Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteThe App Router can create Open Graph (OG) tags automatically when you place a specially named image in the app directory. Use a static opengraph-image.png for a fixed design, an opengraph-image.tsx route with ImageResponse for generated artwork, or metadata.openGraph.images when an image already exists at an absolute URL. The sections below show each approach, dynamic blog-post images, alt text, dimensions, caching, limits, and fixes for common failures.
Choose the right Next.js OG-image method
| Method | Best for | Where it lives | Important behavior |
|---|---|---|---|
| Static file | A logo or design that rarely changes | app/opengraph-image.jpg (or another supported extension) |
Discovered automatically; a file in a deeper route segment overrides a higher-level file. |
| Generated route | Titles, authors, prices, or other per-page data | app/opengraph-image.tsx or a segment folder |
Returns an image with ImageResponse; metadata routes are cached by default. |
metadata.openGraph.images |
An image already hosted elsewhere | A page or layout metadata export | Each image URL must be absolute. |
generateImageMetadata |
Several OG variants for one segment | The segment’s metadata-image files | Returns variant IDs; the image function renders the selected ID. |
Add a static Open Graph image
- Create an image in PNG, JPEG, JPG, or GIF format.
- Place it at
app/opengraph-image.pngfor the whole application, or inside a route segment such asapp/blog/opengraph-image.png. - Optionally add
app/opengraph-image.alt.txtbeside the image for static alternative text. - Build or run the application and inspect the generated page source for
og:image, dimensions, and type.
Next.js resolves the most specific matching file. Therefore app/blog/opengraph-image.png is used for blog routes even when app/opengraph-image.png exists. Keep each asset below the documented 8 MB Open Graph-image maximum. Twitter images have a separate 5 MB maximum.
Generate an image with opengraph-image.tsx
The easiest generated-image API is ImageResponse from next/og. Export alt, size, and contentType so Next.js can emit the corresponding metadata.
import { ImageResponse } from 'next/og'
export const alt = 'About Acme'
export const size = { width: 1200, height: 630 }
export const contentType = 'image/png'
export default function Image() {
return new ImageResponse(
<div
style={{
fontSize: 128,
background: 'white',
width: '100%',
height: '100%',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
}}
>
About Acme
</div>,
)
}The official example uses 1200 × 630 pixels, a broadly accepted OG canvas. The renderer supports flexbox and a subset of CSS properties; it does not provide arbitrary browser CSS, so do not depend on CSS Grid or unsupported effects. Put fonts and other assets where the runtime can load them, and keep the component deterministic when you want stable caching.
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Create a dynamic image for every blog post
Place the metadata route in the post segment, for example app/blog/[slug]/opengraph-image.tsx. The route can read the segment parameter and render a title. In current Next.js 16 documentation, params resolves to a promise.
import { ImageResponse } from 'next/og'
type Props = {
params: Promise<{ slug: string }>
}
export const size = { width: 1200, height: 630 }
export const contentType = 'image/png'
export default async function Image({ params }: Props) {
const { slug } = await params
const title = slug.replaceAll('-', ' ')
return new ImageResponse(
<div
style={{
background: '#111827',
color: 'white',
width: '100%',
height: '100%',
padding: '72px',
display: 'flex',
flexDirection: 'column',
justifyContent: 'center',
}}
>
<div style={{ fontSize: 34, color: '#93c5fd' }}>Itech Guides</div>
<div style={{ fontSize: 72, fontWeight: 700 }}>{title}</div>
</div>,
)
}For production titles, fetch the post record rather than deriving text from the slug. If that fetch uses dynamic APIs or uncached data, the metadata route becomes dynamic; otherwise generated metadata routes are cached by default. Decide whether freshness or cacheability matters before adding per-request data.
Set an existing image through metadata
When a CDN or image service already hosts the artwork, export metadata from the page or layout. The URL must include its scheme and host.
import type { Metadata } from 'next'
export const metadata: Metadata = {
openGraph: {
images: [
{
url: 'https://example.com/og.png',
width: 1200,
height: 630,
alt: 'Example article preview',
},
],
},
}This method does not copy the image into your repository. Ensure the host serves the file publicly, returns the correct content type, and does not require a browser-only session.
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Supply alt text, dimensions, and content type
Static files
Use a neighboring opengraph-image.alt.txt file when a static image needs alt text. Next.js derives image type, width, and height from the special file.
Generated files
Export all three values from the metadata-image module:
alt: a concise description for metadata consumers.size: an object such as{ width: 1200, height: 630 }.contentType: the generated MIME type, for exampleimage/png.
External files
Put alt, width, and height on each openGraph.images object. Use an absolute URL, not /images/og.png.
Generate multiple OG variants
Use generateImageMetadata when one segment needs several images, such as light and dark designs or language-specific cards. Return one object per variant with an id, alt, size, and contentType; the default image function receives the selected ID and can branch on it. Keep IDs stable so cached URLs do not change unexpectedly.
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Verify the result before sharing a URL
- Run a production build, because metadata behavior can differ from development.
- Open the rendered HTML and confirm
og:image,og:image:alt,og:image:width, andog:image:heightwhere applicable. - Request the image URL directly. It should return the declared content type and a 200 response without authentication.
- Check the final byte size against the 8 MB OG limit (and 5 MB Twitter limit when the same asset is used there).
- Test a nested route to confirm the intended segment-specific image wins.
Troubleshoot common failures
No og:image tag appears
Check spelling and location: the convention is exactly opengraph-image in the app tree. Confirm you are using the App Router and that a nearer route segment is not shadowing the file with another metadata definition.
The wrong image is selected
Look for a more specific opengraph-image file or an openGraph.images export in the page or layout. The more specific segment takes precedence; remove or update the competing definition.
Generated image returns an error
Reduce the component to supported flexbox styles, valid JSX, and serializable values. Unsupported CSS, unavailable fonts, or code that only works in a browser can fail inside the image renderer.
Dynamic titles never update
A cached route can continue serving an earlier result. Review whether the function uses cached data, Dynamic APIs, or uncached fetches, and choose an explicit caching strategy that matches your update requirements.
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Social services show a blank preview
Request the generated URL directly and inspect status, content type, redirects, and size. Remove authentication, avoid expiring URLs, and ensure the response completes within the crawler’s time budget.
External URL is rejected
Replace relative paths with a complete https:// URL and verify that the host is reachable without cookies or a login.
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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpimport requests
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- Prefer static files when the artwork is unchanged: there is no per-request data fetch and the result is straightforward to cache.
- Use generated routes for personalized cards, but cache stable post data and avoid unnecessary remote work in the image function.
- Keep dimensions and output type consistent across variants so crawlers and social previews behave predictably.
- Test cold and warm requests in production; a successful local render does not prove that a social crawler can reach every dependency.
- For external images, monitor the host’s availability and URL permanence because Next.js only records the reference.
Frequently Asked Questions
Can I use both a static file and metadata.openGraph.images?
Yes, but define an intentional precedence strategy. A route-segment image is automatically discovered, while explicit metadata can add or override images; inspect the rendered head to confirm the final result.
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What dimensions should an OG image use?
The documented Next.js ImageResponse example uses 1200 × 630 pixels. Use that size unless your design system has a specific, tested reason to differ.
Does an OG image route run in the browser?
No. It runs in Next.js’s metadata-image environment, so browser-only APIs and unsupported CSS are unsuitable.
How do I make a post image change immediately after editing content?
Ensure the image function is not relying solely on cached data. Dynamic APIs or uncached data make the metadata route dynamic; otherwise configure a cache or revalidation approach appropriate to your deployment.
Quick Recap
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