Build fast websites with Astro

Why Astro

Fast by design, not as an afterthought.

Astro is an open source web framework for content-first websites that ships no JavaScript to the browser by default. As a result, Astro sites load as static HTML and stay fast, even with a lot of content. Four principles make that possible.

Speed and zero JS

Astro ships no JavaScript to the browser by default. Pages load as static HTML, so the LCP stays low.

Content-first

Markdown, MDX and content collections are central. Writing and publishing feels like blogging, not programming.

Islands architecture

Only make the interactive islands on a page dynamic. The rest stays static and fast.

SEO and findability

Clean, semantic HTML and fast load times are a gift to search engines and AI search systems.

Signature

The release calendar, live from GitHub.

Follow every Astro release. The data comes straight from GitHub, refreshed every few hours by a cron and shown per month. Filter by package or read the release notes.

Open the release calendar

index.astro

---
const posts = await getCollection("blog");
---

<Layout>
  <h1>Recent posts</h1>
  {posts.map((p) => (
    <PostCard post={p} />
  ))}
</Layout>

Developer experience

Components you already know, output you do not feel.

Write in .astro, or bring your own React, Vue or Svelte. Astro strips the runtime where you do not need it, so visitors only receive HTML and CSS unless interaction calls for it.

Bring your own framework, or none at all
Type-safe content collections
View Transitions out of the box

In numbers

Measured, not promised.

A real Lighthouse measurement of this page. All four categories (performance, accessibility, best practices and SEO) scored 100 out of 100.

0/100

Lighthouse performance

0.0s

Largest Contentful Paint

0.000

Cumulative Layout Shift

0ms

Total Blocking Time

Measured with Google Lighthouse 13.4.0 on a mobile profile (Moto G Power), 27 June 2026. First Contentful Paint 1.1 s, Speed Index 2.4 s.

Blog

Frequently asked questions about Astro

What is Astro?

Astro is an open source web framework for content-focused websites that ships almost no JavaScript to the browser by default. Pages load as static HTML and stay fast as a result.

Why is an Astro site fast?

Because Astro delivers pages as static HTML and only ships JavaScript for the interactive islands, not for the whole page. The browser has far less work to do.

Does Astro work with React, Vue or Svelte?

Yes. Astro is framework-agnostic: you write pages in .astro and add React, Vue, Svelte or Solid for the interactive parts. The runtime only loads where you place an island.

Is Astro good for SEO and AI search engines?

Yes. Astro delivers clean, fast HTML, and that speed and clear structure help both classic SEO and visibility in AI answer engines (GEO).

Is Astro free?

Yes. Astro is free and open source under the MIT licence. Since January 2026 the team has been part of Cloudflare, but Astro stays free and runs on multiple platforms.

Which websites is Astro suited for?

For content-focused sites such as marketing sites, blogs, documentation, portfolios and company sites. For highly interactive web apps, other frameworks are often more suitable.

Who can help me build an Astro site?

ClickForest, the agency behind AstroBuild, builds fast, bespoke Astro sites for the Benelux. You can request a website with no obligation. Have your website built by ClickForest.

Get started

Discover what Astro can do.

Astro is open source and free. Follow the releases live, read the blog and see why a content-first stack is so much faster.

See the release calendar Why Astro

Build fast websites with Astro.