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iass-potsdam.de

https://iass-potsdam.de· First analyzed 08 May 2026· Updated 08 May 2026
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iass-potsdam.de
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Mobile

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Hosting Provider

Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ

IP Address

139.17.229.79

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ

Server

Apache

Nameservers

zrt7b.gfz-potsdam.de.deneb.dfn.de.

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%
8 MB
74 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

4 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

Web Servers

1
Apachev2.4.66

SEO Analysis

C67/100
19
7
2
Meta Tags10/15
Content12/12
Headings3/8
Technical19/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
I
iass-potsdam.deiass-potsdam.de

Startseite | Forschungsinstitut für Nachhaltigkeit

No description available for this page.

Title Length50 chars

Recommended: 50-60 chars (~294px / 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

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

6,195 URLs

robots.txt

53 rules

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.

Sponsored

AI & LLM Readiness

D44/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
0/25
Citation
12/25

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
navheader/footer
Text ratio:19%
Words:2,462
Token eff.:Optimal
Sections/1K:12.2
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary18w
Descriptive Headingsavg 4.6w
Canonical URL
Open Graph1/3
Twitter Card2/3
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.
B
75/100
12
Passed
3
Critical
2
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
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
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 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.
31/100
F
1.01 g
CO₂e / view
8.0 MB
Page Weight
5%
Cleaner Than
New Visitor
1.15 g
vs
Returning (cached)
576 mg
Annual (10K/mo)
121.0 kg
Emission Segments
Data Center
225 mg
Network
242 mg
Device
541 mg
Resource Breakdown
JavaScript
242.7 KB
Images
3.4 MB
CSS
141.8 KB
HTML
15.4 KB
Other
4.2 MB
Green Hosting Not Verified
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

160d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

30.03.2026

Valid Until

15.10.2026

Subject Alternative Names (4)

www.rifs-potsdam.derifs-potsdam.deiass-potsdam.dewww.iass-potsdam.de

SHA-256 Fingerprint

18:47:FC:F5:BC:B2:8F:9A:4C:DD:21:20:6E:68:1D:12:9D:CC:DE:B8...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟡 1800s(max-age=1800, public)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
15470
content-type
text/html; charset=UTF-8
content-language
de
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

c1791.mx.srv.dfn.de
a1791.mx.srv.dfn.de
b1791.mx.srv.dfn.de

Domain Information

iass-potsdam.de

Last Updated

15.01.2025

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Privacy policy page linked

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.
B
71/100
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=1.0
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Inter 300

WCAG Partial
68/100
Readability
/30
22/30

20px · LH 1.60

Hierarchy
/20
16/20

2.25x ratio · ✓ H1→H6

WCAG
/25
10/25

3.49:1 min contrast

Performance
/25
20/25

2 fonts · 3 req

Heading Font

Inter 300

Sans45px

Body Font

Inter 300

Sans20px

Contrast Ratio

3.49:1

11 issues

Reading Comfort

~33 CPL

Narrow lines
45px
h1
38px
h2
45px
h3
25px
h4
20px
p

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 4/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 3.5:1).

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

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

Buy on MyFontsFlesch 4

Color Palette

8 unique colors
3.16:1 AA Large Light
#ffffff
Background· 86.79999999999998%
#8d9198
Other· 2.2%
#414856
Primary· 1.6%

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

3 Resources

1
Scripts
2
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

iass-potsdam.de

Location detected: 🇩🇪 Germanyvia tld
de

Social Profiles

LinkedInBluesky

Sponsored

Last analyzed: 08 May 2026 at 06:03

Historical Analysis & Change Tracking