GSAP · Index

GSAP

JavaScript animation engine with 19 plugins, now free for commercial use

Tier S · Best in classAnimation LibraryToolgsap.com

GSAP (GreenSock Animation Platform) is a framework-agnostic JavaScript animation engine built around tweens and timelines that can animate any numeric property, CSS value, SVG attribute, or canvas/WebGL object. Webflow acquired GreenSock in 2024 and made the entire toolkit free in April 2025, so the formerly paid Club plugins — SplitText, MorphSVG, DrawSVG, ScrollSmoother, Inertia, GSDevTools — now ship inside the single `gsap` npm package. It is aimed at developers building scroll-driven marketing sites, complex sequenced motion, and physics-flavoured interactions that CSS transitions and simple spring libraries cannot express.

Install

npm install gsap

For an agent

Reach for GSAP when the brief needs a sequenced timeline, scroll-position-driven scrubbing (ScrollTrigger), or SVG path morphing — Framer Motion and CSS transitions cover component enter/exit far more cleanly and should stay the default for React UI state. In React always install `@gsap/react` and wrap animations in `useGSAP()`; a bare `useEffect` leaks tweens across Strict Mode double-renders and hot reloads. Every plugin needs an explicit `gsap.registerPlugin(...)` call and tree-shakes out silently if you forget, and note the licence is source-available proprietary, not MIT — fine to ship, not fine to vendor into an animation-editor product.

Why it is here. GSAP is the twenty-year reference implementation of web animation, and Webflow making the paid plugin set free removed the one reason teams reached for weaker alternatives. Its docs are published as `.md` alongside a full llms.txt index, which makes it one of the few motion libraries an agent can actually read end to end.

Install command, framework, licence and component list.

Facts

License: Source available, Proprietary / all rights reserved
Pricing: Free
Framework: Vanilla JS, React, Next.js, Vue, Nuxt, Svelte, Angular, Webflow
Styling: Inline styles, Not applicable
Distribution: npm package, GitHub repository, Direct download / asset pack
Platform: Web, Cross-platform
Content type: Code
Agent readiness: llms.txt, Structured documentation, CLI installable, Readable open source
Accessibility: Honors reduced motion
Maturity: Actively maintained
Pricing detail: Free, including every former Club GreenSock plugin. Webflow's Standard 'No Charge' License (effective 2025-04-30) permits unlimited commercial use but forbids building a competing no-code visual animation builder.
GitHub stars: 27,734
Package: gsap

Components it ships

Animation Transition Scroll Driven Animation Scroll Reveal Parallax Page Transition Drag And Drop Gesture Text Effect Typewriter Text Count Up Marquee

Helps you build

Homepage Features Splash Screen Onboarding Web App

Notable for

19 plugins in one free npm package
ScrollTrigger for scroll-driven scrubbing
SplitText and MorphSVG now free
llms.txt plus .md docs for every page
gsap.matchMedia() for prefers-reduced-motion

Provenance

Verified 2026-08-16. HTTP 200. https://gsap.com, https://gsap.com/docs/v3/, https://gsap.com/docs/v3/Installation, https://gsap.com/community/standard-license/, https://gsap.com/llms.txt, https://registry.npmjs.org/gsap, https://registry.npmjs.org/@gsap/react, gh api repos/greensock/GSAP

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