Recommended Free Tools
A link preview checker shows how a webpage’s metadata may be used to build a social sharing card. Use one to spot missing or unsuitable title, description, and image information—but treat its preview as a diagnostic, not a guarantee that LinkedIn and every other platform will display the same card. For a reliable check, inspect the page’s Open Graph tags, verify the image is retrievable, and use the platform’s own inspector when available.
What a link preview checker checks
When someone shares a webpage, a social platform may read metadata from that page to assemble a card with a title, description, and image. A link preview checker is a diagnostic tool: it examines a URL and may show the metadata it finds alongside a simulated card. The exact platforms and checks vary by tool, so read its result as evidence about what it inspected—not as a promise about what a live post will look like.
The Open Graph protocol identifies four basic properties: og:title, og:type, og:image, and og:url. Together, they describe a title, the type of object, its representative image, and its canonical identifier. These are a sensible first set to check when a shared link looks wrong. Other metadata can also be relevant to how a particular service builds a preview.
LinkedIn says its share box relies on Open Graph and/or oEmbed data for the most accurate title, description, and image. When those data are absent, LinkedIn may show other page content or no preview content. A checker can help reveal what metadata is present, but it cannot establish that every platform will accept or render it identically.
#1 Best Overall
How to check a link preview
- Run the page URL through a checker. Use the public page address you intend to share, not a local preview or an editor-only address. Note which platform or card format the tool claims to simulate.
- Review the raw metadata. Confirm that the page has the intended
og:title,og:type,og:image, andog:url. Check the description field too if the tool exposes one. A plausible-looking card alone does not tell you whether the source tags are correct. - Verify the chosen image. Make sure the metadata names the image you meant to use and that the image URL and page can be retrieved by the platform. A checker’s card preview is not proof that a platform’s crawler can fetch the same resource.
- Inspect with the platform itself. For LinkedIn, use Post Inspector to see what its extraction process found and refresh its URL preview. LinkedIn’s extraction may evaluate multiple candidate values, validate them, and fall back to other page content when preferred values do not meet its criteria.
- Check the real share composer. Before publishing, paste the link into the platform’s composer and inspect the card it offers. LinkedIn notes that a link can still be shared even if it cannot retrieve a preview image.
If the checker and platform disagree, prioritize the platform-specific inspection and composer for that platform. The checker remains useful for finding likely causes, especially absent tags or an unexpected image, but a simulated card is not a cross-platform rendering guarantee.
Which metadata should you verify?
Open Graph essentials
og:title: The title intended to appear for the shared object. Check for a missing, stale, or unintended value.og:type: The declared kind of object. Confirm it describes the page appropriately.og:image: The representative image. Confirm both that it points to the intended asset and that the platform can retrieve it.og:url: The canonical identifier for the object. Check that it identifies the page you want associated with the shared card.
These are the protocol’s required basic properties, not a guarantee that each service uses them in isolation. LinkedIn may consider Open Graph or oEmbed data and can use alternatives or fallback content. A checker that displays raw tags is therefore more informative than one that only shows a rendered mockup: it helps distinguish what the page declares from what the tool chooses to illustrate.
LinkedIn’s image frame
LinkedIn Help presents 1200 × 627 pixels, or a 1.91:1 aspect ratio, for its preview image frame. Treat that as LinkedIn-specific guidance, not a universal requirement for every social platform. If a checker flags an image size, establish which platform’s rule it is applying before changing the asset.
Why is my link preview showing the wrong image?
Start by checking the page’s og:image value, then determine whether the platform can retrieve that image. A wrong image can be caused by metadata naming an unintended asset, a platform finding a different candidate value, or the platform using fallback content. LinkedIn’s published explanation says it may evaluate multiple candidate metadata values, validate them, and fall back to other page content.
- Inspect the raw metadata and confirm the intended image is specified.
- Check that the image URL is accessible to the platform, rather than only to a signed-in visitor or a local browser session.
- Use the relevant platform inspector. For LinkedIn, Post Inspector shows what its extraction process found.
- Review the card offered by the actual share composer before publishing.
Changing a tag is not the same as changing a card already attached to a post. On LinkedIn, use Post Inspector to refresh the URL preview for future posts after updating metadata; refreshing does not rewrite the preview on existing posts.
How do I refresh a stale LinkedIn preview?
After changing a page’s tags or sharing a URL, LinkedIn says its cache may need to refresh and advises allowing up to 48 hours. If the displayed preview remains stale, use LinkedIn Post Inspector to refresh the URL preview. That refresh affects new posts; an existing post keeps its earlier preview.
When investigating, compare the inspector’s extracted title and image with the page’s current tags. If they differ, confirm that the published page and image are reachable and that the inspector is evaluating the URL you actually plan to share. Avoid treating a browser reload or a third-party checker’s updated simulation as proof that LinkedIn’s stored preview has changed.
How to choose a link preview checker
Different checkers can answer different questions. Before relying on one, see whether it:
Best Value
- simulates the platform where you plan to share;
- shows the raw Open Graph and Twitter Card values, if applicable;
- checks whether the image can be retrieved or flags dimensions;
- clearly separates a simulated card from an actual platform fetch; and
- offers actionable tag-level diagnostics rather than only a visual mockup.
These are comparison criteria, not a claim that a particular third-party checker performs each check. Tool descriptions explain their stated features, but a feature list does not independently verify how well a tool works. For a platform-specific answer, use that platform’s own inspector where one is available.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Or skip the browser setup
ScreenshotNeo is a website screenshot API and MCP server, not a link-preview metadata checker. A screenshot can help you inspect how the page itself looks in a browser, but it does not replace reading Open Graph tags or using LinkedIn Post Inspector. If you also need a clean visual capture, one GET request can return an image or PDF. See the ScreenshotNeo documentation.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpScreenshotNeo accepts cookie or consent banners like a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each of those steps can be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits cost nothing, and each response identifies the page verdict and billing status in headers. Its MCP server includes tools for AI agents to take screenshots, get page information, and capture PDFs. The free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots.
Learn about ScreenshotNeo, or sign up for 1,000 free screenshots a month with no card.
Troubleshooting link-preview problems
| Symptom | What to check | What to do |
|---|---|---|
| The preview has no title, description, or image. | Check whether the page exposes Open Graph or oEmbed data and whether the platform can retrieve the page. | Correct missing or unsuitable metadata, then inspect it with the target platform’s utility where available. |
| The card shows an unexpected image. | Inspect og:image, image accessibility, and any alternate values or fallback content the platform may use. |
Ensure the intended image is named and fetchable, then review the platform inspector and share composer. |
| A checker shows a good card but the platform does not. | Determine whether the checker simulated a card or actually fetched data through the platform’s own process. | Use the platform’s inspector and composer; treat the checker as an initial diagnostic rather than authoritative rendering. |
| LinkedIn shows an old card after metadata changed. | Check what Post Inspector extracts for the exact shared URL and allow time for cache refresh. | Refresh the URL preview using Post Inspector for future posts. LinkedIn says changes may take up to 48 hours; existing posts retain their earlier preview. |
| LinkedIn shows no preview image. | Check image availability and LinkedIn-specific presentation guidance; the platform notes that a link can still be shared without a retrieved preview image. | Fix the image metadata or retrieval issue, then verify in Post Inspector and the share composer. |
Frequently Asked Questions
Does a link preview checker publish or change my social post?
No. It diagnoses or simulates metadata for a URL; publishing and any platform-side cache refresh are separate actions.
What does og:type mean?
It declares the kind of object represented by the page in Open Graph metadata.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
