lagen.nu

https://lagen.nu· First analyzed 01 May 2026· Updated 01 May 2026

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lagen.nu

Mobile

Sponsored

Hosting Provider

Linkopings universitet

IP Address

130.236.254.142

Site Location

🇸🇪 Swedenvia ip

Server Location

🇸🇪 Linköping, Sweden

ASN

AS1653

Organization

Linkopings universitet

Server

Nginx

Nameservers

ns1.instantdns.nu.ns2.instantdns.nu.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

572 ms10%

Speed Index

744 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

124 KB

13 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Linkopings universitet

Technology Stack

5 Technologies Detected

CSS Frameworks

Libraries

Analytics

Web Servers

SEO Analysis

D43/100

Meta Tags4/15

Content12/12

Headings3/8

Technical10/25

E-E-A-T0/7

Images0/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

lagen.nulagen.nu

lagen.nu

No description available for this page.

Title Length8 chars

Recommended: 50-60 chars (~45px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

12 issues found

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Local SEO

Local Search Readiness

0/100

Poor

15 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

F36/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

5/25

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

code blocksnav

Text ratio:21%

Words:852

Token eff.:Optimal

Sections/1K:22.3

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary52w

Descriptive Headingsavg 1.2w

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...

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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.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

8/20

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

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

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 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.

53/100

A+

15 mg

CO₂e / view

124.1 KB

Page Weight

95%

Cleaner Than

New Visitor

18 mg

Returning (cached)

9 mg

Annual (10K/mo)

1.8 kg

Emission Segments

Data Center

3 mg

Network

4 mg

Device

8 mg

Resource Breakdown

JavaScript

74.0 KB

CSS

21.0 KB

HTML

28.8 KB

Other

300 B

Green Hosting Not Verified

Linkopings universitet

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

59d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

01.04.2026

Valid Until

30.06.2026

Subject Alternative Names (1)

lagen.nu

SHA-256 Fingerprint

C1:59:0F:17:5B:23:BE:AD:B6:25:ED:BA:51:C1:0F:6E:AA:21:EA:77...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

keep-alive

content-length

29181

content-type

text/html; charset=utf-8

date

Fri, 01 May 2026 14:12:10 GMT

etag

"69133fb9-71fd"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

lagen.nu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

61/100

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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG AA

64/100

Readability

/30

20/30

16px · LH --

Hierarchy

/20

8/20

WCAG

/25

22/25

5.74:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Serif

Body Font

Times New Roman

Serif16px

Contrast Ratio

5.74:1

WCAG AA (≥4.5:1)

Reading Comfort

~36 CPL

Narrow lines

17px

16px

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

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.7:1).

❌ 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 0

Color Palette

7 unique colors

3.36:1 AA Large Light

#ffffff

Background· 91.80000000000001%

#8b8b9a

Other· 1.1%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

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Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

rsrc(2)lagen.nu(1)ajax.googleapis.com(1)maxcdn.bootstrapcdn.com(1)cdn.rawgit.com(1)

Website Identity

lagen.nu

Location detected: 🇸🇪 Swedenvia ip

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Last analyzed: 01 May 2026 at 14:13

Historical Analysis & Change Tracking