Three.js

Three.js is an open-source JavaScript library that renders 3D graphics in web browsers using WebGL. It provides developers with tools to create complex 3D scenes, animations, and interactive experiences without writing low-level graphics code. Three.js handles cameras, lighting, materials, and geometry, making browser-based 3D content accessible to web developers.

Three.js enables realistic visual experiences directly in the browser with no plugins or downloads required. For digital publishing, this means content can include lifelike animations and interactions that hold reader attention far longer than static PDFs. The library runs on all modern browsers and devices, ensuring broad compatibility.

Three.js is the core rendering engine behind FlipLink's flipbook experience. When you upload a PDF and create a flipbook, FlipLink uses Three.js to render each page as a 3D surface with realistic page-flip animations. Readers see pages curl, fold, and turn just like a physical book, complete with shadows and depth. This 3D rendering runs entirely in the browser, so it works on desktops, tablets, and phones without any software installation. FlipLink also offers a PDF.js-based document viewer for situations where a simpler reading experience is preferred, giving publishers the choice between an immersive 3D flipbook and a clean document layout.

A furniture retailer converts their seasonal catalog PDF into a FlipLink flipbook. Thanks to Three.js, customers browsing on an iPad see pages turn with a smooth 3D animation that mimics flipping through a printed catalog. The visual experience keeps readers engaged longer than a flat PDF viewer would.