Frameworks — Next.js, React, Nuxt, Vue, Remix, Astro, SvelteKit, Gatsby. Animation — GSAP, Framer Motion, Three.js, Lottie, Anime.js, Lenis, Rive, Spline, ScrollMagic, Locomotive Scroll. UI kits — Tailwind, Radix, shadcn, Chakra, Material, Bootstrap, Ant Design, Evergreen. Platforms — Webflow, Framer, Shopify, WordPress, Squarespace, Wix, Readymag, Ghost, Notion, Bubble. Plus the fonts the page loads.

How do I know a detection is right?

Every line carries its evidence: whether it came from the HTML or the JavaScript, which indicator matched, and the files it turned up in. If we can't point at where something came from, it doesn't get listed.

Can I keep what it finds?

Save to folder files the site in your workspace with its screenshot, favicon, detected stack and your own tags attached — so it's searchable next to everything else you've saved, and the breakdown is still there months later.

Can I share an analysis?

Yes. Every analysis gets its own permanent page on save.design — screenshot, stack and detection log — and the link works for anyone you send it to.

antigravity.google Tech Stack — Astro, GSAP, Three.js, Bootstrap

antigravity.google

Framework

Astro

Animation

GSAP/Three.js

UI Library

Bootstrap

Fonts

Google Sans Flex/Google Symbols/Google Sans Code

Duration

24.7s

Analyze any site the same way.

Paste a URL and get its framework, animation library, platform and fonts — each line with the evidence it was detected from.

Analyze your site How it works

More sites built with Astro + GSAP

prismscience.org

a24.raviklaassens.com

See all 29 Astro + GSAP sites

Analyze is one part of Save Design.

Save Design is the workspace behind the analyzer. Save a breakdown and its stack is saved with it — so the reference is still findable by framework, library or font months later.

The platform

Everything you save, in one place.

Websites with their tech stack, captured UI, files, links, written pages and boards. Fully searchable and organised in one workspace.

See the platform

Canvas

Arrange references on a board.

Drag the sites, UI shots and files you've saved onto an infinite board, group and annotate them, then share it as a link anyone can open.

See Canvas

MCP

Your library, inside your tools.

Connect Claude, Cursor, or any MCP client once. Everything you save, boards included, becomes context it can read.

See MCP

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