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https://Diehl.com

Content

· 9 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
91
GRADE
A
FIX
1
REVIEW
2
PASS
6
INFO
0
Checks
9
6 PASS 2 REVIEW 1 FIX
F
Image Optimization
Action
6 issues found across 13 images
FIX
6 issues found across 13 images
Warning::
4 images significantly larger than display size
Resizing to display dimensions could save approximately 5 KB.
Got: ~5 KB wasted
Warning::
13 images missing explicit width/height
Images without dimensions cause layout shifts (CLS). Set explicit width and height attributes.
Info::
12 below-fold images missing loading="lazy"
Lazy loading defers below-fold images, reducing initial page weight.
Warning::
All 9 images use legacy formats (JPEG/PNG/GIF)
WebP offers 25-35% smaller files than JPEG. Use <picture> with <source type="image/webp"> for modern format support.
Info::
5 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://new.diehl.com/var/site/storage/images/_aliases/200px/2/6/1/2/22162-1-ger-DE/4c46a21553b7-AdobeStock_1079762019.jpeg, https://new.diehl.com/var/site/storage/images/_aliases/400px/9/0/7/9/449709-1-ger-DE/51880fc09f27-pm_ziesel_v.jpg, https://new.diehl.com/var/site/storage/images/_aliases/400px/3/7/6/8/448673-1-ger-DE/1b09a1462963-2026_05_08_pm_mou_hds_verteilerbild.jpg (+2 more).
Info::
7 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://new.diehl.com/group/en/asset/download/898/file/Icon_Beschaeftigte, https://new.diehl.com/group/en/asset/download/899/file/Umsatz, https://new.diehl.com/group/en/asset/download/897/file/FundE (+4 more).
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.
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

65/100

Site name appears as

Page titleicon_
og:site_nameDiehl Group
twitter:site—
Organization.nameDiehl Group

Inconsistent — names differ across channels

Brand assets

Favicon

12/15

covers apple-touch-icon

Social share image

20/20

og:image + twitter:image set

Meta completeness

20/20

Organization schema

8/15

has name + url

Contact info discoverable

0/10

no contact info discoverable

Findings

  • Brand name differs across channels — users see inconsistent identity
  • Add an apple-touch-icon and at least two PNG sizes (32x32 + 192x192)
  • Organization schema missing logo — add a logo property pointing to a square PNG
  • Consider adding contactPoint — helps appear in "contact us" rich results
  • 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.

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
Open Graph tags are well configured for social sharing.
PASS
Open Graph tags are well configured for social sharing.
Info::
og:title is short (22 characters)
Ideal length is 25–60 characters for social sharing previews.
Got: 22 chars Expected: 25–60 chars
Info::
og:description is long (331 characters)
Descriptions over 200 characters may be truncated in social sharing previews.
Got: 331 chars Expected: 55–200 chars
URL: 22 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

URL: 331 chars

Descriptions over 200 characters may be truncated in social sharing previews.

Expected: 55–200 chars
Why this matters

og:description borderline-too-long — social platforms truncate around ~200 chars.

Source: Open Graph Protocol

Preview

Diehl.com

Tradition goes Future!

Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly diversified product range comprises various business fields in different industrial sectors. With approx. 18,700 employees worldwide, the long-established Diehl company generates annual sales of 4.7 billion euros.

Preview quality · Twitter/X A+ · 95/100

Description will be truncated (332 chars / 200 max)

  • twitter:card — summary_large_image
  • twitter:title — Tradition goes Future!
  • twitter:description — Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly...
  • twitter:image — https://new.diehl.com/var/site/storage/images/1/9/0/8/58091-1-eng-US/e3a1b29c2598-vorschaubild_links.png

  • Description will be truncated on Twitter/X (332 chars, max 200)

    → Tighten the description to ≤200 characters

DIEHL.COM

Tradition goes Future!

Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly diversified product range comprises various business fields in different industrial sectors. With approx. 18,700 employees worldwide, the long-established Diehl company generates annual sales of 4.7 billion euros.

Preview quality · Facebook A+ · 95/100

Description will be truncated (332 chars / 155 max)

  • og:title — Tradition goes Future!
  • og:description — Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly...
  • og:image — https://new.diehl.com/var/site/storage/images/1/9/0/8/58091-1-eng-US/e3a1b29c2598-vorschaubild_links.png
  • og:type — article
  • og:url — https://new.diehl.com/group/en/
  • og:site_name — Diehl Group

  • Description will be truncated on Facebook (332 chars, max 155)

    → Tighten og:description to ≤155 characters

Tradition goes Future!

Diehl.com

Preview quality · LinkedIn A+ · 95/100

Description will be truncated (332 chars / 150 max)

  • og:title — Tradition goes Future!
  • og:description — Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly...
  • og:image — https://new.diehl.com/var/site/storage/images/1/9/0/8/58091-1-eng-US/e3a1b29c2598-vorschaubild_links.png

  • Description will be truncated on LinkedIn (332 chars, max 150)

    → Tighten og:description to ≤150 characters

Diehl.com

Tradition goes Future!

Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly diversified product range comprises various business fields in different industrial sectors. With approx. 18,700 employees worldwide, the long-established Diehl company generates annual sales of 4.7 billion euros.

Preview quality · Slack A+ · 100/100

Description will be truncated (332 chars / 300 max)

  • og:title — Tradition goes Future!
  • og:description — Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly...
  • og:image — https://new.diehl.com/var/site/storage/images/1/9/0/8/58091-1-eng-US/e3a1b29c2598-vorschaubild_links.png

  • Long description may be shortened by Slack (332 chars, guideline ~300)

    → Consider tightening to ~300 chars for the cleanest unfurl

Social preview quality

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

A+ · 96/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title———
twitter:description———
twitter:image———
A+
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
2 JSON-LD block(s) found — structured data is well configured.
PASS
2 JSON-LD block(s) found — structured data is well configured.
Info::
Missing recommended property "logo" for Organization
Adding "logo" can improve how search engines display your content.
Info::
Custom type "WebPage" — unable to validate specific properties
Info::
2 JSON-LD blocks found

Adding "logo" 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
7 properties Valid
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "Diehl Group",
  "url": "https://new.diehl.com/group/en",
  "brand": "Diehl Group",
  "sameAs": [
    "https://de.linkedin.com/company/diehl-group",
    "https://www.youtube.com/@diehl"
  ],
  "numberOfEmployees": {
    "@type": "QuantitativeValue",
    "value": 3055
  }
}
Block 2 : WebPage
9 properties Valid
{
  "@context": "https://schema.org",
  "@type": "WebPage",
  "@id": "https://new.diehl.com/group/en/",
  "url": "https://new.diehl.com/group/en/",
  "name": "Diehl Group",
  "isPartOf": {
    "@type": "WebSite",
    "name": "Diehl Group",
    "url": "https://new.diehl.com"
  },
  "inLanguage": "en",
  "dateModified": "2026-04-01T07:50:21+00:00",
  "description": "Diehl Stiftung GmbH & Co. KG is a globally active German technology enterprise headquartered in Nürnberg. Our broadly diversified product range comprises various business fields in different industrial sectors. With approx. 18,700 employees worldwide, the long-established Diehl company generates annual sales of 4.7 billion euros."
}
A+
Rich Results Eligibility
2 JSON-LD block(s) declaring 2 schema type(s)
PASS
2 JSON-LD block(s) declaring 2 schema type(s)
Info::
2 rich-result schema type(s) declared
Inventory of structured-data types on the page (each may unlock a different SERP feature): Organization, WebPage 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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