Free tool

See how your link looks when it's shared.

Paste a page URL. We read its Open Graph and X card tags the way Facebook, LinkedIn, X and Slack do, and check the preview image.

What it checks

Every rule is fixed and published.

01
Required Open Graph tags
og:title, og:description and og:image decide what a pasted link shows. Missing one gives a bare link or a guessed snippet.
02
Title and description length
Platforms cut long text. Keep the title near 60 characters and the description under 200.
03
Image loads and is supported
The og:image must answer 200 as a PNG, JPEG, GIF or WebP under 5 MB. SVG is ignored by Facebook, LinkedIn and X.
04
Image size and shape
1200 × 630 px (1.91:1) fills a large card. Smaller or squarer images are shrunk or cropped.
05
X card type
Without twitter:card set to summary_large_image, X shows a small card even when the image is large.
06
Absolute https URL and alt text
Relative or http:// image paths fail on some crawlers. og:image:alt describes the image for screen-reader users.

No AI judges your page. Same page, same result, every time. This tool checks one thing; the free scan runs all 51 checks across 9 dimensions.

Questions

Common questions.

Why does my link still show an old preview?

Platforms cache the preview. After fixing the tags, re-scrape the URL in each platform's own debugger (Facebook Sharing Debugger, LinkedIn Post Inspector); X refreshes on its own after a while.

Does this run my page's JavaScript?

No. Social crawlers read the HTML your server sends and don't run JavaScript, so this checker does the same. Tags added only by client-side code won't show up here, and won't show up when your link is shared either.

Is the preview exact?

It is a generic large-card approximation. Each platform crops and styles the card a little differently. The findings, not the mock-up, are the check.

Do you store the URL I check?

No. We keep your IP address and the time of each check for up to an hour, to enforce a limit of 10 checks an hour. The URL isn't stored.

Check the rest of your launch page.

This is one of 51 checks. The free scan covers messaging, conversion, trust, speed, accessibility and more.

Just your email, no password · Usually under 2 minutes · We only read public pages