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stuk.fi

https://stuk.fi· First analyzed 13 May 2026· Updated 13 May 2026
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stuk.fi
Desktop screenshot of stuk.fi
Mobile screenshot of stuk.fi
Mobile

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Hosting Provider

AMB-HOSTING

IP Address

185.192.15.163

Site Location

🇫🇮 Finlandvia tld

Server Location

🇫🇮 Hämeenlinna, Finland

ASN

AS209299

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns2-usa.global.sonera.net.ns2-fin.global.sonera.fi.ns1-fin.global.sonera.fi.ns1-swe.global.sonera.se.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
837 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.4 MB
250 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
AMB-HOSTING
CDN
Cloudflare

Technology Stack

7 Technologies Detected

Frameworks

1
Reactv16.12.0

Libraries

1
jQuery

UI Components

1
Owl Carousel

Other

1
lazysizes

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

CDN

1
Cloudflare

SEO Analysis

C67/100
20
5
2
Meta Tags7/15
Content11/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
S
stuk.fistuk.fi

Etusivu | Säteilyturvakeskus STUK

No description available for this page.

Title Length33 chars

Recommended: 50-60 chars (~195px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (7/10) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

899 URLs

899 sub-sitemaps

robots.txt

13 rules

Sitemap reference found

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

D43/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
13/25

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
nav
Text ratio:7%
Words:2,200
Token eff.:Optimal
Depth:1/5

Structured Data

Microdata

Citation Readiness

Opening Summary28w
Descriptive Headingsavg 4w
Canonical URL
Open Graph2/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
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.
A
87/100
15
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
28/100
F
553 mg
CO₂e / view
4.4 MB
Page Weight
15%
Cleaner Than
New Visitor
632 mg
vs
Returning (cached)
316 mg
Annual (10K/mo)
66.4 kg
Emission Segments
Data Center
124 mg
Network
133 mg
Device
297 mg
Resource Breakdown
JavaScript
717.4 KB
Images
3.2 MB
CSS
329.4 KB
HTML
41.5 KB
Other
100.9 KB
Green Hosting Not Verified
AMB-HOSTING
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

61%Fair
Interactive

HTTPS

WAF

142d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Entrust Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

18.03.2026

Valid Until

02.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

stuk.fiwww.stuk.fi

SHA-256 Fingerprint

B2:E6:38:2D:2C:15:6D:7A:31:3E:47:75:37:2B:8B:38:AF:6A:B3:D8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age
135
cache-control
🟡 180s(max-age=180, public)
cf-cache-status
HIT
cf-ray🇫🇷 Paris
9fb5971cabb46984-CDG
content-encoding
📦 Gzip(gzip)
content-type
text/html;charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mail.valtori.fi

Domain Information

stuk.fi

Domain Age
35y 4m

Created

01.01.1991

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Data Protection Officer mentioned

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
63/100
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
initial-scale=1.0, width=device-width
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Work Sans + Open sans

WCAG Partial
71/100
Readability
/30
24/30

18px · LH 1.56

Hierarchy
/20
19/20

2x ratio · ✓ H1→H6

WCAG
/25
12/25

1:1 min contrast

Performance
/25
16/25

2 fonts · 6 req

Heading Font

Work Sans

Sans36px

Body Font

Open sans

Sans18px

Contrast Ratio

1:1

1 issue

Reading Comfort

~34 CPL

Narrow lines
36px
h1
28px
h2
22px
h3
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.56 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Buy on MyFontsFlesch 0

Color Palette

5 unique colors
Light
#ffffff
Background· 67.50000000000001%
#c0cad4
Primary· 8.8%
#245483
Accent· 8.6%
#809cb4
Secondary· 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

30 Resources

20
Scripts
10
Styles
10
Async
0
Defer

Top Script Sources

local(10)stuk.fi(9)siteimproveanalytics.com(1)

Website Identity

stuk.fi

35 years old
Location detected: 🇫🇮 Finlandvia tld
fi-FI

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Last analyzed: 13 May 2026 at 23:55

Historical Analysis & Change Tracking