.
As time passed and GPU technology continued to developed, demands for higher performance and better visuals grew. This advancement lead to the introduction of WebGPU in 2023. It is built with modern GPU APIs such as Direct3D 12, Metal and Vulkan which lets it more efficiently communicate with the new hardware systems. This significantly increased performance and enabled new possibilities for developers.
Benchmarks between the two technologies showed a drastic improvements regarding performance. An example would be a metaball demo that ran at 8 FPS on WebGL which WebGPU handled easily with a Frame rate of 60 which is almost a 10x improvement over the old technology.
WebGPUs architecture mirrors modern native GPU programming practices as it offloads most of the rendering directly to the GPU. This way the browsers main JavaScript thread is free to be able to handle user interactions etc. resulting in smoother and more responsive experiences.
The Technical Foundation: High-Level Frameworks
While APIs like WebGL and WebGPU provide the low-level interface to GPU hardware, using them directly requires vast knowledge in graphics programming and massive amounts of code to run even the most basic tasks. As this is a very time intensive tasks, a variety of high-level frameworks have emerged that simplify the process and enable developers to focus on design instead of programming.
Three.js
Probably the most widely used framework for creating 3D web applications is Three.js. It is build on top of WebGL and offers a simplified approach to 3D graphics within the browser and it is open-source.
Three.js itself uses a system that organizes 3D scenes through a well structured hierarchy known as a scene graph. This manages the relationships among the elements in a scene such as cameras, lights, meshes and models.
Three.js is made up of the renderer, which enables the viewer to see the objects, lights, etc. placed into the scene. The scene is made up of all the objects, such as lights, camera and meshes. Then there is geometry, which are the individual vertexes of the objects and materials, which represent the surface properties of the objects. Meshes are just a combination of both materials and geometry. Textures are images used by the materials to represent the surface properties and finally light, which is used to light up the scene, to be able to see the meshes.
With this hierarchy, Three.js simplifies the developing of interactive 3D visualizations and animations for the web.
Babylon.js
Another powerful framework is Babylon.js, a real time 3D render engine that was originally developed in TypeScript and was compiled to JavaScript to ensure browser compatibility. Babylon.js is designed for large-scale interactive applications and supports a wide array of use cases such as virtual worlds and educational platforms.
Something that sets Babylon.js apart is its comprehensive and well documented ecosystem that includes an interactive playground for testing and experimenting. The engine includes advanced features such as post-processing effects and Gizmos (tool for real time manipulation). These tools make Babylon.js a particularly powerful tool in the hands of a developer for complex interactive environments that require flexible user interaction.
Frameworks like Three.js and Babylon.js bridge the gap between GPU-level programming and high-level web development, enabling designers and programmers to integrate interactive 3D experiences seamlessly into web applications.
SOURCES
1: https://www.mongeyplunkettmotors.ie/2025/08/30/how-webgl-powers-engaging-browser-games-today/
2: https://dev.to/himj266/delving-into-the-world-of-3d-web-from-webgl-to-threejs-and-react-three-fiber-23kh
3: https://developer.chrome.com/blog/webgpu-io2023
4: https://texturecompression.com/blog/ktx2-format-guide
