The Best Astro Animation Libraries in 2026
Astro ships almost no JavaScript by default, and that is the point. Animation changes that, so the decision is not only which library looks best but how much JavaScript you are willing to send to keep the page fast. Some effects can stay in CSS; page transitions are built in.
We make ExodeUI, which is a design tool with runtimes rather than a page-animation library. For Astro marketing pages, the options below are the better fit.
Use Astro's built-in view transitions for page-to-page changes and CSS for hover and reveal effects. Add Motion when an interactive island needs springs or gestures. Add GSAP when you need scroll timelines and SVG morphing. Swup is an alternative only if you are not using Astro's own router. Lenis is for smooth scrolling, not for animation itself.
Quick picks by job
| If you need | Use |
|---|---|
| Page transitions between routes | Astro view transitions |
| Springs and gestures inside an island | Motion |
| Scroll timelines and SVG | GSAP |
| Momentum scrolling | Lenis |
| Hover and reveal effects with no JavaScript | CSS |
How we compared them
- How much JavaScript it ships to the client
- Whether it works with Astro's island model or needs a full-page script
- What it animates: route changes, components, or scroll
The 5 best Astro animation options
1. Astro view transitions
Best for: Animating between pages without a client-side router rewrite
- Platforms
- Astro sites
- Price
- Free, part of Astro
- Output
- Page transitions handled by the browser
Astro's built-in view transitions use the browser's View Transitions API and add almost nothing to your bundle. You get cross-fade and named-element morphs between routes, with a fallback for browsers that do not support it. It is the first thing to try before adding a library.
Pros and cons
- Very little client JavaScript
- Works with Astro's routing
- Named element transitions for shared components
- Limited to what the browser supports
- Not a component-level animation system
2. Motion
Best for: Interactive islands that need springs, layout and gestures
- Platforms
- Any (JavaScript, React, Vue)
- Price
- Open source; optional paid extras
- Output
- Animation inside your island components
If you have a React or Vue island that needs real interaction, Motion is the least surprising choice. Layout animations and exit animations are straightforward, and the animation only loads with the island. Keep it out of static sections, where CSS is enough.
Pros and cons
- Good React and Vue integration
- Layout and gesture support
- Loads only where the island loads
- Adds client JavaScript
- Overkill for a fade-in
3. GSAP
Best for: Scroll-driven scenes, SVG and long timelines
- Platforms
- Any (JavaScript)
- Price
- Free for everyone, including commercial use
- Output
- JavaScript animation in the page
GSAP handles the ambitious Astro marketing page: pinned sections, scroll-linked timelines, SVG line drawing and text splitting. It is a client-side library, so load it only on the pages that need it and be careful with layout shift before it initialises.
Pros and cons
- Free, including former paid plugins
- Best scroll and SVG tooling
- Framework agnostic
- A meaningful bundle on a site built to be light
- Needs careful setup for no-JS and reduced-motion
4. Lenis
Best for: Smooth momentum scrolling that other animations read from
- Platforms
- Any (JavaScript)
- Price
- Free and open source
- Output
- Smoothed scroll values in the page
Lenis does not animate anything by itself. It smooths the scroll and exposes a value that GSAP or your own code can use. Adding it is a taste decision: some users find smoothed scrolling pleasant, others find it laggy or an accessibility problem.
Pros and cons
- Small and focused
- Works well with GSAP ScrollTrigger
- Free and open source
- Can feel laggy on low-end devices
- Should be disabled for reduced-motion users
5. CSS animations and scroll-driven animations
Best for: Hover, reveal and simple scroll effects with no dependency
- Platforms
- Modern browsers
- Price
- Free, built into the browser
- Output
- CSS in your stylesheets
On a site whose main selling point is speed, CSS is the right default. Transitions cover hover and focus, and scroll-driven animations cover reveals and progress indicators without JavaScript. Check support in the browsers your visitors use before relying on the newest parts.
Pros and cons
- No JavaScript at all
- Cheap to run and easy to audit
- Reduced-motion support with one media query
- No sequencing or timeline composition
- Browser support varies for the scroll-driven parts
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Also worth a look
Animation and Astro's island model
Astro renders static HTML and only hydrates the islands you mark. Animation that lives inside an island only costs the pages where that island appears. A global script tag, by contrast, costs every page. Decide per effect: static CSS for the page, an island for the interactive part, and a library only inside that island.
Design the no-JavaScript version first
A large share of Astro s value is that the page works before JavaScript loads. Animated content that starts at opacity zero and only appears when a script runs will look broken if the script fails or is slow. Start visible, then animate, and test with JavaScript disabled.