Link Preview Checker for X, LinkedIn and Bluesky
This link preview checker shows the card your URL gets on X, LinkedIn and Bluesky side by side, then checks the Open Graph tags, the preview image and the redirects behind them.
How to check a link preview
Paste the URL below. The checker reads og:title, og:description, og:image, og:url and the twitter: tags, downloads the image to confirm it loads and fits, and draws each platform's card. Fix whatever fails, check again, then refresh any platform that cached the old preview.
Your previews and the checks appear here.
What each platform reads
| Platform | Tags | Worth knowing |
|---|---|---|
| X | twitter:card, twitter:title, twitter:description, twitter:image, with og: tags as fallback | twitter:card picks the layout. Use summary_large_image for the wide image card. |
| og:title, og:image, og:description, og:url | Its help page lists a 1200 x 627 px minimum, a 1.91:1 ratio and 5 MB maximum. Previews are cached; refresh them in Post Inspector. | |
| Bluesky | page tags, read by Bluesky's card service, cardyb.bsky.app | The card is saved inside the post, with a thumbnail capped at 1,000,000 bytes by the record format. |
Want one platform in depth? Try the X card validator, the LinkedIn Post Inspector alternative or the Bluesky link preview checker.
What the checker tests
Page status
A 403, 429 or 5xx means crawlers get an error page instead of your tags.
Redirect chain
Every hop to the final page, so you can share the final URL directly.
Title and description
og: tags first, then twitter: tags and the page title as fallbacks, with an approximate length warning.
Image tag
Missing og:image, relative paths, plain http and protocol-less URLs.
Image download
Whether it loads, whether it is really an image, its size in bytes and its pixel size.
Card layout
twitter:card for X, the 401 px thumbnail cutoff for LinkedIn and the card Bluesky returns.
Post it to X, LinkedIn and Bluesky at once
Once the preview looks right, write the post once in OpenTweet and schedule it to all three networks, each checked against that network's limits.
7-day free trial, then from $11.99/mo. LinkedIn and Bluesky on every plan.
Link Preview Checker FAQ
What does a link preview checker do?
It fetches a page the way a social crawler does, reads the Open Graph and Twitter Card tags, and shows the card each platform would build from them. This one also downloads the preview image to check that it loads, its file size and its pixel size, and lists any redirects on the way.
Which tags control a link preview?
Open Graph tags do most of the work: og:title, og:description, og:image and og:url. LinkedIn's help center lists those four. X also reads twitter:card to pick the layout, and twitter:title, twitter:description and twitter:image when you want X to show something different.
Why does my link show a different preview on each platform?
Each platform fetches and caches the page on its own, at different times, and lays the card out differently. One may still hold an old cached version, and X uses twitter: tags where they exist. Check the tags here, then refresh the cached copy on the platform that is out of date.
Why is the preview image missing?
Usually the og:image tag is missing, uses a relative path, returns an error or a login page, or the file is too large. A firewall that blocks crawlers has the same effect. The checks list names the exact cause for your URL.
How is the Bluesky card checked?
Your browser asks cardyb.bsky.app, the card service the Bluesky app uses while you write a post, for this URL's card, and the checker shows what it returns. Bluesky's record format caps a link card thumbnail at 1,000,000 bytes, so the checker flags larger images.
Is the checker free and does it need a login?
Yes, it is free and needs no login or social account. It fetches only the URL you enter and the image that page points to, up to 20 checks an hour.
Will a link I schedule in OpenTweet show a card?
On X, yes: X reads the link in the post text and builds the card itself. On LinkedIn and Bluesky the publishing app has to attach the card data, and OpenTweet publishes text with optional images there, so the link shows in the text without a card. Attach an image when you want a visual on every platform.
Related tools and guides
LinkedIn Post Inspector Alternative
Find why a LinkedIn link preview is missing or stale.
X Card Validator
Check twitter:card tags and preview the X card.
Bluesky Link Preview Checker
See the card Bluesky builds for your link.
Social Media Character Counter
One draft counted for X, Bluesky and LinkedIn.
Cross-Posting
One draft to X, Bluesky and LinkedIn.