Font Optimization

Since version 10.2, Next.js has built-in web font optimization.

By default, Next.js will automatically inline font CSS at build time, eliminating an extra round trip to fetch font declarations. This results in improvements to First Contentful Paint (FCP) and Largest Contentful Paint (LCP). For example:

// Before
<link
  href="https://fonts.googleapis.com/css2?family=Inter"
  rel="stylesheet"
/>

// After
<style data-href="https://fonts.googleapis.com/css2?family=Inter">
  @font-face{font-family:'Inter';font-style:normal...
</style>

Usage

To add a web font to your Next.js application, override next/head. For example, you can add a font to a specific page:

// pages/index.js

import Head from 'next/head'

export default function IndexPage() {
  return (
    <div>
      <Head>
        <link
          href="https://fonts.googleapis.com/css2?family=Inter"
          rel="stylesheet"
        />
      </Head>
      <p>Hello world!</p>
    </div>
  )
}

or to your entire application with a Custom Document.

// pages/_document.js

import Document, { Html, Head, Main, NextScript } from 'next/document'

class MyDocument extends Document {
  render() {
    return (
      <Html>
        <Head>
          <link
            href="https://fonts.googleapis.com/css2?family=Inter"
            rel="stylesheet"
          />
        </Head>
        <body>
          <Main />
          <NextScript />
        </body>
      </Html>
    )
  }
}

export default MyDocument

Automatic Webfont Optimization currently supports Google Fonts and Typekit with support for other font providers coming soon. We're also planning to add control over loading strategies and font-display values.

Disabling Optimization

If you do not want Next.js to optimize your fonts, you can opt-out.

// next.config.js

module.exports = {
  optimizeFonts: false,
}

Related

For more information on what to do next, we recommend the following sections: