StackOptic
Back to Search
empa.ch favicon

empa.ch

https://empa.ch· First analyzed 25 Apr 2026· Updated 25 Apr 2026
Export
empa.ch
Desktop screenshot of empa.ch
Mobile screenshot of empa.ch
Mobile

Sponsored

Hosting Provider

Eawag/Empa

IP Address

152.88.8.12

Site Location

🇨🇭 Switzerlandvia tld

Server Location

🇨🇭 Zurich, Switzerland

ASN

AS559

Organization

Eawag/Empa

CDN

CDN

Nameservers

dns3.emp-eaw.ch.dns4.emp-eaw.ch.

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.9 MB
164 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Eawag/Empa
CDN
CDN

Technology Stack

6 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Frameworks

1
Reactv16.12.0

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

SEO Analysis

C64/100
17
6
1
Meta Tags11/15
Content11/12
Headings3/8
Technical15/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
E
empa.chempa.ch

Empa - Swiss Federal Laboratories for Materials Science and Technology

Interdisciplinary research institute of the ETH Domain. Empa conducts cutting-edge materials and technology research.

Title Length70 chars

Recommended: 50-60 chars (~427px / 580px)

Description Length117 chars

Recommended: 120-160 chars

Issues (1)

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

7 issues found

Upgrade to view details

Local SEO

Local Search Readiness

14/100
Poor
5 12 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.
10/25
Schema Data
0/25
Citation
13/25

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
nav
Text ratio:4%
Words:1,425
Token eff.:Optimal
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary18w
Descriptive Headingsavg 4.2w
Canonical URL
Open Graph2/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
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
76/100
12
Passed
4
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
12/15
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
7/15
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.
24/100
F
616 mg
CO₂e / view
4.9 MB
Page Weight
15%
Cleaner Than
New Visitor
704 mg
vs
Returning (cached)
352 mg
Annual (10K/mo)
73.9 kg
Emission Segments
Data Center
138 mg
Network
148 mg
Device
331 mg
Resource Breakdown
JavaScript
490.4 KB
Images
2.7 MB
CSS
1.6 MB
HTML
38.2 KB
Other
96.7 KB
Green Hosting Not Verified
Eawag/Empa
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Interactive

HTTPS

No WAF

57d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.12.2025

Valid Until

21.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.empa.ch

SHA-256 Fingerprint

8E:FB:00:5B:62:15:39:1D:16:BD:CB:E3:20:7B:FF:4B:0B:5E:F2:B2...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(private, no-cache, no-store, must-revalidate)
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src 'self'; script-src 'self' 'nonce-37rcqqC++WJzV6l...
content-type
text/html;charset=UTF-8
date
Sat, 25 Apr 2026 22:33:32 GMT
expires
Thu, 01 Jan 1970 00:00:00 GMT
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

empa-ch.mail.protection.outlook.com

Domain Information

empa.ch

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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.
C
66/100
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
initial-scale=1.0, width=device-width
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

OpenSans Regular

WCAG Partial
51/100
Readability
/30
18/30

14px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
14/25

1:1 min contrast

Performance
/25
11/25

1 font · 7 req

Heading Font

OpenSans Regular

Sans

Body Font

OpenSans Regular

Sans14px

Contrast Ratio

1:1

2 issues

Reading Comfort

~38 CPL

Narrow lines
52px
h2
22px
h3
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 6/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFontsFlesch 6

Color Palette

12 unique colors
16.95:1 AAA Light
#ffffff
Background· 40.400000000000006%
#1b1d1c
Text· 5.6%
#423a32
Primary· 8.8%
#575147
Text· 7.1%
#7d5a45
Secondary· 5.7%
#c7b4a6
Secondary· 4.8%
#a89787
Secondary· 4.6%
#dfd8d0
Secondary· 4.5%

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

Scripts & Styles

30 Resources

20
Scripts
10
Styles
10
Async
0
Defer

Top Script Sources

local(18)empa.ch(1)googletagmanager.com(1)

Website Identity

empa.ch

Location detected: 🇨🇭 Switzerlandvia tld
📧 Microsoft 365en-US

Sponsored

Last analyzed: 25 Apr 2026 at 22:33

Historical Analysis & Change Tracking