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· 5 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
2
PASS
3
INFO
0
Checks
5
3 PASS 2 REVIEW
C
Open Graph
Action
Open Graph tags are partially configured — some improvements recommended.
REVIEW
Open Graph tags are partially configured — some improvements recommended.
Warning::
Missing og:description
The og:description tag controls the description in social sharing previews.
Info::
og:title is short (10 characters)
Ideal length is 25–60 characters for social sharing previews.
Got: 10 chars Expected: 25–60 chars
Info::
Missing og:url
The og:url tag specifies the canonical URL for the shared content.
Info::
Missing og:site_name
The og:site_name tag displays the website name in social previews.
Info::
Missing twitter:card
Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

The og:description tag controls the description in social sharing previews.

Why this matters

No og:description means social cards either show no subtitle or scrape the first paragraph — usually unflattering.

Learn more ▾

Without og:description, social platforms either render no subtitle or pull whatever text appears first on the page. The first paragraph is rarely written for share-card context. A purpose-written 150-200 character og:description gives a polished card.

Source: Open Graph Protocol

URL: 10 chars

Ideal length is 25–60 characters for social sharing previews.

Expected: 25–60 chars
Why this matters

og:title very short — may render with awkward whitespace in social cards.

Source: Open Graph Protocol

The og:url tag specifies the canonical URL for the shared content.

Why this matters

Without og:url, social platforms infer the canonical URL — often picking a tracking-param variant that pollutes share counts.

Learn more ▾

og:url tells the social platform which URL to count this share against. Without it, platforms use the literal URL the user pasted (which may include utm_* parameters, ref codes, etc.). Setting og:url to the canonical form keeps share-count attribution clean.

Source: Open Graph Protocol

The og:site_name tag displays the website name in social previews.

Why this matters

Without og:site_name, social cards omit the brand attribution — users see the post but not who published it.

Learn more ▾

og:site_name appears in the social card chrome (above the title in Facebook/LinkedIn previews). Without it, posts read as anonymous URLs. Set it to your brand name to get free attribution on every share.

Source: Open Graph Protocol

Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

Why this matters

Without twitter:card, Twitter renders posts as plain text — no preview image, no structured layout.

Learn more ▾

Twitter requires `<meta name="twitter:card" content="summary_large_image">` (or summary) to render share-cards at all. Without it, links appear as raw text and engagement plummets vs cards. Twitter also falls back to og:image if twitter:image isn't set, so configure both.

Source: Twitter Developer Platform

Preview

rki.de

Startseite

No description

Preview quality · Twitter/X D · 50/100
  • twitter:card — Add <meta name="twitter:card" content="summary_large_image">
  • twitter:title — falling back from og:title
  • twitter:description — falling back from <meta name=description>
  • twitter:image — falling back from og:image

  • twitter:card is missing

    → Add <meta name="twitter:card" content="summary_large_image">

RKI.DE

Startseite

No description

Preview quality · Facebook C · 65/100
  • og:title — Startseite
  • og:description — falling back from <meta name=description>
  • og:image — https://www.rki.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal&v=2
  • og:type — website
  • og:url — Add og:url — Recommended — canonical URL for the share
  • og:site_name — Add og:site_name — Recommended — site-level brand line in the preview

Startseite

rki.de

Preview quality · LinkedIn A+ · 95/100
  • og:title — Startseite
  • og:description — falling back from <meta name=description>
  • og:image — https://www.rki.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal&v=2

rki.de

Startseite

No description

Preview quality · Slack A+ · 95/100
  • og:title — Startseite
  • og:description — falling back from <meta name=description>
  • og:image — https://www.rki.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal&v=2

Social preview quality

Averaged across Twitter/X, Facebook, LinkedIn, and Slack.

B · 76/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description⚠⚠⚠
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title⚠———
twitter:description⚠———
twitter:image⚠———
C
Brand Presence
Action
Site-name consistency, favicon, social image, meta tags, schema, and contact signals
REVIEW

Brand Presence

Your brand name differs across channels — visitors see inconsistent identity.

C

62/100

Site name appears as

Page titleStartseite
og:site_name—
twitter:site—
Organization.nameRobert Koch-Institut

Inconsistent — names differ across channels

Brand assets

Favicon

15/15

covers multiple sizes + apple-touch-icon

Social share image

14/20

og:image set; twitter:image missing

Meta completeness

8/20

Organization schema

15/15

has name, logo + url

Contact info discoverable

5/10

mailto link

Findings

  • Brand name differs across channels — users see inconsistent identity
  • Add twitter:image — Twitter falls back to og:image only when it's larger than 300×157
  • twitter:card missing
  • Consider adding contactPoint — helps appear in "contact us" rich results
  • Only partial contact info discoverable — consider adding a dedicated contact page or mailto/tel link

How consistently your brand appears across channels — shared link previews, structured data, favicon, contact info.

A+
Mixed Content
No mixed content detected — all resources use HTTPS.
PASS
No mixed content detected — all resources use HTTPS.
Info::
No mixed content detected — all resources use HTTPS
A
Structured Data
2 JSON-LD block(s) found — structured data is well configured.
PASS
2 JSON-LD block(s) found — structured data is well configured.
Warning::
Missing required property "name" for WebSite
The "name" property is required for the WebSite schema type.
Info::
Missing recommended property "sameAs" for Organization
Adding "sameAs" can improve how search engines display your content.
Info::
Missing recommended property "description" for WebSite
Adding "description" can improve how search engines display your content.
Info::
2 JSON-LD blocks found

The "name" property is required for the WebSite schema type.

Why this matters

Schema markup missing required properties is silently rejected by Google — your structured data appears in source but never as a rich result.

Learn more ▾

Each schema.org type has required properties (Article needs headline + author + datePublished; Product needs name + offers; etc.). Missing them means Google's rich-result eligibility check fails. The Search Console Rich Results Test surfaces specific gaps. Fix the missing property; rich results re-appear within hours.

Source: Google Search Central / schema.org

Adding "sameAs" can improve how search engines display your content.

Why this matters

Recommended schema properties unlock richer SERP layouts — without them you get the basic rich result instead of the enhanced one.

Learn more ▾

Recommended properties expand what Google can render. E.g., adding aggregateRating to Product unlocks star ratings; adding image to Article unlocks the image-card variant. Each recommended property is a direct SERP-real-estate gain.

Source: Google Search Central / schema.org

Adding "description" can improve how search engines display your content.

Why this matters

Recommended schema properties unlock richer SERP layouts — without them you get the basic rich result instead of the enhanced one.

Learn more ▾

Recommended properties expand what Google can render. E.g., adding aggregateRating to Product unlocks star ratings; adding image to Article unlocks the image-card variant. Each recommended property is a direct SERP-real-estate gain.

Source: Google Search Central / schema.org

JSON-LD Blocks

Block 1 : Organization
11 properties Valid
{
  "@type": "Organization",
  "image": "https://www.rki.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal",
  "description": "Weitere Informationen zum RKI",
  "name": "Robert Koch-Institut",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "Nordufer 20",
    "addressLocality": "Berlin",
    "postalCode": "13353",
    "addressCountry": "DE",
    "@context": "https://schema.org"
  },
  "telephone": "+49 30 18754 0",
  "url": "https://www.rki.de",
  "vatId": "DE 165 893 430",
  "email": "webmaster@rki.de",
  "logo": "https://www.rki.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal",
  "@context": "https://schema.org"
}
Block 2 : WebSite
4 properties Valid
Missing required property: name
{
  "@type": "WebSite",
  "url": "https://www.rki.de",
  "potentialAction": {
    "@type": "SearchAction",
    "target": {
      "@type": "EntryPoint",
      "urlTemplate": "https://www.rki.de/SiteGlobals/Forms/Suche/Expertensuche/Expertensuche_Formular.html?templateQueryString={search_term_string}",
      "@context": "https://schema.org"
    },
    "query-input": "required name=search_term_string",
    "@context": "https://schema.org"
  },
  "@context": "https://schema.org"
}
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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