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spinellis.gr

https://spinellis.gr· First analyzed 13 May 2026· Updated 13 May 2026
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spinellis.gr
Desktop screenshot of spinellis.gr
Mobile screenshot of spinellis.gr
Mobile

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Hosting Provider

Greek Research and Technology Network (GRNET) S.A.

IP Address

83.212.173.158

Site Location

🇬🇷 Greecevia tld

Server Location

🇬🇷 Athens, Greece

ASN

AS5408

Organization

Greek Research and Technology Network (GRNET) S.A.

Server

Apache

Nameservers

dns2.papaki.gr.dns1.papaki.gr.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
516 ms10%
Speed Index
671 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.9 MB
46 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Greek Research and Technology Network (GRNET) S.A.

Technology Stack

5 Technologies Detected

CSS Frameworks

2
Bootstrapv3.3.7
Tailwind CSS

Libraries

1
jQueryv3.1.1

Icon Libraries

1
Font Awesome

Web Servers

1
Apache

SEO Analysis

D56/100
15
9
1
Meta Tags4/15
Content11/12
Headings5/8
Technical13/25
E-E-A-T3/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
S
spinellis.grspinellis.gr

Diomidis Spinellis home page

No description available for this page.

Title Length28 chars

Recommended: 50-60 chars (~163px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

10 issues found

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Crawlability

Sitemap
robots.txt

2 rules

Local SEO

Local Search Readiness

7/100
Poor
2 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F38/100
Bot Access
20/25
Machine Read.
9/25
Schema Data
0/25
Citation
9/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:16%
Words:1,327
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary71w
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
73/100
11
Passed
5
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
20/100
F
622 mg
CO₂e / view
4.9 MB
Page Weight
15%
Cleaner Than
New Visitor
711 mg
vs
Returning (cached)
356 mg
Annual (10K/mo)
74.7 kg
Emission Segments
Data Center
139 mg
Network
149 mg
Device
334 mg
Resource Breakdown
JavaScript
50.8 KB
Images
4.8 MB
CSS
44.0 KB
HTML
7.3 KB
Other
8.2 KB
Green Hosting Not Verified
Greek Research and Technology Network (GRNET) S.A.
7 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

21%Critical
Interactive

HTTPS

No WAF

44d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

28.03.2026

Valid Until

26.06.2026

Subject Alternative Names (8)

3oan.grbalab.aueb.gristlab.dmst.aueb.grspinellis.grwiki.3oan.grwww.3oan.grwww.balab.aueb.grwww.spinellis.gr

SHA-256 Fingerprint

FA:38:AD:BD:1C:D1:CA:BD:75:2B:0D:A0:C1:86:60:B3:FF:7F:27:44...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
261
content-type
text/html
date
Wed, 13 May 2026 04:39:51 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

inet.spinellis.gr

Domain Information

spinellis.gr

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
C
62/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica Neue

WCAG AA
78/100
Readability
/30
19/30

14px · LH 1.43

Hierarchy
/20
17/20

2.57x ratio · ✓ H1→H6

WCAG
/25
22/25

4.56:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Helvetica Neue

Sans36px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

4.56:1

WCAG AA (≥4.5:1)

Reading Comfort

~37 CPL

Narrow lines
36px
h1
18px
h4
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 37/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.6:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

Flesch 37

Color Palette

6 unique colors
Light
#ffffff
Background· 72.89999999999999%
#b4a6a0
Primary· 7.1%
#becdd4
Secondary· 6.6%
#4e362f
Secondary· 4.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

11 Resources

6
Scripts
5
Styles
2
Async
0
Defer

Top Script Sources

cse.google.com(2)ajax.googleapis.com(1)maxcdn.bootstrapcdn.com(1)a(1)google.com(1)

Website Identity

spinellis.gr

Location detected: 🇬🇷 Greecevia tld
en

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Last analyzed: 13 May 2026 at 04:40

Historical Analysis & Change Tracking