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· 9 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
68
GRADE
D
FIX
4
REVIEW
2
PASS
3
INFO
0
Checks
9
3 PASS 2 REVIEW 4 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.
Warning::
Missing og:description
The og:description tag controls the description in social sharing previews.
Warning::
Missing og:image
The og:image tag provides a preview image for social sharing.
Info::
og:title is short (11 characters)
Ideal length is 25–60 characters for social sharing previews.
Got: 11 chars Expected: 25–60 chars
Info::
Missing og:site_name
The og:site_name tag displays the website name in social previews.

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

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

URL: 11 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: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

No image set

nabytkar.com

NABYTKAR.CZ

No description

Preview quality · Twitter/X F · 45/100
  • twitter:card — summary_large_image
  • twitter:title — falling back from og:title
  • twitter:description — Add twitter:description to give the preview body text
  • 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

NABYTKAR.COM

NABYTKAR.CZ

No description

Preview quality · Facebook F · 35/100
  • og:title — NABYTKAR.CZ
  • og:description — Add og:description to give the preview body text
  • og:image — Add og:image — preview card without an image looks broken
  • og:type — website
  • og:url — https://nabytkar.com/
  • og:site_name — Add og:site_name — Recommended — site-level brand line in the preview

  • No preview image for Facebook

    → Add og:image (recommended 1200×630)

No image set

NABYTKAR.CZ

nabytkar.com

Preview quality · LinkedIn D · 50/100
  • og:title — NABYTKAR.CZ
  • og:description — Add og:description to give the preview body text
  • og:image — Add og:image — preview card without an image looks broken

  • No preview image for LinkedIn

    → Add og:image (recommended 1200×627)

nabytkar.com

NABYTKAR.CZ

No description

Preview quality · Slack C · 65/100
  • og:title — NABYTKAR.CZ
  • og:description — Add og:description to give the preview body text
  • 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.

F · 48/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title⚠———
twitter:description———
twitter:image———
F
Image Optimization
Action
6 issues found across 55 images
FIX
6 issues found across 55 images
Warning::
12 images significantly larger than display size
Resizing to display dimensions could save approximately 128 KB.
Got: ~128 KB wasted
Warning::
55 images missing explicit width/height
Images without dimensions cause layout shifts (CLS). Set explicit width and height attributes.
Info::
50 below-fold images missing loading="lazy"
Lazy loading defers below-fold images, reducing initial page weight.
Warning::
All 19 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.
Warning::
4 images missing alt text
Alt text is essential for screen readers and SEO. Every meaningful image needs descriptive alt text.
Info::
1 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://novy.nabytkar.sk/imgserver/eshop/nabytkar/783/2000000325/4312147165334-banner_spodny2_cz.jpg?w=1400.
F
Brand Presence
Action
Site-name consistency, favicon, social image, meta tags, schema, and contact signals
FIX

Brand Presence

Partial brand coverage — a few channels are missing brand signals.

F

33/100

Site name appears as

Page titlesocial-youtube
og:site_name—
twitter:site—
Organization.name—

Consistent

Brand assets

Favicon

15/15

covers multiple sizes + apple-touch-icon

Social share image

0/20

Meta completeness

8/20

Organization schema

0/15

Contact info discoverable

5/10

mailto link + tel link

Findings

  • Missing brand name in: og:site_name, twitter:site, Organization.name
  • No social share image — shared links render as bare URLs
  • og:image 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.

C
Structured Data
Action
No structured data (JSON-LD) found.
REVIEW
No structured data (JSON-LD) found.
Info::
No structured data (JSON-LD) found
Adding structured data helps search engines understand your content and can enable rich results.

Adding structured data helps search engines understand your content and can enable rich results.

Why this matters

Without schema.org markup, your pages can't appear as rich results (stars, FAQs, recipes) in search.

Learn more ▾

Structured data is what unlocks rich snippets — review stars, FAQ accordions, recipe cards, breadcrumbs, etc. — that take up more SERP space and dramatically improve click-through. The schema.org vocabulary is well-documented and JSON-LD is the easiest format.

Source: Google Search Central / schema.org

No structured data found

Structured data (JSON-LD) helps search engines understand your content better. Adding it can improve your search result appearance.

Common types include:

  • WebSite — your site identity and search box
  • Organization — your company information
  • Article — blog posts and news articles
  • Product — e-commerce product pages
  • BreadcrumbList — navigation paths
Learn more at schema.org
C
Rich Results Eligibility
Action
No JSON-LD found -- no rich-result eligibility
REVIEW
No JSON-LD found -- no rich-result eligibility
Info::
No JSON-LD structured data on the page
No `<script type="application/ld+json">` blocks found. Without structured data, search engines fall back to inferring page meaning from raw HTML -- which works but doesn't unlock SERP features (rich snippets, knowledge panel, FAQ accordion, breadcrumb trail). Adding even basic JSON-LD (Organization for the site identity, BreadcrumbList for navigation context) is a low-effort SEO win.
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+
Autoplay Media
No autoplay media on the page
PASS
No autoplay media on the page
Info::
No autoplay media on the page
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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