Content

· 5 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

1 PASS 2 REVIEW 2 FIX

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.

Missing og:description

The og:description tag controls the description in social sharing previews.

Missing og:image

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

og:title is short (6 characters)

Ideal length is 25–60 characters for social sharing previews.

Got: 6 chars Expected: 25–60 chars

Missing og:url

The og:url tag specifies the canonical URL for the shared content.

Missing og:type

The og:type tag helps social platforms categorize the content.

Missing twitter:card

Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

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: 6 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

The og:type tag helps social platforms categorize the content.

Why this matters

Default og:type is 'website' but the right value (article, product, profile) unlocks richer metadata fields and higher engagement.

Learn more ▾

og:type controls which other og: fields a platform respects. og:type=article enables og:article:published_time, author, and section — surfaced in news cards. og:type=product enables price/availability fields surfaced by Pinterest and shopping integrations. Default 'website' silently disables those.

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

No image set

uoa.gr

Αρχική

No description

Preview quality · Twitter/X F · 10/100

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 — Add twitter:image — preview card without an image looks broken

twitter:card is missing
→ Add <meta name="twitter:card" content="summary_large_image">
No preview image for Twitter/X
→ Add og:image or twitter:image (≥300×157 for summary_large_image)

No image set

UOA.GR

Αρχική

No description

Preview quality · Facebook F · 20/100

og:title — Αρχική
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 — Add og:type — Recommended — tells Facebook the content category
og:url — Add og:url — Recommended — canonical URL for the share
og:site_name — Εθνικόν και Καποδιστριακόν Πανεπιστήμιον Αθηνών

No preview image for Facebook
→ Add og:image (recommended 1200×630)

No image set

Αρχική

uoa.gr

Preview quality · LinkedIn D · 50/100

og:title — Αρχική
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)

uoa.gr

Αρχική

No description

Preview quality · Slack C · 65/100

og:title — Αρχική
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 · 36/100

Field	Twitter/X	Facebook	LinkedIn	Slack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card		—	—	—
twitter:title	⚠	—	—	—
twitter:description		—	—	—
twitter:image		—	—	—

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.

26/100

Site name appears as

Page title	Εθνικόν και Καποδιστριακόν Πανεπιστήμιον Αθηνών
og:site_name	Εθνικόν και Καποδιστριακόν Πανεπιστήμιον Αθηνών
twitter:site	—
Organization.name	—

Consistent

Brand assets

Favicon

8/15

single size only

Social share image

0/20

Meta completeness

8/20

Organization schema

0/15

Contact info discoverable

0/10

no contact info discoverable

Findings

Missing brand name in: twitter:site, Organization.name
No social share image — shared links render as bare URLs
Single favicon only — add apple-touch-icon for iOS home-screen and high-DPI support
og:image missing
twitter:card missing
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.

Links

183 links checked, 180 healthy, 3 broken

REVIEW

183 links checked, 180 healthy, 3 broken

180 of 183 links are healthy

Broken link: http://www.synodos-aei.gr/announcements.html

Found in <a href>. Returns HTTP 404.

Got: HTTP 404

Broken link: http://www.cce.uoa.gr

Found in <a href>. Get "http://www.cce.uoa.gr": context deadline exceeded

Got: unreachable

Broken link: http://my-studies.uoa.gr

Found in <a href>. Get "http://my-studies.uoa.gr": context deadline exceeded

Got: unreachable

183 total 179 healthy 3 broken 1 redirects

Broken Links (3)

Status	URL	Found in	Error
404	http://www.synodos-aei.gr/announcements.html	`<a>`	Not Found
ERR	http://www.cce.uoa.gr	`<a>`	Get "http://www.cce.uoa.gr": context dea...
ERR	http://my-studies.uoa.gr	`<a>`	Get "http://my-studies.uoa.gr": context ...

Redirects (1)

URL	Destination	Found in	Hops
https://uniflix.uoa.gr/	https://uniflix.uoa.gr/	`<a>`	0

200 https://uoa.gr/typo3conf/ext/uoa_website/Resources/Public/Im... <link>

200 https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css <link>

200 https://uoa.gr/typo3conf/ext/uoa_website/Resources/Public/Cs... <link>

200 https://uoa.gr/typo3temp/assets/css/7015c8c4ac5ff815b57530b2... <link>

200 https://fonts.googleapis.com/css?family=GFS+Didot&subset=gre... <link>

200 https://fonts.googleapis.com/css?family=Roboto:300,400,500,7... <link>

200 https://fonts.googleapis.com/css?family=Open+Sans:400,600,70... <link>

200 https://uoa.gr/typo3conf/ext/uoa_website/Resources/Public/Cs... <link>

200 https://uoa.gr/typo3conf/ext/uoa_website/Resources/Public/Fo... <link>

200 https://uoa.gr/typo3conf/ext/uoa_website/Resources/Public/Cs... <link>

200 https://uoa.gr/typo3conf/ext/we_cookie_consent/Resources/Pub... <link>

200 https://uoa.gr/typo3conf/ext/ke_search/Resources/Public/Css/... <link>

200 https://uoa.gr/?type=9821 <link>

200 https://www.googletagmanager.com/gtag/js?id=G-2T5JM61G8W <script>

200 https://uoa.gr/prosopiko <a>

200 https://uoa.gr/foitites <a>

200 https://en.uoa.gr/ <a>

200 https://uoa.gr/epikoinonia_kai_prosbasi <a>

200 https://www.facebook.com/uoa.official <a>

200 https://www.youtube.com/channel/UCz9D6aUKkfItjR6cPrn1OVw <a>

200 https://twitter.com/uoaofficial <a>

200 https://www.linkedin.com/school/15094179/ <a>

200 https://www.instagram.com/nkua.gr/ <a>

200 https://invite.viber.com/?g2=AQAGhtIgsKpqZFDapSA2UcnmO38vY6L... <a>

200 https://uoa.gr/ <a>

200 https://uoa.gr/fileadmin/user_upload/uoa_logo_gr.svg <img>

200 https://uoa.gr/to_panepistimio <a>

200 https://uoa.gr/to_panepistimio/chairetismos_toy_prytani <a>

200 https://uoa.gr/to_panepistimio/istoria_kai_prooptikes <a>

200 https://cy.uoa.gr/ <a>

200 https://uoa.gr/to_panepistimio/apostoli_politikes_kai_dimosi... <a>

200 https://uoa.gr/to_panepistimio/stratigiko_schedio_anaptyxis_... <a>

200 https://uoa.gr/to_panepistimio/organa_dioikisis <a>

200 https://uoa.gr/to_panepistimio/anthropino_dynamiko <a>

200 https://uoa.gr/to_panepistimio/diethneis_scheseis <a>

200 https://uoa.gr/to_panepistimio/efimerida <a>

200 https://uoa.gr/to_panepistimio/civis_eyropaiko_panepistimio_... <a>

200 https://uoa.gr/to_panepistimio/dioikitikes_ypiresies <a>

200 https://uoa.gr/to_panepistimio/moyseia <a>

Structured Data

Action

No structured data (JSON-LD) found.

REVIEW

No structured data (JSON-LD) found.

No structured data (JSON-LD) found

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

A+

Mixed Content

No mixed content detected — all resources use HTTPS.

PASS

No mixed content detected — all resources use HTTPS.

No mixed content detected — all resources use HTTPS

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.