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https://Webnetz.de

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· 9 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
81
GRADE
B
FIX
3
REVIEW
2
PASS
4
INFO
0
Checks
9
4 PASS 2 REVIEW 3 FIX
F
Image Optimization
Action
7 issues found across 129 images
FIX
7 issues found across 129 images
Warning::
9 images significantly larger than display size
Resizing to display dimensions could save approximately 38 KB.
Got: ~38 KB wasted
Warning::
31 images missing explicit width/height
Images without dimensions cause layout shifts (CLS). Set explicit width and height attributes.
Info::
106 below-fold images missing loading="lazy"
Lazy loading defers below-fold images, reducing initial page weight.
Info::
112 of 129 images use legacy formats
Warning::
16 images missing alt text
Alt text is essential for screen readers and SEO. Every meaningful image needs descriptive alt text.
Info::
8 image(s) wider than 400px without srcset (no responsive serving)
These images deliver the same asset to every viewport (mobile, tablet, retina). Adding srcset / <picture> lets the browser pick a viewport-appropriate variant and typically saves 40-70% of bytes on mobile. Sample: https://www.webnetz.de/img/asset/aW1hZ2VzL2Jsb2dncmFmaWtlbi9jaGF0Z3B0LWltYWdlLTUuLW1haS0yMDI2Xy0xMl80NF80Ny5wbmc/chatgpt-image-5.-mai-2026_-12_44_47.png?p=placeholder&s=bb422822610dc1fa184309effeadcdc8, https://www.webnetz.de/img/asset/aW1hZ2VzL2Jsb2dncmFmaWtlbi9pbWFnZS5wbmc/image.png?p=placeholder&s=3426989bdbd7eba699e211a23bdb144f, https://www.webnetz.de/img/asset/aW1hZ2VzL2Jsb2dncmFmaWtlbi9oZWFkZXItYmllci5qcGc/header-bier.jpg?p=placeholder&s=abf041f4c1442b222d57fcc3b34e2517 (+5 more).
Info::
10 image(s) rendered at a different aspect ratio than the source
The displayed dimensions distort the source -- CSS is forcing the image into a container at the wrong ratio, producing visible stretching or squashing. Either crop the source to match or use object-fit: cover (and accept the crop). Sample: https://www.webnetz.de/img/asset/aW1hZ2VzL3JlZmVyZW56ZW4vZHVyc3Rsb2VzY2hlcl90ZWFzZXIuanBn/durstloescher_teaser.jpg?p=placeholder&s=21d682d3ddf94150f02bda5d0c84311d, https://www.webnetz.de/img/asset/aW1hZ2VzL3JlZmVyZW56ZW4vdmZiX3N0dXR0Z2FydF8xODkzX2xvZ28uc3ZnLnBuZw/vfb_stuttgart_1893_logo.svg.png?p=placeholder&s=944bc1fe8a3486873cdeb64d39a7148e, https://www.webnetz.de/images/referenzen/gesundheitsholding.svg (+7 more).
F
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.

F

39/100

Site name appears as

Page titlewebnetz.de
og:site_namewebnetz.de
twitter:site—
Organization.nameweb-netz GmbH

Inconsistent — names differ across channels

Brand assets

Favicon

0/15

Social share image

0/20

Meta completeness

14/20

Organization schema

15/15

has name, logo + url

Contact info discoverable

5/10

mailto link + tel link

Findings

  • Brand name differs across channels — users see inconsistent identity
  • No social share image — shared links render as bare URLs
  • No favicon link tags detected — browsers fall back to the generic globe
  • og:image missing
  • 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.

B
Open Graph
Open Graph tags are partially configured — some improvements recommended.
REVIEW
Open Graph tags are partially configured — some improvements recommended.
Warning::
Missing og:image
The og:image tag provides a preview image for social sharing.

The og:image tag provides a preview image for social sharing.

Why this matters

No og:image means social shares are imageless — measurably less engaging than image-cards across every major platform.

Learn more ▾

Twitter, Facebook, and LinkedIn all use og:image (or twitter:image as a fallback) for share-card thumbnails. Without one, the post renders as a text-only card. A 1200x630px image (Twitter's preferred size) covers all platforms.

Source: Open Graph Protocol

Preview

No image set

Webnetz.de

Die Online-Agentur aus Lüneburg ⭐

web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns auf Sie!

Preview quality · Twitter/X C · 65/100
  • twitter:card — summary_large_image
  • twitter:title — Die Online-Agentur aus Lüneburg ⭐
  • twitter:description — web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns ...
  • twitter:image — Add twitter:image — preview card without an image looks broken

  • No preview image for Twitter/X

    → Add og:image or twitter:image (≥300×157 for summary_large_image)

No image set

WEBNETZ.DE

Die Online-Agentur aus Lüneburg ⭐

web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns auf Sie!

Preview quality · Facebook C · 65/100
  • og:title — Die Online-Agentur aus Lüneburg ⭐
  • og:description — web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns ...
  • og:image — Add og:image — preview card without an image looks broken
  • og:type — website
  • og:url — https://www.webnetz.de
  • og:site_name — webnetz.de

  • No preview image for Facebook

    → Add og:image (recommended 1200×630)

No image set

Die Online-Agentur aus Lüneburg ⭐

Webnetz.de

Preview quality · LinkedIn C · 65/100
  • og:title — Die Online-Agentur aus Lüneburg ⭐
  • og:description — web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns ...
  • og:image — Add og:image — preview card without an image looks broken

  • No preview image for LinkedIn

    → Add og:image (recommended 1200×627)

Webnetz.de

Die Online-Agentur aus Lüneburg ⭐

web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns auf Sie!

Preview quality · Slack B · 80/100
  • og:title — Die Online-Agentur aus Lüneburg ⭐
  • og:description — web-netz GmbH | Online-Agentur aus Lüneburg! 360° Online-Marketing ✔️ Webentwicklung ✔️ Consulting ✔️ Wir freuen uns ...
  • og:image — Add og:image — preview card without an image looks broken

  • No preview image — Slack unfurl will be text-only

    → Add og:image or twitter:image

Social preview quality

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

C · 68/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title———
twitter:description———
twitter:image———
B
Autoplay Media
1 autoplay media element(s) -- all muted
REVIEW
1 autoplay media element(s) -- all muted
Info::
1 autoplay media element(s) on page (muted)
Autoplay video transfers bytes whether the user engages or not -- a sustainability concern even when muted. Consider replacing with a static poster image and a click-to-play overlay; the user opts in to the bandwidth cost.
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+
Open Graph / Twitter Card Depth
OG image dimensions and Twitter card configuration look healthy
PASS
OG image dimensions and Twitter card configuration look healthy
Info::
OG/Twitter Card depth is clean -- dimensions, card type, and inheritance all valid
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.

JSON-LD Blocks

Block 1 : Organization
8 properties Valid
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "web-netz GmbH",
  "alternateName": "webnetz",
  "url": "https://www.webnetz.de",
  "logo": "https://www.webnetz.de/images/pressefotos/logo_webnetz.png",
  "contactPoint": {
    "@type": "ContactPoint",
    "telephone": "+49 4131 214300 - 0",
    "contactType": "technical support",
    "contactOption": "TollFree",
    "areaServed": "DE",
    "availableLanguage": "German"
  },
  "sameAs": [
    "https://www.linkedin.com/company/web-netz-gmbh/posts/?feedView=all",
    "https://www.instagram.com/webnetz/",
    "https://www.tiktok.com/@webnetz",
    "https://www.facebook.com/webnetz"
  ]
}
A+
Rich Results Eligibility
1 JSON-LD block(s) declaring 1 schema type(s)
PASS
1 JSON-LD block(s) declaring 1 schema type(s)
Info::
1 rich-result schema type(s) declared
Inventory of structured-data types on the page (each may unlock a different SERP feature): Organization Search engines decide whether to render rich results based on content quality + page-level signals; declaring the schema is necessary but not sufficient.
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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