V0 projects use Next.js, so custom fonts should be loaded via the next/font module in app/layout.tsx rather than manual CSS imports or link tags. This approach eliminates layout shift by preloading fonts and applying size-adjust automatically. Google Fonts integrate directly through next/font/google, while custom font files go in the /public directory and load through next/font/local.
Why custom fonts cause layout issues in V0 projects
V0 generates Next.js projects that use Tailwind CSS for styling and the Inter font by default. When you add custom fonts incorrectly — via CSS @import, Google Fonts CDN link tags, or self-hosted files without proper loading configuration — the browser initially renders text with a fallback system font, then swaps to the custom font once it loads. This causes Cumulative Layout Shift (CLS) where text jumps and containers resize visibly. The next/font module solves this by preloading fonts and calculating a size-adjust value that prevents visible layout shifts.
- Loading fonts via CSS @import or link tags instead of next/font
- Missing font-display: swap causing invisible text during font load
- Font file not preloaded — browser downloads it only when CSS applies
- Applying custom font class only to body but not inheriting to all children
- Using a font weight that is not included in the loaded font subset
Error messages you might see
Module not found: Can't resolve 'next/font/google'The next/font module requires Next.js 13.0 or later. V0 projects use recent Next.js versions, but this error can appear if you export V0 code into an older Next.js project.
Font loader values must be explicitly written literals.next/font requires font configuration values (weight, subsets) to be static string literals, not variables. Replace dynamic values with hardcoded strings in the font configuration.
Failed to find font override values for font 'CustomFont'next/font/local could not calculate size-adjust values for the custom font file. Ensure the font file path is correct and the file is a valid .woff2, .woff, or .ttf font.
Before you start
- A V0 project using Next.js App Router
- The name of the Google Font or custom font files (.woff2 preferred)
- Access to app/layout.tsx in V0's code editor
How to fix it
Load Google Fonts using next/font/google in layout.tsx
next/font/google downloads the font at build time and self-hosts it, eliminating external network requests and preventing layout shift through automatic size-adjust calculation.
Load Google Fonts using next/font/google in layout.tsx
next/font/google downloads the font at build time and self-hosts it, eliminating external network requests and preventing layout shift through automatic size-adjust calculation.
Open app/layout.tsx in V0's code editor. Import the desired font from next/font/google, configure it with the subsets and weights you need, then apply its className to the html or body element.
// Bad: Loading via CSS @import causes layout shift// globals.css@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');body { font-family: 'Poppins', sans-serif;}// app/layout.tsx — correct approach using next/fontimport { Poppins } from 'next/font/google';const poppins = Poppins({ subsets: ['latin'], weight: ['400', '600', '700'], display: 'swap', variable: '--font-poppins',});export default function RootLayout({ children,}: { children: React.ReactNode;}) { return ( <html lang="en" className={poppins.variable}> <body className={poppins.className}> {children} </body> </html> );}Expected result: The Poppins font loads without any visible layout shift. Text renders in the correct font from the first paint.
Configure Tailwind to use the custom font variable
Applying the font only via className on the body works for default text, but Tailwind utility classes like font-sans still use the default font stack. Adding the CSS variable to Tailwind's config ensures consistent font usage.
Configure Tailwind to use the custom font variable
Applying the font only via className on the body works for default text, but Tailwind utility classes like font-sans still use the default font stack. Adding the CSS variable to Tailwind's config ensures consistent font usage.
After setting the variable property in next/font (e.g., --font-poppins), reference it in your Tailwind configuration so that font-sans applies your custom font throughout the project.
// tailwind.config.ts — default font stacktheme: { extend: {},}// tailwind.config.ts — custom font integratedimport type { Config } from 'tailwindcss';const config: Config = { content: ['./app/**/*.{ts,tsx}', './components/**/*.{ts,tsx}'], theme: { extend: { fontFamily: { sans: ['var(--font-poppins)', 'system-ui', 'sans-serif'], }, }, }, plugins: [],};export default config;Expected result: All Tailwind font-sans utilities now use your custom Poppins font throughout the V0 project.
Load custom (self-hosted) font files with next/font/local
For proprietary or non-Google fonts, next/font/local loads font files from your project directory with the same layout-shift prevention benefits as next/font/google.
Load custom (self-hosted) font files with next/font/local
For proprietary or non-Google fonts, next/font/local loads font files from your project directory with the same layout-shift prevention benefits as next/font/google.
Place your font files (preferably .woff2 format) in a /public/fonts directory. Import next/font/local in layout.tsx and point it to your font files. Configure weight and style for each file.
// globals.css — manual @font-face with layout shift@font-face { font-family: 'BrandFont'; src: url('/fonts/BrandFont.woff2') format('woff2'); font-weight: 400; font-display: swap;}// app/layout.tsx — next/font/local approachimport localFont from 'next/font/local';const brandFont = localFont({ src: [ { path: '../public/fonts/BrandFont-Regular.woff2', weight: '400', style: 'normal', }, { path: '../public/fonts/BrandFont-Bold.woff2', weight: '700', style: 'normal', }, ], variable: '--font-brand', display: 'swap',});export default function RootLayout({ children,}: { children: React.ReactNode;}) { return ( <html lang="en" className={brandFont.variable}> <body className={brandFont.className}> {children} </body> </html> );}Expected result: Custom font files load with preloading and size-adjust, matching the same zero-layout-shift behavior as Google Fonts.
Complete code example
1import type { Metadata } from 'next';2import { Poppins, JetBrains_Mono } from 'next/font/google';3import './globals.css';45const poppins = Poppins({6 subsets: ['latin'],7 weight: ['400', '500', '600', '700'],8 display: 'swap',9 variable: '--font-poppins',10});1112const jetbrainsMono = JetBrains_Mono({13 subsets: ['latin'],14 weight: ['400', '700'],15 display: 'swap',16 variable: '--font-mono',17});1819export const metadata: Metadata = {20 title: 'My V0 App',21 description: 'Built with V0 and Next.js',22};2324export default function RootLayout({25 children,26}: {27 children: React.ReactNode;28}) {29 return (30 <html31 lang="en"32 className={`${poppins.variable} ${jetbrainsMono.variable}`}33 >34 <body className={poppins.className}>35 {children}36 </body>37 </html>38 );39}Best practices to prevent this
- Always use next/font/google or next/font/local instead of CSS @import or link tags for fonts in V0 projects
- Set the display: 'swap' option to ensure text remains visible while the font loads
- Use CSS variables (the variable property) so Tailwind can reference the font throughout the project
- Load only the font weights you actually use — each additional weight increases the font file size
- Prefer .woff2 format for custom font files — it offers the best compression and broadest browser support
- Apply the font className to the html element so it cascades to all child elements consistently
- Test font rendering on slow connections using Chrome DevTools Network Throttling to verify no layout shift occurs
Still stuck?
Copy one of these prompts to get a personalized, step-by-step explanation.
I want to use the Poppins and JetBrains Mono fonts in my V0 Next.js project. How do I configure next/font/google in layout.tsx and integrate the CSS variables with Tailwind CSS so I can use font-sans and font-mono utilities?
Frequently asked questions
How do I fix layout issues from overlapping elements caused by custom fonts?
Layout overlap usually occurs when a custom font has different character metrics than the fallback font, causing text to be taller or wider than expected. Using next/font automatically calculates a size-adjust value that matches the custom font to the fallback, eliminating this shift.
Can I use multiple custom fonts in a V0 project?
Yes. Import each font separately from next/font/google or next/font/local, assign each a unique CSS variable, and apply both variables to the html element. Reference them in Tailwind via fontFamily.sans, fontFamily.serif, or fontFamily.mono.
Why does my font work in V0 preview but not after export?
If you loaded the font via a CDN link tag, the V0 preview may cache it while the exported project cannot access it. Switch to next/font which self-hosts the font files within the build output, ensuring they work everywhere.
What font format should I use for custom font files?
Use .woff2 as the primary format. It offers the best compression and is supported by all modern browsers. Include .woff as a fallback only if you need to support very old browsers.
How do I add custom fonts to a V0 project using Tailwind utility classes?
Configure next/font with the variable property to create a CSS variable (e.g., --font-poppins). Then add that variable to your Tailwind config's fontFamily section. This lets you use classes like font-sans throughout the project.
Does using next/font improve page load performance?
Yes. next/font downloads fonts at build time and self-hosts them, eliminating external DNS lookups and network requests to Google Fonts CDN. It also injects preload tags and calculates size-adjust values to prevent Cumulative Layout Shift.
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