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runeberg.org

https://runeberg.org· First analyzed 28 Apr 2026· Updated 28 Apr 2026
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runeberg.org
Desktop screenshot of runeberg.org
Mobile screenshot of runeberg.org
Mobile

Sponsored

Hosting Provider

Linkopings universitet

IP Address

130.236.254.233

Site Location

🇸🇪 Swedenvia ip

Server Location

🇸🇪 Linköping, Sweden

ASN

AS1653

Organization

Linkopings universitet

Server

Apache

Nameservers

ns2.loopia.se.ns1.loopia.se.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
361 ms10%
Speed Index
469 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
959 KB
19 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Linkopings universitet

Technology Stack

1 Technologies Detected

Web Servers

1
Apachev2.4.58

SEO Analysis

D42/100
10
13
3
Meta Tags4/15
Content12/12
Headings3/8
Technical7/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
R
runeberg.orgruneberg.org

Project Runeberg

No description available for this page.

Title Length16 chars

Recommended: 50-60 chars (~99px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

16 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

13,879 URLs

robots.txt

19 rules

Local SEO

Local Search Readiness

2/100
Poor
1 14 2

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

Sponsored

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
blockquotes
Text ratio:68%
Words:3,848
Token eff.:Good
Sections/1K:12.2
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary57w
Descriptive Headingsavg 6.2w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

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.
D
56/100
4
Passed
7
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
4/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
12/15
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
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
48/100
B
119 mg
CO₂e / view
959.2 KB
Page Weight
70%
Cleaner Than
New Visitor
136 mg
vs
Returning (cached)
68 mg
Annual (10K/mo)
14.2 kg
Emission Segments
Data Center
27 mg
Network
29 mg
Device
64 mg
Resource Breakdown
Images
944.7 KB
HTML
14.4 KB
Green Hosting Not Verified
Linkopings universitet
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

47d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

17.03.2026

Valid Until

15.06.2026

Subject Alternative Names (2)

runeberg.orgwww.runeberg.org

SHA-256 Fingerprint

6E:32:5A:6E:2D:A5:11:EF:F0:85:45:55:70:A8:E1:C7:5D:53:77:F2...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
14464
content-type
text/html
date
Tue, 28 Apr 2026 17:34:20 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

50

SPF
DKIM
DMARC

MX Records (2)

mailcluster.loopia.se
mail2.loopia.se

Domain Information

runeberg.org

Domain Age
26y 5m

Created

21.11.1999

Expires

21.11.2026

Last Updated

09.11.2025

Registrar

Ascio Technologies, Inc. Danmark - Filial af Ascio technologies, Inc. USA

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.
F
27/100
Not Mobile Friendly
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.
5 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Times New Roman

WCAG Partial
60/100
Readability
/30
21/30

16px · LH --

Hierarchy
/20
8/20
WCAG
/25
17/25

1:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Times New Roman

Serif

Body Font

Times New Roman

Serif16px

Contrast Ratio

1:1

6 issues

Reading Comfort

~32 CPL

Narrow lines
24px
h2
19px
h3
16px
p

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

⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.0:1).

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

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 38

Color Palette

8 unique colors
7.81:1 AAA Light
#ffffff
Background· 65.5%
#595050
Other· 3.3%
#bf9e9d
Primary· 2.6%
#d4bdba
Secondary· 1.8%

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

Sponsored

Website Identity

runeberg.org

editors@runeberg.org
26 years old
Location detected: 🇸🇪 Swedenvia ip
Ascio Technologies, Inc. Danmark - Filial af Ascio technologies, Inc. USA

Sponsored

Last analyzed: 28 Apr 2026 at 17:34

Historical Analysis & Change Tracking