offis.de

https://offis.de· First analyzed 12 May 2026· Updated 12 May 2026

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offis.de

Mobile

Sponsored

Hosting Provider

Carl von Ossietzky Universitaet Oldenburg

IP Address

134.106.57.24

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Oldenburg, Germany

ASN

AS680

Organization

Carl von Ossietzky Universitaet Oldenburg

Server

Apache

Nameservers

dns-1.dfn.de.dns-3.dfn.de.dns-2.dfn.de.dns2.offis.de.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.9 s10%

Speed Index

2.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.7 MB

65 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

TYPO3

Infrastructure

Hosting

Carl von Ossietzky Universitaet Oldenburg

Technology Stack

10 Technologies Detected

Libraries

jQueryv1.12.4

jQuery UI

UI Components

Slick Carousel Fancybox

CSS Frameworks

Other

Icon Libraries

Analytics

Web Servers

SEO Analysis

C65/100

Meta Tags8/15

Content11/12

Headings3/8

Technical18/25

E-E-A-T3/7

Images3/7

Links5/5

URL5/5

Social2/5

Freshness0/4

Mobile4/4

Indexability3/3

offis.deoffis.de

OFFIS

OFFIS betreibt anwendungsorientierte Forschungs- und Entwicklungsarbeit in den Informations- und Kommunikationstechnologien mit Schwerpunkten in den Themenbe...

Description truncated.

Title Length5 chars

Recommended: 50-60 chars (~31px / 580px)

Description Length197 chars

Recommended: 120-160 chars

Issues (1)

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

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

Local SEO

Local Search Readiness

10/100

Poor

3 13 2

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

Sponsored

AI & LLM Readiness

D43/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

15/25

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:12%

Words:920

Token eff.:Optimal

Sections/1K:9.8

Structured Data

No Schema

Citation Readiness

Opening Summary23w

Descriptive Headingsavg 9.8w

Canonical URL

Open Graph1/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

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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.

56/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

7/20

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

0/15

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

5 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.

23/100

339 mg

CO₂e / view

2.7 MB

Page Weight

30%

Cleaner Than

New Visitor

387 mg

Returning (cached)

194 mg

Annual (10K/mo)

40.7 kg

Emission Segments

Data Center

76 mg

Network

81 mg

Device

182 mg

Resource Breakdown

JavaScript

236.9 KB

Images

2.2 MB

CSS

206.1 KB

HTML

12.3 KB

Other

300 B

Green Hosting Not Verified

Carl von Ossietzky Universitaet Oldenburg

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

174d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

03.11.2025

Valid Until

03.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.offis.deoffis.de

SHA-256 Fingerprint

8F:97:EE:ED:AB:C1:54:33:E4:0B:CD:F4:29:A1:4C:57:08:87:E0:FC...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-store)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

de-DE

content-length

12251

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

merlin1.offis.de

merlin2.offis.de

merlin3.offis.de

Domain Information

offis.de

Last Updated

19.11.2025

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

55/100

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,minimum-scale=1,maximum-scale=1.0

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

PF Centro Slab W01 Regular + Meta Offc W01 Normal

WCAG Partial

57/100

Readability

/30

22/30

17px · LH 1.47

Hierarchy

/20

8/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

13/25

2 fonts · 4 req

Heading Font

PF Centro Slab W01 Regular

Sans

Body Font

Meta Offc W01 Normal

Sans17px

Contrast Ratio

1:1

40 issues

Reading Comfort

~37 CPL

Narrow lines

42px

24px

21px

17px

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.47 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 8/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 40 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: 2 font families keeps load times fast.

Buy on MyFontsFlesch 8

Color Palette

6 unique colors

Light

#ffffff

Background· 33.099999999999994%

#1a9edf

Primary· 33.099999999999994%

#58b2da

Accent· 10.6%

#71c4e7

Accent· 7.9%

#d4dce1

Secondary· 7.8%

#3b6984

Secondary· 7.7%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(19)offis.de(1)

Website Identity

offis.de

Location detected: 🇩🇪 Germanyvia tld

Social Profiles

Facebook Instagram LinkedIn

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Last analyzed: 12 May 2026 at 13:33

Historical Analysis & Change Tracking