hdf-energy.com

https://hdf-energy.com· First analyzed 04 Jun 2026· Updated 04 Jun 2026

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hdf-energy.com

Mobile

Sponsored

Hosting Provider

IP Address

81.88.52.173

Site Location

🇫🇷 Francevia phone

Server Location

🇮🇹 Bergamo, Italy

ASN

AS39729

Organization

Server

Nginx

Nameservers

ns1.amenworld.com.ns2.amenworld.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

926 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.2 MB

38 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Icon Libraries

Font Awesome

Web Servers

Nginx

SEO Analysis

C62/100

Meta Tags12/15

Content10/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

hdf-energy.comhdf-energy.com

HDF | Game-changing hydrogen power

Discover a sustainable future with HDF Energy, pioneering large-scale green hydrogen infrastructure and cutting-edge multi-MW fuel cell technology.

Title Length34 chars

Recommended: 50-60 chars (~214px / 580px)

Description Length147 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (17/28) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

106 URLs

robots.txt

Local SEO

Local Search Readiness

19/100

Poor

6 10 2

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

Sponsored

AI & LLM Readiness

D47/100

Bot Access

20/25

Machine Read.

14/25

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

navheader/footer

Text ratio:12%

Words:378

Token eff.:Optimal

Sections/1K:15.9

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary23w

Descriptive Headingsavg 11.7w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (6)

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.

89/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

20/20

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

13/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

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

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

401 mg

CO₂e / view

3.2 MB

Page Weight

30%

Cleaner Than

New Visitor

458 mg

Returning (cached)

229 mg

Annual (10K/mo)

48.1 kg

Emission Segments

Data Center

90 mg

Network

96 mg

Device

215 mg

Resource Breakdown

JavaScript

46.2 KB

Images

1.9 MB

CSS

1.2 MB

HTML

5.1 KB

Green Hosting Not Verified

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

50d

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

Valid From

26.04.2026

Valid Until

25.07.2026

Subject Alternative Names (2)

hdf-energy.comwww.hdf-energy.com

SHA-256 Fingerprint

43:42:48:09:DB:CF:01:32:AB:28:25:7E:2E:0F:F1:37:20:C3:E0:5C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

4957

content-security-policy

frame-ancestors 'self' https://www.hdf-energy.com/ www.hdf-e...

content-type

text/html; charset=utf-8

date

Thu, 04 Jun 2026 12:12:07 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (4)

vade-mx-eu-fallback02.hornetsecurity.com

vade-mx-fr01.hornetsecurity.com

vade-mx-fr02.hornetsecurity.com

vade-mx-eu-fallback01.hornetsecurity.com

Domain Information

hdf-energy.com

Domain Age

13y 8m

Created

01.10.2012

Expires

01.10.2026

Last Updated

02.10.2025

Registrar

DNSSEC

Not Enabled

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.

63/100

Mobile Friendly

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Montserrat + Roboto

WCAG Partial

77/100

Readability

/30

20/30

16px · LH 1.30

Hierarchy

/20

20/20

2.62x ratio · ✓ H1→H6

WCAG

/25

17/25

1.08:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Montserrat

Sans42px

Body Font

Roboto

Sans16px

Contrast Ratio

1.08:1

11 issues

Reading Comfort

~31 CPL

Narrow lines

42px

24px

16px

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

⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 18/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 1.1:1).

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

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

Buy on MyFontsFluid Type (rem)Flesch 18

Color Palette

10 unique colors

6.68:1 AA Light

#ffffff

Background· 45.6%

#5e5c57

Other· 6.5%

#8bb2d7

Primary· 7.2%

#647962

Secondary· 6.6%

#cfe9f0

Accent· 5.6%

#bfcdd2

Secondary· 5.4%

#344a56

Secondary· 5.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)kit.fontawesome.com(1)

Website Identity

hdf-energy.com

[email protected]

+33(0)556771111

13 years old

Location detected: 🇫🇷 Francevia phone

Social Profiles

Sponsored

Last analyzed: 04 Jun 2026 at 12:12

Historical Analysis & Change Tracking