Astro 7 represents the most significant leap in the framework’s history. With a Rust-based compiler, Vite 8 integration, and a new Markdown pipeline, builds are 15-61% faster across the board. Here is how to get started.

What’s New in Astro 7

The headline changes in Astro 7:

  • Rust compiler replaces the Go-based compiler as the default
  • Vite 8 with Rolldown bundler for faster production builds
  • Sätteri as the default Markdown processor
  • Queued rendering enabled by default
  • Route caching now stable

These are not incremental improvements. They represent a fundamental rearchitecture of how Astro processes your project.

The Rust Compiler

The Rust compiler is stricter about HTML validity — unclosed tags now produce errors instead of silent fixes. This is a good thing: it catches bugs earlier and produces more predictable output.

<!-- This will error in Astro 7 -->
<p>Hello world

<!-- This is correct -->
<p>Hello world</p>

Project Setup

Creating a new Astro 7 project takes seconds:

npm create astro@latest my-blog
cd my-blog
npm run dev

For existing projects, upgrade with:

npx @astrojs/upgrade

Content Collections

Content collections are the recommended way to manage blog posts, documentation, and any structured content. Define a schema once, get type safety everywhere.

// src/content.config.ts
import { defineCollection, z } from 'astro:content';
import { glob } from 'astro/loaders';

const blog = defineCollection({
  loader: glob({ pattern: '**/*.md', base: './src/content/blog' }),
  schema: z.object({
    title: z.string(),
    description: z.string(),
    pubDate: z.coerce.date(),
    tags: z.array(z.string()).default([]),
  }),
});

export const collections = { blog };

Querying Content

The getCollection() API provides a clean interface for fetching and filtering content:

import { getCollection } from 'astro:content';

const posts = await getCollection('blog', ({ data }) => !data.draft);
const sorted = posts.sort((a, b) =>
  b.data.pubDate.valueOf() - a.data.pubDate.valueOf()
);

Dynamic Routes

Content in collections does not automatically become pages. You create a dynamic route:

---
// src/pages/blog/[slug].astro
export async function getStaticPaths() {
  const posts = await getCollection('blog');
  return posts.map(post => ({
    params: { slug: post.id },
    props: { post },
  }));
}

const { post } = Astro.props;
const { Content } = await render(post);
---

<article>
  <h1>{post.data.title}</h1>
  <Content />
</article>

Image Optimization

Astro’s built-in <Image /> component handles responsive images, format conversion, and lazy loading:

---
import { Image } from 'astro:assets';
import hero from '../assets/hero.jpg';
---

<Image src={hero} alt="Hero" widths={[400, 800, 1200]} sizes="(max-width: 800px) 100vw, 800px" />

SEO Integrations

Astro’s integration ecosystem covers the essentials:

// astro.config.mjs
import sitemap from '@astrojs/sitemap';

export default defineConfig({
  site: 'https://example.com',
  integrations: [sitemap()],
});

Add RSS, robots.txt, and structured data with minimal configuration.

View Transitions

Astro’s view transitions provide smooth page navigation without a full SPA framework:

---
import { ClientRouter } from 'astro:transitions';
---

<head>
  <ClientRouter />
</head>

Performance Tips

  1. Use content collections instead of import.meta.glob() for type safety
  2. Prerender everything unless you specifically need SSR
  3. Use islands sparingly — only hydrate interactive components
  4. Optimize images at build time with the Image component
  5. Enable route caching for frequently accessed pages

Deploying

Astro sites deploy anywhere static files are served:

  • Cloudflare Pages — npm run build, output dist/
  • Netlify — same build command
  • Vercel — auto-detected
  • GitHub Pages — with base config for project sites

Conclusion

Astro 7 is the fastest, most capable version of the framework yet. Whether you are starting a new blog or migrating an existing site, the combination of Rust compilation speed, content collections, and islands architecture makes it the best choice for content-heavy sites in 2026.