ethresear.ch

https://ethresear.ch· First analyzed 01 May 2026· Updated 01 May 2026

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ethresear.ch

Mobile

Sponsored

Hosting Provider

Ethereum Dev GmbH

IP Address

212.99.218.66

Site Location

🇨🇭 Switzerlandvia tld

Server Location

🇩🇪 Zwönitz, Germany

ASN

AS21413

Organization

Ethereum Dev GmbH

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

alina.ns.cloudflare.com.charles.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

314 ms10%

Speed Index

408 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.1 MB

99 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Ethereum Dev GmbH

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Other

CSS Frameworks

Icon Libraries

Customer Support

Web Servers

SEO Analysis

D56/100

Meta Tags5/15

Content2/12

Headings8/8

Technical20/25

E-E-A-T0/7

Images1/7

Links3/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

ethresear.chethresear.ch

Ethereum Research

Civilized discussion furthering Ethereum research

Title Length17 chars

Recommended: 50-60 chars (~108px / 580px)

Description Length49 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (2 words). Search engines need substantial content for ranking.
• Most images missing alt text (68/69) — critical for accessibility and SEO

6 issues found

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Crawlability

Sitemap

Type: index

2 URLs

2 sub-sitemaps

robots.txt

36 rules

Sitemap reference found

Local SEO

Local Search Readiness

8/100

Poor

2 15 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

F37/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

3/25

Citation

7/25

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:1%

Words:465

Token eff.:Optimal

Structured Data

1 JSON-LD

WebSiteSearchAction

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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

6/20

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

1/15

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

2 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.

20/100

396 mg

CO₂e / view

3.1 MB

Page Weight

30%

Cleaner Than

New Visitor

452 mg

Returning (cached)

226 mg

Annual (10K/mo)

47.5 kg

Emission Segments

Data Center

88 mg

Network

95 mg

Device

212 mg

Resource Breakdown

JavaScript

2.7 MB

Images

156.7 KB

CSS

245.7 KB

HTML

61.8 KB

Green Hosting Not Verified

Ethereum Dev GmbH

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

70%Good

Critical / Transactional

HTTPS

No WAF

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

29.04.2026

Valid Until

05.05.2026

Subject Alternative Names (2)

*.ethresear.chethresear.ch

SHA-256 Fingerprint

5E:35:9F:DB:36:8A:EE:E0:EA:D3:D7:4E:B9:EF:7C:42:18:A7:8D:63...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-headers

Content-Type, Authorization, X-Requested-With

access-control-allow-methods

GET, POST, OPTIONS, DELETE

access-control-allow-origin

https://notes.ethereum.org

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-cache, no-store)

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

Domain Information

ethresear.ch

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.

69/100

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, minimum-scale=1.0, viewport-fit=cover, interactive-widget=resizes-content

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

WCAG Partial

79/100

Readability

/30

24/30

16px · LH 1.40

Hierarchy

/20

19/20

2x ratio · ✓ H1→H6

WCAG

/25

16/25

2.62:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans32px

Body Font

Arial

Sans16px

Contrast Ratio

2.62:1

26 issues

Reading Comfort

Single Font Family

left aligned

32px

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

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

⚠️ Partial contrast: 26 elements below WCAG AA threshold (min 2.6:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Flesch 0

Color Palette

5 unique colors

3.77:1 AA Large Light

#ffffff

Primary· 89.4%

#7f8489

Other· 2.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(20)

Website Identity

Ethereum Research

Location detected: 🇨🇭 Switzerlandvia tld

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Last analyzed: 01 May 2026 at 19:22

Historical Analysis & Change Tracking