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· 5 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
2
PASS
1
INFO
0
Checks
5
1 PASS 2 REVIEW 2 FIX
D
Mixed Content
Action
2 HTTP resource(s) loaded on HTTPS page
FIX
2 HTTP resource(s) loaded on HTTPS page
Critical::
HTTP link loaded on HTTPS page
Modern browsers block or warn about HTTP resources on HTTPS pages. Change the URL to use HTTPS.
Got: http://www.gehirn-und-geist.de/alias/rss/gehirn-und-geist-rss-feed/982626 Expected: https://www.gehirn-und-geist.de/alias/rss/gehirn-und-geist-rss-feed/982626
Critical::
HTTP link loaded on HTTPS page
Modern browsers block or warn about HTTP resources on HTTPS pages. Change the URL to use HTTPS.
Got: http://www.sterne-und-weltraum.de/alias/rss/sterne-und-weltraum-rss-feed/865248 Expected: https://www.sterne-und-weltraum.de/alias/rss/sterne-und-weltraum-rss-feed/865248
URL: http://www.gehirn-und-geist.de/alias/rss/gehirn-und-geist-rss-feed/982626

Modern browsers block or warn about HTTP resources on HTTPS pages. Change the URL to use HTTPS.

Expected: https://www.gehirn-und-geist.de/alias/rss/gehirn-und-geist-rss-feed/982626
Why this matters

Mixed content — HTTP resource on HTTPS page. Browser may block silently or warn user.

Source: Google Chrome Security

URL: http://www.sterne-und-weltraum.de/alias/rss/sterne-und-weltraum-rss-feed/865248

Modern browsers block or warn about HTTP resources on HTTPS pages. Change the URL to use HTTPS.

Expected: https://www.sterne-und-weltraum.de/alias/rss/sterne-und-weltraum-rss-feed/865248
Why this matters

Mixed content — HTTP resource on HTTPS page. Browser may block silently or warn user.

Source: Google Chrome Security

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

54/100

Site name appears as

Page titleFilter Button
og:site_name—
twitter:site@spektrum
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

20/20

Organization schema

0/15

Contact info discoverable

0/10

no contact info discoverable

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
  • No Organization schema — Google can't render your logo in the knowledge panel
  • No discoverable contact info — trust signal is weak, legal risk is higher in regulated regions

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

B
Open Graph
Open Graph tags are partially configured — some improvements recommended.
REVIEW
Open Graph tags are partially configured — some improvements recommended.
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://static.spektrum.de/pix/sde_fallback.png
Info::
Missing og:site_name
The og:site_name tag displays the website name in social previews.
URL: https://static.spektrum.de/pix/sde_fallback.png

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: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

Preview

spektrum.de

Spektrum.de - Nachrichten aus Wissenschaft und Forschung

Experten aus Wissenschaft und Forschung berichten über die aktuellen Erkenntnisse ihrer Fachgebiete - kompetent, authentisch und verständlich.

Preview quality · Twitter/X A · 85/100
  • twitter:card — summary_large_image
  • twitter:title — falling back from og:title
  • twitter:description — falling back from og:description
  • twitter:image — falling back from og:image

SPEKTRUM.DE

Spektrum.de - Nachrichten aus Wissenschaft und Forschung

Experten aus Wissenschaft und Forschung berichten über die aktuellen Erkenntnisse ihrer Fachgebiete - kompetent, authentisch und verständlich.

Preview quality · Facebook A · 85/100
  • og:title — Spektrum.de - Nachrichten aus Wissenschaft und Forschung
  • og:description — Experten aus Wissenschaft und Forschung berichten über die aktuellen Erkenntnisse ihrer Fachgebiete - kompetent, auth...
  • og:image — https://static.spektrum.de/pix/sde_fallback.png
  • og:type — article
  • og:url — https://www.spektrum.de/
  • og:site_name — Add og:site_name — Recommended — site-level brand line in the preview

Spektrum.de - Nachrichten aus Wissenschaft und Forschung

spektrum.de

Preview quality · LinkedIn A+ · 100/100
  • og:title — Spektrum.de - Nachrichten aus Wissenschaft und Forschung
  • og:description — Experten aus Wissenschaft und Forschung berichten über die aktuellen Erkenntnisse ihrer Fachgebiete - kompetent, auth...
  • og:image — https://static.spektrum.de/pix/sde_fallback.png

spektrum.de

Spektrum.de - Nachrichten aus Wissenschaft und Forschung

Experten aus Wissenschaft und Forschung berichten über die aktuellen Erkenntnisse ihrer Fachgebiete - kompetent, authentisch und verständlich.

Preview quality · Slack A+ · 100/100
  • og:title — Spektrum.de - Nachrichten aus Wissenschaft und Forschung
  • og:description — Experten aus Wissenschaft und Forschung berichten über die aktuellen Erkenntnisse ihrer Fachgebiete - kompetent, auth...
  • og:image — https://static.spektrum.de/pix/sde_fallback.png

Social preview quality

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

A · 92/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title⚠———
twitter:description⚠———
twitter:image⚠———
A
Structured Data
1 JSON-LD block(s) found — structured data is well configured.
PASS
1 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 "description" for WebSite
Adding "description" can improve how search engines display your content.

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 "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 : WebSite
4 properties Valid
Missing required property: name
{
  "@context": "http://schema.org",
  "@type": "WebSite",
  "url": "https://www.spektrum.de/",
  "potentialAction": {
    "@type": "SearchAction",
    "target": "https://spektrum.de/suche/#/q/{search_term_string}",
    "query-input": "required name=search_term_string"
  }
}
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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