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irf.se

https://irf.se· First analyzed 12 May 2026· Updated 12 May 2026
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irf.se
Desktop screenshot of irf.se
Mobile screenshot of irf.se
Mobile

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Hosting Provider

IRF

IP Address

193.10.33.87

Site Location

🇸🇪 Swedenvia phone

Server Location

🇸🇪 Kiruna, Sweden

ASN

AS1653

Server

OpenResty

Nameservers

sunic.sunet.se.skoll.irf.se.dns.irf.se.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
702 ms10%
Speed Index
913 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1 MB
19 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Hugov0.154.5
Infrastructure
Hosting
IRF

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Web Servers

1
OpenResty

SEO Analysis

D58/100
16
10
1
Meta Tags7/15
Content10/12
Headings3/8
Technical15/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
I
irf.seirf.se

Institutet för rymdfysik

Institutet för rymdfysik (IRF) är ett statligt forskningsinstitut under Utbildningsdepartementet. IRF bedriver grundforskning och forskarutbildning i rymdfys...

Description truncated.
Title Length24 chars

Recommended: 50-60 chars (~145px / 580px)

Description Length388 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

2 sub-sitemaps

robots.txt

1 rules

Allows all crawlers

Local SEO

Local Search Readiness

19/100
Poor
5 10 2

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

Sponsored

AI & LLM Readiness

D41/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
10/25

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
def. listsnavheader/footer
Text ratio:8%
Words:1,004
Token eff.:Optimal
Sections/1K:14.9
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary359w
Descriptive Headingsavg 3.9w
Canonical URL
Open Graph2/3
Twitter Card0/3
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.
B
78/100
11
Passed
3
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
9/15
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...
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.
56/100
B
129 mg
CO₂e / view
1.0 MB
Page Weight
70%
Cleaner Than
New Visitor
147 mg
vs
Returning (cached)
74 mg
Annual (10K/mo)
15.4 kg
Emission Segments
Data Center
29 mg
Network
31 mg
Device
69 mg
Resource Breakdown
JavaScript
11.0 KB
Images
856.4 KB
CSS
138.8 KB
HTML
34.0 KB
Green Hosting Not Verified
IRF
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

11.05.2026

Valid Until

09.08.2026

Subject Alternative Names (1)

*.irf.se

SHA-256 Fingerprint

5F:95:1D:CB:DB:3B:6C:E8:17:B0:62:0A:3E:6A:23:A9:6D:6E:2C:BA...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-type
text/html
date
Tue, 12 May 2026 15:02:58 GMT
etag
W/"6a0337f0-18ab9"
last-modified
Tue, 12 May 2026 14:23:44 GMT
server
openresty
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

mailfilter-ng-1.sunet.se
mailfilter-ng-3.sunet.se
mailfilter-ng-4.sunet.se

Domain Information

irf.se

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
60/100
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

Roboto + Roboto Serif

WCAG AA
70/100
Readability
/30
20/30

16px · LH 1.80

Hierarchy
/20
8/20
WCAG
/25
21/25

5.79:1 min contrast

Performance
/25
21/25

System fonts

Heading Font

Roboto

Sans

Body Font

Roboto Serif

Serif16px

Contrast Ratio

5.79:1

WCAG AA (≥4.5:1)

Reading Comfort

~35 CPL

Narrow lines
19px
h2
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

❌ Very complex text: Flesch score 5/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.8:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 5

Color Palette

12 unique colors
3.8:1 AA Large Light
#ffffff
Text· 13.1%
#88827b
Other· 8.2%
#002d71
Primary· 15.2%
#040f0f
Accent· 12.4%
#08412d
Accent· 10.1%
#048947
Accent· 9.7%
#056736
Accent· 8.9%
#08232a
Accent· 6.3%

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

4 Resources

1
Scripts
3
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

irf.se

irf@irf.se
+4698079000

Institutet för rymdfysikBox 812SE-981 28 Kiruna

Location detected: 🇸🇪 Swedenvia phone
sv

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Last analyzed: 12 May 2026 at 15:03

Historical Analysis & Change Tracking