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If your Open Graph image looks cropped on LinkedIn or Discord, first check the image URL and its actual dimensions in the deployed page’s HTML—not just your Next.js component. LinkedIn documents a 1.91:1 image ratio, a minimum size of 1200 × 627 pixels, and a 5 MB maximum; it also displays images narrower than 401 pixels as thumbnails. Discord’s current official crop and size rules are not established here, so treat its preview as something to verify rather than assuming a particular required ratio.
Why the same Open Graph image can look different
An Open Graph preview is assembled by the destination platform from a page’s metadata and the linked image. The platform may present the same source image differently in different sharing contexts. A preview that looks cropped therefore does not necessarily mean your Next.js source image itself was altered.
There are two useful distinctions: whether the page points to the intended image, and whether the destination platform presents that image as expected. Check both. LinkedIn publishes image guidance; the evidence here does not establish an official Discord image ratio, size threshold, or crop rule.
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What LinkedIn’s image guidance says
LinkedIn’s sharing guidance asks for og:title, og:image, og:description, and og:url. It recommends an image ratio of 1.91:1, minimum dimensions of 1200 × 627 pixels, and a maximum file size of 5 MB. LinkedIn says images less than 401 pixels wide display as thumbnails. These figures are from LinkedIn Help, whose page was last updated two years before the cited access: LinkedIn’s shareable-website guidance.
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If LinkedIn shows a small thumbnail, confirm that the og:image URL resolves to your intended full-size image, not a small derivative. If a correctly sized image is missing altogether, also check whether LinkedIn can fetch it; correct dimensions alone do not ensure crawler access.
What is—and is not—established about Discord
The available evidence does not verify a current official Discord image ratio, size threshold, or crop specification. That means advice to use a particular Discord-specific dimension should be treated as a practical experiment, not an official rule. After correcting the page metadata and image, inspect the actual Discord preview rather than assuming LinkedIn’s published requirements define Discord’s behavior.
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Check the deployed page before changing the artwork
- Inspect the shared route’s final HTML. Open the deployed page in a browser, use developer tools to inspect its document head, and find the actual
og:imagevalue. Confirm that the metadata belongs to the exact route being shared and points to the intended image. Next.js explains how to inspect generated metadata in its metadata and Open Graph images guide. - Verify the image itself. Check its intrinsic pixel dimensions, aspect ratio, and file size. For LinkedIn, compare them with its 1200 × 627 minimum, 1.91:1 recommendation, and 5 MB maximum. Keep important text and subjects away from the edges as a practical design precaution, not as a documented LinkedIn or Discord safe-zone requirement.
- Open the image URL without signing in. Fetch it as a public, unauthenticated resource and confirm that it serves the expected image bytes. LinkedIn warns that a site may block its image fetch or put an image in a protected directory or website. See LinkedIn’s troubleshooting guidance.
- Deploy, then inspect the preview again. The image target, metadata, and public access all need to be correct. Do not assume a preview will refresh immediately: Next.js says generated metadata-image routes are cached by default unless Dynamic APIs or dynamic configuration affect the route, and no authoritative LinkedIn or Discord refresh interval is established here.
Set the Open Graph image in Next.js App Router
Next.js App Router supports both route-segment image files and metadata configured through the Metadata API. Its file convention emits image metadata tags, including type and dimensions, for static image files. The most specific route-segment image takes precedence over one defined higher in the route tree. See the Next.js Open Graph image convention and the Next.js metadata guide.
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Option 1: Add a static route image
Place a supported image file in the route segment that should use it. For example:
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app/opengraph-image.jpg
app/blog/opengraph-image.jpgNext.js documents JPG, JPEG, PNG, and GIF support for this convention. A colocated file avoids separately synchronizing its dimensions with a hand-written image URL. The convention has a documented 8 MB maximum; if the same file is intended for LinkedIn, keep it within LinkedIn’s stricter 5 MB limit.
Option 2: Generate a route-specific image
For generated images, create an opengraph-image.tsx route. The documented example exports alt, size, and contentType, and uses ImageResponse; its example size is 1200 × 630 pixels. That is an example, not a universal platform requirement. Next.js notes that ImageResponse supports flexbox and a subset of CSS, so arbitrary browser CSS should not be assumed to render identically. Generated metadata-image routes are statically optimized by default unless Dynamic APIs or uncached data affect the route. See the file convention documentation.
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app/blog/[slug]/opengraph-image.tsxNext.js documents an 8 MB maximum for an opengraph-image file. A generated image intended for LinkedIn should also meet LinkedIn’s 5 MB cap; the tighter destination limit governs.
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You can also define Open Graph images through metadata or generateMetadata. Next.js documents image entries with a URL, width, height, and optional alt text; the URL must be absolute. Use values that describe the image actually served, and ensure the metadata applies to the shared route. See the Next.js Metadata API.
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Common causes and the right fix
| What you see | What to check | What to do |
|---|---|---|
| LinkedIn shows a thumbnail | Whether the image linked by og:image is less than 401 pixels wide or points to a small derivative |
Use the intended full-size image; LinkedIn says images narrower than 401 pixels display as thumbnails. |
| LinkedIn crops or presents the artwork differently than expected | The image’s real dimensions and ratio, plus whether the correct route metadata is deployed | For LinkedIn, use its 1.91:1 recommendation and at least 1200 × 627 pixels; keep important content away from the edges as a design precaution. |
| The preview has no image | Whether the public image URL serves the expected bytes and whether a crawler can access it | Remove access barriers or use a publicly fetchable image location; LinkedIn identifies blocked fetching and protected locations as possible causes. |
| Discord’s preview differs from LinkedIn’s | The actual deployed metadata and Discord preview | Correct the shared page’s metadata, then inspect Discord’s result. Do not treat an unverified Discord dimension recommendation as an official specification. |
Keep the platform limits distinct
| Context | Image guidance or limit | Source and qualification |
|---|---|---|
| LinkedIn sharing image | 1.91:1 recommended ratio; minimum 1200 × 627 pixels; maximum 5 MB; images under 401 pixels wide display as thumbnails | LinkedIn Help; page last updated two years before cited access. |
Next.js App Router opengraph-image |
8 MB maximum | Next.js file convention; documentation last updated February 27, 2026. |
| Next.js generated-image example | 1200 × 630 pixels | Next.js file convention; example size, not a universal platform requirement; documentation last updated February 27, 2026. |
| Discord image crop or size rule | Not established | No current official Discord specification is verified here; a secondary guide is not an official rule: secondary platform-preview guide. |
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