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tu.berlin

https://tu.berlin· First analyzed 20 Mar 2026· Updated 20 Mar 2026
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tu.berlin
Desktop screenshot of tu.berlin
Mobile screenshot of tu.berlin
Mobile

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Hosting Provider

Cstub

IP Address

141.23.73.70

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Cstub

Nameservers

dns-2.dfn.de.dns-3.dfn.de.ns.tu-berlin.de.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
919 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
24 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

SEO Analysis

B78/100
23
6
1
Meta Tags13/15
Content11/12
Headings3/8
Technical24/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
T
tu.berlintu.berlin

Technische Universität Berlin - TU Berlin

Mitten in Berlin entstehen bei uns an der Universität die Ideen für die Zukunft. Zum Nutzen der Gesellschaft.

Title Length41 chars

Recommended: 50-60 chars (~238px / 580px)

Description Length109 chars

Recommended: 120-160 chars

Issues (1)

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

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

39 URLs

39 sub-sitemaps

robots.txt

120 rules

Local SEO

Local Search Readiness

19/100
Poor
6 11 1

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

F39/100
Bot Access
5/25
Machine Read.
11/25
Schema Data
6/25
Citation
17/25

AI Bot Access

1/14 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:9%
Words:1,027
Token eff.:Optimal
Sections/1K:23.4
Depth:2/5

Structured Data

2 JSON-LD
Article×1.2microdataWebSiteBreadcrumbList

Citation Readiness

Opening Summary27w
Descriptive Headingsavg 4.5w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
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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.
A
86/100
14
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
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
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
10/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •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.
50/100
D
223 mg
CO₂e / view
1.8 MB
Page Weight
60%
Cleaner Than
New Visitor
255 mg
vs
Returning (cached)
128 mg
Annual (10K/mo)
26.8 kg
Emission Segments
Data Center
50 mg
Network
54 mg
Device
120 mg
Resource Breakdown
JavaScript
391.5 KB
Images
1.2 MB
CSS
97.7 KB
HTML
99.4 KB
Other
29.3 KB
Green Hosting Not Verified
Cstub
3 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

81%Very Good
Interactive

HTTPS

No WAF

266d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

11.12.2025

Valid Until

11.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

tu.berlinwww.tu.berlin

SHA-256 Fingerprint

B1:D3:77:BD:3A:2C:8B:E0:68:18:34:2E:69:0C:53:8A:1E:E1:5B:C9...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
1675
content-encoding
📦 Gzip(gzip)
content-language
de-DE
content-length
14612
content-security-policy
frame-ancestors https://*.tu.berlin https://stats.tu-berlin....
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

b1861.mx.srv.dfn.de
c1861.mx.srv.dfn.de
a1861.mx.srv.dfn.de

Domain Information

tu.berlin

Domain Age
10y 11m

Created

31.03.2015

Expires

31.03.2026

Last Updated

10.04.2025

Registrar

15

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked
Data Protection Officer mentioned

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
72/100
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, viewport-fit=cover
1 recommendation
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Muli + sans-serif

82/100
Readability
/30
32/40

14px · LH 1.57

Hierarchy
/20
25/25

2.57x ratio

WCAG
/25
15/15

Contrast: undefined

Performance
/25
13/20

1 font

Heading Font

Muli

Sans36px

Body Font

sans-serif

Sans14px

Contrast Ratio

--

Reading Comfort

~36 CPL

Needs attention
36px
h1
28px
h2
32px
h3
14px
p

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.57 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Color Palette

10 unique colors
Light
#ffffff
Background· 40.00000000000001%
#e4edfb
Accent· 10.9%
#990000
Primary· 0%
#1c1f3b
Secondary· 7.5%
#c7a8a9
Secondary· 6.9%
#1445be
Accent· 6.8%
#759eeb
Accent· 6.3%
#dadbe1
Secondary· 6.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

7 Resources

5
Scripts
2
Styles
1
Async
3
Defer

Top Script Sources

static.tu.berlin(4)stats.tu-berlin.de(1)

Website Identity

Technische Universität Berlin

10 years old
15de

Sponsored

Last analyzed: 20 Mar 2026 at 09:27

AI-Powered Analysis

Technical Deep Dive

Technology Analysis for tu.berlin

StackOptic has analyzed this website's technology stack. View the detailed breakdown in the sections above.

Analysis by StackOptic AIMar 20, 2026

AI-Powered Insights

Historical Analysis & Change Tracking