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· 5 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
0
PASS
3
INFO
0
Checks
5
3 PASS 2 FIX
D
Open Graph
Action
Open Graph tags need attention — social sharing previews may be incomplete.
FIX
Open Graph tags need attention — social sharing previews may be incomplete.
Critical::
og:image is not reachable
The og:image URL could not be fetched. Social platforms won't be able to display it.
Got: https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal
Warning::
Missing og:description
The og:description tag controls the description in social sharing previews.
Info::
og:title is short (18 characters)
Ideal length is 25–60 characters for social sharing previews.
Got: 18 chars Expected: 25–60 chars
Info::
Missing og:url
The og:url tag specifies the canonical URL for the shared content.
Info::
Missing twitter:card
Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.
URL: https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal

The og:image URL could not be fetched. Social platforms won't be able to display it.

Why this matters

An unreachable og:image URL (404, DNS fail, slow timeout) means social platforms cache the failure and serve no image for hours.

Learn more ▾

Social platforms (Facebook, Twitter) cache OG metadata aggressively — including failed image fetches. A momentarily-broken og:image can leave your shares imageless for hours. Test og:image URLs in Facebook's Sharing Debugger to force re-cache after fixing.

Source: Open Graph Protocol / Facebook Sharing Debugger

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: 18 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

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

bmbf.de

Startseite - BMFTR

No description

Preview quality · Twitter/X F · 40/100
  • twitter:card — Add <meta name="twitter:card" content="summary_large_image">
  • twitter:title — falling back from og:title
  • twitter:description — Add twitter:description to give the preview body text
  • twitter:image — falling back from og:image

  • twitter:card is missing

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

BMBF.DE

Startseite - BMFTR

No description

Preview quality · Facebook C · 70/100
  • og:title — Startseite - BMFTR
  • og:description — Add og:description to give the preview body text
  • og:image — https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal
  • og:type — website
  • og:url — Add og:url — Recommended — canonical URL for the share
  • og:site_name — Bundesministerium für Forschung, Technologie und Raumfahrt - BMFTR

Startseite - BMFTR

bmbf.de

Preview quality · LinkedIn A · 85/100
  • og:title — Startseite - BMFTR
  • og:description — Add og:description to give the preview body text
  • og:image — https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal

bmbf.de

Startseite - BMFTR

No description

Preview quality · Slack A · 85/100
  • og:title — Startseite - BMFTR
  • og:description — Add og:description to give the preview body text
  • og:image — https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal

Social preview quality

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

C · 70/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title⚠———
twitter:description———
twitter:image⚠———
D
Brand Presence
Action
Site-name consistency, favicon, social image, meta tags, schema, and contact signals
FIX

Brand Presence

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

D

47/100

Site name appears as

Page titleBMFTR
og:site_nameBundesministerium für Forschung, Technologie und Raumfahrt - BMFTR
twitter:site@bmftr_bund
Organization.name—

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

0/15

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
  • No Organization schema — Google can't render your logo in the knowledge panel
  • 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.
Info::
Custom type "PostalAddress" — unable to validate specific properties
Info::
Custom type "EntryPoint" — unable to validate specific properties
Info::
2 JSON-LD blocks found

JSON-LD Blocks

Block 1 : PostalAddress
11 properties Valid
{
  "image": "https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal",
  "description": "Bundesministerium für Forschung, Technologie und Raumfahrt - BMFTR",
  "name": "Bundesministerium für Forschung, Technologie und Raumfahrt - BMFTR",
  "address": {
    "streetAddress": "Heinemannstraße 2",
    "addressLocality": "Bonn",
    "postalCode": "53175",
    "addressCountry": "DE",
    "@context": "https://schema.org",
    "@type": "PostalAddress"
  },
  "telephone": "+49 (0)228/ 9957-0",
  "url": "https://bmftr.bund.de",
  "vatId": "DE 124 904 070",
  "email": "bmftr@bmftr.bund.de",
  "logo": "https://bmftr.bund.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal",
  "@context": "https://schema.org",
  "@type": "Organization"
}
Block 2 : EntryPoint
4 properties Valid
{
  "url": "https://bmftr.bund.de",
  "potentialAction": {
    "target": {
      "urlTemplate": "https://bmftr.bund.de/SiteGlobals/Forms/Suche/Expertensuche/Expertensuche_Formular.html?templateQueryString={search_term_string}",
      "@context": "https://schema.org",
      "@type": "EntryPoint"
    },
    "@context": "https://schema.org",
    "@type": "SearchAction",
    "query-input": "required name=search_term_string"
  },
  "@context": "https://schema.org",
  "@type": "WebSite"
}
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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