Astro — The Architecture of Speed

The Web Framework

The web framework for content-driven websites.
Ship less JavaScript. Build more.

Philosophy

The Quiet
Revolution

Not every framework needs to scream for attention. Astro's genius is architectural restraint — a philosophy where less is not merely more, it is everything.

01

Islands Architecture

Astro pioneered a revolutionary component model that renders every page as pure, static HTML by default — hydrating only the interactive islands that require it.

02

Zero JavaScript

By default, Astro generates websites with no client-side JavaScript runtime overhead. Nothing ships unless you ask for it.

03

Framework Agnostic

Bring React, Vue, Svelte, or Solid — Astro orchestrates them all within a unified, content-first architecture without compromise.

04

Content First

Astro's entire design philosophy is tuned for content-rich websites. Your content is the architecture. Astro is the infrastructure.

0 KB

JavaScript by Default

100 /100

Lighthouse Score

40 %

Faster Than React Apps

∞

Framework Compatibility

Architecture

Layers of
Pure Logic

Astro's architecture is not accidental. Every layer is a deliberate engineering decision, each one serving the singular purpose of delivering content with absolute efficiency.

Read the Docs

Content Layer

Unified content API for local files, remote APIs, CMSes

Component Layer

Framework-agnostic island hydration and composition

Build Layer

Vite-powered zero-config bundling and optimization

Output Layer

Static HTML, SSR, or hybrid — your choice, no cost

Performance

Engineered
for Speed

Every millisecond is an architectural decision. Astro's output is the result of ruthless performance engineering.

Islands Architecture · Zero JS Default · Type Safety · Content Collections · View Transitions · Hybrid Rendering · Vite Powered · Edge Ready · Framework Agnostic · Perfect Lighthouse · Islands Architecture · Zero JS Default · Type Safety · Content Collections · View Transitions · Hybrid Rendering · Vite Powered · Edge Ready · Framework Agnostic · Perfect Lighthouse ·

~0ms TTI

Island Hydration

Only the JavaScript your visitors actually need. Interactive islands hydrate on demand — idle, visible, or on interaction.

Native API

View Transitions

Cinematic page transitions powered by the native browser View Transition API with zero-overhead routing.

Type-Safe

Content Collections

Type-safe content APIs with automatic schema validation, built-in Markdown, MDX, and unlimited data sources.

100 / 100

Core Web Vitals

Astro sites consistently score perfect Lighthouse metrics. LCP, FID, CLS — all mastered by default.

<100ms HMR

Vite Powered

Hot module replacement, instant server start, and optimized production builds backed by the fastest build tool.

3 Modes

Hybrid Rendering

Static, SSR, or edge — choose the optimal rendering strategy per route without architectural compromise.

The Manifesto

We believe the web
should be fast.
Not occasionally fast.
Not fast for some.
Fast. By default.
Always.
We ship less
to deliver more.
Astro is not a philosophy.
It is a commitment.

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