SiteVerdict — Social Link Preview Checker

See how your link is likely to look on Facebook, LinkedIn, X, WhatsApp and Slack before you post it, and get the tags that fix it.

Common problems are a missing image, a cropped logo, a title cut off mid-word, or a WhatsApp preview with no thumbnail. Each one costs clicks on every share. Paste your URLs to get, for each page:

• one preview mockup per platform;
• a 0–100 score and a status per platform (ok, degraded or broken);
• every problem, with its fix and paste-ready meta tags.

How to use it

1. Add one or more page URLs under URLs.
2. Set Max cost per run in the run options (each analysed URL costs $0.004).
3. Click Start. Open the Output tab for scores and fixes, or the REPORT record for all mockups on one page.

The example input (the same input the console pre-fills) costs $0.004 and took about 4 seconds on 15 Oct 2026:

{ "urls": [{ "url": "https://www.python.org/" }] }

Not sure yet? Set Mode = Sample to see the full output for two built-in demo pages, free.

Who it is for

• Content and social teams. Check a blog post or landing page before a campaign goes out.
• SEO and web agencies. Bulk-check every template (home, product, article, category) after a redesign or plugin update.
• E-commerce. Find product pages whose images are too small, too heavy or the wrong ratio for social shares.

What it checks

Area	Checks
Open Graph	og:title, og:description, og:image (absolute, https), og:url vs canonical, og:type, og:site_name, og:image:width/height/alt, duplicate tags
X (Twitter) Cards	twitter:card present and valid (summary_large_image), title/description/image fallbacks, 300×157 minimum, 4096×4096 maximum
Image	Loads (status, content type), real pixel size from the file header (PNG/JPEG/GIF/WebP/AVIF/SVG), 1.91:1 ratio, 1200×630 recommended, 200×200 Facebook minimum, 5 MB (X/LinkedIn) and 8 MB (Facebook) limits, WhatsApp weight (~300–600 KB), unsupported SVG/AVIF
Text	Title and description length against each platform's cut-off
oEmbed	The page's oEmbed endpoint loads and returns valid JSON (type, version)

What you get

• Dataset: one row per URL. Views: Overview (score and per-platform status), Issues and fixes, and Preview data.
• Preview mockups: one PREVIEW-… HTML page per URL, linked from the previewUrl field of its row. It shows Facebook-, LinkedIn-, X-, WhatsApp- and Slack-style cards drawn with our own templates.
• REPORT: all URLs on one page.
• REPORT_CSV: one line per issue.
• SUMMARY: compact JSON for agents.

Example issue:

{ "code": "og-image-relative", "severity": "error", "platforms": ["facebook", "linkedin", "x", "whatsapp"],
  "message": "og:image is a relative URL (/media/catalog/blue-shoe-thumb.webp); several platforms require an absolute URL.",
  "fix": "Use the full URL: https://shop.example-broken.com/media/catalog/blue-shoe-thumb.webp" }

Run with Mode = Sample to see the full output for two demo pages, free.

Monitoring

Schedule the Actor with Output = Only changed URLs. A page is then reported only when its tags or image changed since the last run, for example when a theme or SEO-plugin update removes og:image from every product page. Every page is still fetched and analysed, so each one is still charged url-checked, even when nothing changed and no row is written.

To compare runs, the Actor keeps a small record per URL (a hash of its tags and the time of the check) in the named key-value store siteverdict-social-preview-checker in your Apify account (set by State store name). It stays there until you delete it.

Optional: AI copy suggestions (your own key)

For pages scoring under 90, your Anthropic or OpenAI key generates:

• a better og:title (40–60 characters);
• an og:description (110–155 characters);
• image alt text;
• a brief for a 1200×630 image.

The suggestions use only the page's own data: its URL, title, description, site name and the problems found are sent to the AI provider you chose, under your own account with that provider. The key is a secret input (stored encrypted by Apify) and is masked in logs and output. They are AI-generated and kept in a separate aiSuggestions field; review them before you publish.

Pricing

Event	Price	When
url-checked	$0.004	Each page that returned HTML and was analysed (including unchanged pages in "Only changed URLs" mode)
ai-fix	$0.02	Each AI copy suggestion delivered (your own AI key pays the AI provider)

100 pages cost about $0.40. Fetch errors, robots.txt blocks, non-HTML responses, failed AI calls and sample mode are free. You pay only these event prices; Apify platform usage for the run is included. The run stops cleanly at your Max cost per run.

FAQ

Is this a screenshot from Facebook or X? No. We never call or scrape those platforms. The mockups come from our own templates that follow each platform's documented card layout, so real previews can differ slightly. Platforms also cache old previews. After fixing, use their own debuggers (Facebook Sharing Debugger, LinkedIn Post Inspector) to refresh the cache.

Does it run JavaScript? No. Social crawlers read the raw HTML too, so tags added only by JavaScript are invisible to them, and this Actor shows you that.

Why is my WhatsApp preview missing? Usually the image is too heavy. WhatsApp often drops thumbnails over about 600 KB, so aim for under 300 KB. This is observed behaviour, not a published limit.

Limits

• Up to 500 URLs per run. Requests to one host are sequential, at most one per second.
• Pages behind logins or bot protection fail and are not charged.
• Platform limits change. The values used are listed below and were checked on 2026-10-11.

Sources & compliance

• Data source: the public HTML, image and oEmbed responses of the URLs you submit. No social platform is contacted or scraped.
• Platform guidance (checked 2026-10-11):
  • Facebook sharing best practices, https://developers.facebook.com/docs/sharing/webmasters/images/ (1200×630, 200×200 minimum, 8 MB).
  • X Cards, https://developer.x.com/en/docs/x-for-websites/cards/overview/summary-card-with-large-image (300×157 minimum, 4096×4096, 5 MB, JPG/PNG/WEBP/GIF).
  • LinkedIn, https://www.linkedin.com/help/linkedin/answer/a521928 (1200×627).
  • The Open Graph protocol, https://ogp.me/.
  • oEmbed, https://oembed.com/.
  • The WhatsApp size guidance is observed behaviour, not a published limit.
• Polite fetching: honest User-Agent SiteVerdict/social-preview-checker (+https://apify.com/siteverdict/siteverdict-social-preview-checker). robots.txt is respected for pages, images and oEmbed endpoints. An image we may not fetch is reported as "not verified". No bot-protection bypass.
• Security: SSRF guard on every request and redirect, size caps and timeouts. The mockups HTML-escape all page content.
• Personal data (UK GDPR / EU GDPR): the Actor looks only for preview tags, images and oEmbed data. If a page you submit carries personal data in those fields (for example a person's name in a profile-page title), it is repeated in your results. You are the controller of the URLs you submit and of the results, and you should check only pages you own or have a lawful reason to check. This is not legal advice.
• Independent tool: platform names only describe compatibility. This tool is not affiliated with or endorsed by Meta, LinkedIn, X, WhatsApp or Slack.

Your data, storage and retention

• Results go only to your own Apify account: the run's dataset and key-value store (REPORT, REPORT_CSV, SUMMARY and the PREVIEW-… pages). They are kept for your Apify plan's data-retention period, unless you delete them sooner.
• The monitoring store described above keeps only a tag hash and a timestamp per URL, until you delete it.
• The Actor contacts only the URLs you submit (plus their images and oEmbed endpoints) and, if you turn AI on, your AI provider. It sends nothing to the developer, and the developer receives no copy of your input or results.