quantum-espresso.org

https://quantum-espresso.org· First analyzed 22 May 2026· Updated 22 May 2026

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Mobile

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Hosting Provider

Aruba Business srl

IP Address

93.186.242.122

Site Location

🇮🇹 Italyvia ip

Server Location

🇮🇹 Arezzo, Italy

ASN

AS31034

Organization

Aruba Business srl

Server

Apache

Nameservers

dns200.anycast.me.ns200.anycast.me.

Performance

Core Web Vitals

Weight

First Contentful Paint

734 ms10%

Speed Index

954 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5.1 MB

104 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

QEThemev0.1.1Custom

by NEWEB

View Theme

Technology Stack

13 Technologies Detected

Plugins

Contact Form 7

Rex Download Manager Give Download Monitor

Libraries

CSS Frameworks

Frameworks

Other

Fonts

Web Servers

SEO Analysis

C67/100

Meta Tags7/15

Content6/12

Headings5/8

Technical24/25

E-E-A-T2/7

Images2/7

Links2/5

URL5/5

Social4/5

Freshness4/4

Mobile3/4

Indexability3/3

quantum-espresso.orgquantum-espresso.org

Quantum Espresso - Advancing quantum simulations of materials for e...

Is an integrated suite of open-source computer codes for electronic-structure calculations and materials modeling at the nanoscale. It is based on density-fu...

Title truncated. Description truncated.

Title Length74 chars

Recommended: 50-60 chars (~459px / 580px)

Description Length208 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (74 chars, ~459px). Will be truncated in search results.
• Most images missing alt text (76/76) — critical for accessibility and SEO

11 issues found

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Crawlability

Sitemap

Type: index

5 URLs

5 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

14/100

Poor

4 13

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

Sponsored

AI & LLM Readiness

D45/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

7/25

Citation

11/25

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:778

Token eff.:Optimal

Structured Data

5 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

69/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

15/20

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

15/15

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

ARIA & Roles

4/15

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.

20/100

530 mg

CO₂e / view

5.1 MB

Page Weight

15%

Cleaner Than

New Visitor

606 mg

Returning (cached)

303 mg

Annual (10K/mo)

63.6 kg

Emission Segments

Data Center

26 mg

Network

156 mg

Device

348 mg

Resource Breakdown

JavaScript

4.1 MB

Images

421.2 KB

CSS

363.4 KB

Fonts

1.0 KB

HTML

296.3 KB

Green Hosting Verified

Aruba.it

GWF Verified

8 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

95%Excellent

Static / Informational

HTTPS

No WAF

42d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.04.2026

Valid Until

04.07.2026

Subject Alternative Names (2)

quantum-espresso.orgwww.quantum-espresso.org

SHA-256 Fingerprint

8A:70:BF:29:69:1A:7C:FE:35:B8:DC:B8:A1:ED:0D:40:20:28:C0:89...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-type

text/html; charset=UTF-8

date

Fri, 22 May 2026 22:02:59 GMT

link

<https://www.quantum-espresso.org/wp-json/>; rel="https://ap...

permissions-policy

geolocation=(), camera=(), microphone=(), payment=()

referrer-policy

no-referrer-when-downgrade

server

Apache

Good Warning Issue

Email Infrastructure

OVH Email

Score

SPF

DKIM

DMARC

MX Records (3)

mx1.mail.ovh.net

mx3.mail.ovh.net

mx2.mail.ovh.net

Domain Information

quantum-espresso.org

Domain Age

20y 11m

Created

17.06.2005

Expires

17.06.2026

Last Updated

03.09.2025

Registrar

OVH sas

DNSSEC

Not Enabled

Privacy & Compliance

iubenda

Cookie Consent Banner

iubenda

GDPR Indicators

Cookie consent banner detected

CMP: iubenda

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.

85/100

Mobile Friendly34 breakpoints

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

Lato + -apple-system

WCAG Partial

70/100

Readability

/30

17/30

14px · LH 1.40

Hierarchy

/20

14/20

4.93x ratio

WCAG

/25

17/25

2.73:1 min contrast

Performance

/25

22/25

System fonts

Heading Font

Lato

Sans69px

Body Font

-apple-system

Sans14px

Contrast Ratio

2.73:1

11 issues

Reading Comfort

~39 CPL

Narrow lines

69px

42px

38px

23px

14px

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

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

⚠️ Hard to read: Flesch score 36/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 2.7:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 4.9x larger than body text.

GGoogle Fonts Buy on MyFontsFluid Type (rem)Flesch 36

Color Palette

6 unique colors

7.9:1 AAA Dark

#000000

Background· 25.400000000000002%

#9d9eaa

Other· 4.2%

#e6eaec

Primary· 27.099999999999998%

#bfc8d3

Secondary· 20%

#d2d8e0

Secondary· 18.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

IubendaSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

quantum-espresso.org(13)cdn.iubenda.com(5)cs.iubenda.com(2)

Website Identity