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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driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteTo generate a website preview image for link sharing, create an image file, publish it at a stable public URL, and point your page’s og:image metadata to that URL. The image is not automatically a screenshot of your site: it is a separate asset that social networks and messaging apps may use when they build a link preview. Add the metadata in the page’s initial HTML, then check the result on the platforms where you plan to share the link.
What a website preview image is—and what it is not
In this guide, “website preview image” means the image associated with a page when its URL is shared in a social network or messaging app. The Open Graph Protocol lets a webpage be represented as a rich object using properties such as og:title, og:type, og:image, and og:url. The og:image value identifies an image asset; it does not instruct a service to take a screenshot of the page. See the Open Graph Protocol.
A designed preview image can carry your visual identity and illustrate a page, while a screenshot shows the actual rendered site at a particular moment. Either may be useful, but they serve different purposes. If your aim is a branded share card, make or edit an image. If you specifically want a current screenshot of a webpage, use a browser capture workflow or a screenshot service.
Choose how to make the image
For one page or a small number of pages, create an image in a design or image-editing tool and save it as a web-accessible file. For a repeatable workflow across many pages, generate or edit images through an API and connect that process to your publishing system. The right choice depends on whether you need hands-on art direction or repeatable production; neither route changes how the webpage declares its image.
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Create a one-off image
A prompt-based image tool can help produce a starting visual that you then review and edit. ChatGPT Images supports image creation and editing from a prompt, aspect-ratio selection, and saving or sharing; its Help Center says it is available on web, iOS, and Android. Availability and interface details can change, so check the current ChatGPT Images guidance.
Give the image tool a concrete brief: what the page is about, who will see the preview, your brand colors, the subject and composition, and the intended crop. Ask it to keep important visual details away from the edges, where different preview layouts may crop them. If you need words in the art, inspect the spelling and legibility at small display size rather than assuming a generated image will render text perfectly. OpenAI’s image prompting guidance recommends checking exact text, identities and details, and whether an edit changed only what was requested.
Generate images with an API
For a single prompt or edit, OpenAI’s Image API is designed for image generation and editing. The Responses API image-generation tool supports multi-turn editing and flexible image File ID inputs. Both guides describe controls for output size, quality, format, and compression. Model availability, names, access and pricing can change; consult the current Image generation guide and Image generation tool guide before building around a particular model.
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For a production workflow, decide where the image is created, reviewed, stored and associated with each page. Keep the final asset at a stable URL that your intended preview crawlers can fetch. The source materials here do not establish a particular dynamic image deployment design, so choose one based on your stack and verify access from the services that matter to you.
Design for a preview, not a full-size page
The Open Graph Protocol does not prescribe one universal image size. Platform rules and display contexts differ. Apple’s technical note for Messages recommends preview images at least 900 pixels wide; that is Apple-specific guidance, not a requirement for every social network or messaging app. Apple also says associated resources and preview images have constraints that can affect whether content appears. The note recommends keeping the main resource at the linked page within 1 MB and total associated resources—such as icons, images and videos—within 10 MB. These are Apple Messages recommendations published in 2024, not universal web limits. See Apple’s TN3156 technical note.
- Make the subject and visual hierarchy understandable when the image is shown small.
- Leave breathing room around important content so a crop does not cut it off.
- Use brand elements consistently, but do not depend on tiny lettering to communicate the page’s main point.
- Use the page’s metadata for its title and description rather than putting essential copy into the artwork. Apple’s TN3156 advice is: “Avoid text in preview images.”
- Keep the file at a stable public URL, and ensure the server returns the image rather than a login screen or an HTML error page.
Apple’s note also says icons should be at least 108 pixels per side and that images under 150 pixels wide may be ignored or displayed as icons. Those figures concern Apple Messages previews; they should not be treated as specifications for other services.
Add Open Graph metadata to the page
After exporting the image and placing it at a public URL, add its absolute URL to the page’s <head>. Set the core properties for the page and image. The Open Graph Protocol lists og:title, og:type, og:image, and og:url as required properties. The image alt text, secure URL, MIME type, width and height are image-related properties; add those that apply and that you can provide accurately.
<head>
<title>A Practical Guide to Example Topic</title>
<meta property="og:title" content="A Practical Guide to Example Topic">
<meta property="og:type" content="article">
<meta property="og:url" content="https://example.com/guides/example-topic">
<meta property="og:image" content="https://example.com/images/example-topic-preview.jpg">
<meta property="og:image:alt" content="A blue illustrated guidebook beside a laptop">
<meta property="og:image:type" content="image/jpeg">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="630">
</head>The image URL and dimensions above are examples, not universal format or size rules. Replace the sample domain, page details, image description, MIME type and dimensions with the actual values. The alt description should describe the image itself, not act as a caption or repeat the page title. The Open Graph specification says that if a page specifies an image, it should also specify its alt text.
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Make sure crawlers can discover the metadata
Some preview systems inspect the HTML delivered for the linked page rather than running the page’s JavaScript. Apple says Messages link-preview metadata must be available directly on the linked page: its preview extraction does not run JavaScript or follow meta redirects. If your framework adds Open Graph tags only after client-side JavaScript executes, Apple Messages may not see them. Render the tags into the initial HTML response for that page, then check the HTML actually served to an unauthenticated request.
Also check that the image itself can be fetched at its declared URL. A correct og:image tag cannot help if the asset is private, blocked, redirected unexpectedly, or returns an error. Do not assume that a browser showing the page proves a third-party crawler can access both the HTML and image.
Check the result before relying on it
- Inspect the image file. Review the crop, composition, brand details and any text at a small size. Confirm that the exported file is the intended version.
- Fetch the page’s initial HTML. Confirm that the Open Graph tags are present in the response itself, especially if the site uses client-side rendering.
- Open the image URL directly. Verify that it loads without signing in and resolves to the intended image.
- Check the metadata values. Make sure
og:imagepoints to the right asset,og:urlidentifies the shared page, andog:image:altdescribes the visual content. Confirm dimensions and MIME type if you include them. - Share the published page on the target services. Look at the actual preview in the social networks or messaging apps that matter to your audience. The Open Graph Protocol defines metadata; it does not guarantee that all platforms will crop or display an image identically.
Or skip the browser setup
If by “website preview image” you mean a screenshot of the live page rather than a designed Open Graph asset, ScreenshotNeo can return a screenshot with one GET request. It is a screenshot API and MCP server by Yorker Media; it does not replace the separate work of creating and adding Open Graph metadata for a share card. See the ScreenshotNeo documentation for API details.
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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webpCookie and consent banners, newsletter popups and chat widgets can be removed before capture, with each step configurable. Bot checks, blank pages, timeouts, failed loads and cache hits are not billed; response headers indicate the page verdict and billing status. Its MCP server provides screenshot and page-information tools for AI agents. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000 shots. Sign up for free and get 1,000 screenshots a month with no card.
Troubleshooting common preview problems
The preview has no image
- Check for a correctly spelled
og:imageproperty in the page’s initial HTML. - Open its absolute URL directly and make sure the image is publicly fetchable.
- Check for access restrictions, redirects or server responses that return a page instead of an image.
- Test the share again on the platform where the problem occurs; each service may interpret and cache page metadata differently.
The preview shows an old image
First confirm that the page now serves the intended og:image value and that the image URL serves the new file. A platform may retain previously fetched preview data, so changing the page alone may not immediately change what an existing share displays. Verify the result with a newly shared URL and the target service’s available preview-checking or refresh mechanism, if it offers one.
Apple Messages misses the title or image
Check that the metadata is part of the linked page’s original HTML, not inserted only by JavaScript. Apple’s TN3156 says its link preview extraction does not run JavaScript or follow meta redirects. Also verify the linked page and image meet Apple’s resource guidance, while remembering that those recommendations apply to Messages rather than every platform.
The crop looks wrong or the text is hard to read
Rework the source art with the focal point and any essential detail farther from the edges. Preview it at a small size, and remove or enlarge lettering that is not legible. Because services may present different crops and sizes, test the live share in its actual destination rather than judging only the full-resolution file.
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Can I use a screenshot of my site as its preview image?
Yes. A screenshot can be the image referenced by og:image, provided it is hosted at an accessible URL and the page metadata points to it. It will show the captured page state rather than a separately art-directed share image.
Does adding an Open Graph image guarantee that every app displays it?
No. Metadata gives preview systems information about the page, but each service decides how to fetch and render that information. Test the services you rely on.
Does the Open Graph specification require a particular file format?
The specification’s basic image property identifies an image URL and includes optional image-type metadata; the cited material does not establish one universally required format for every platform. Use a format supported by your target services and state its MIME type accurately if you provide it.
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