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istegroup.com

https://istegroup.com· First analyzed 30 May 2026· Updated 30 May 2026
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istegroup.com
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Hosting Provider

OVHcloud
ovhcloud.com

IP Address

54.36.208.132

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Gravelines, France

ASN

AS16276

Organization

chen zexin

Server

Apache

Nameservers

dns101.ovh.net.ns101.ovh.net.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
941 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.9 MB
118 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.9.1
cms
SciBooksv1.0Custom
by Yhello
View Theme

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

21 Technologies Detected

Plugins

12
Woocommerce Gateway Realex Redirect
Show Products By Attributes Variations
Pricing Deals For Woocommerce
Contact Form 7
Superfly MenuMasterslider
Woocommerce Cart Tab
WooCommerce
Qtranslate XPage Links ToPopup Maker
Yoast SEO

Libraries

2
jQueryv3.7.1
jQuery UI

Analytics

2
Google Analytics
Google Analytics 4

Advertising

2
Google AdsGoogle AdSense

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Web Servers

1
Apache

SEO Analysis

B76/100
22
10
0
Meta Tags9/15
Content11/12
Headings7/8
Technical23/25
E-E-A-T3/7
Images4/7
Links2/5
URL5/5
Social4/5
Freshness4/4
Mobile1/4
Indexability3/3
I
istegroup.comistegroup.com

ISTE Group – ISTE Editions

Leader de l'édition française de livres en sciences et techniques. ISTE Group publie des livres et des ebooks scientifiques en français et en anglais.

Title Length26 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length150 chars

Recommended: 120-160 chars

Issues (0)

    10 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    36 URLs

    36 sub-sitemaps

    robots.txt

    Local SEO

    Local Search Readiness

    20/100
    Needs Work
    6 11 1

    Sponsored

    AI & LLM Readiness

    D49/100
    Bot Access
    20/25
    Machine Read.
    8/25
    Schema Data
    4/25
    Citation
    17/25

    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:5%
    Words:1,370
    Token eff.:Optimal
    Depth:1/5

    Structured Data

    4 JSON-LD
    WebSiteBreadcrumbListSearchAction

    Citation Readiness

    Opening Summary101w
    Descriptive Headingsavg 2w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
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    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
    75/100
    11
    Passed
    4
    Critical
    1
    Warnings
    Images & Alt Text
    18/20
    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
    10/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    11/15
    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.
    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.
    56/100
    C
    199 mg
    CO₂e / view
    1.9 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    227 mg
    vs
    Returning (cached)
    114 mg
    Annual (10K/mo)
    23.9 kg
    Emission Segments
    Data Center
    10 mg
    Network
    59 mg
    Device
    131 mg
    Resource Breakdown
    JavaScript
    425.3 KB
    Images
    1.3 MB
    CSS
    186.4 KB
    Fonts
    930 B
    HTML
    30.1 KB
    Other
    20.1 KB
    Green Hosting Verified
    OVHcloud
    GWF Verified
    4 recommendations
    • •Carbon footprint recommendation preview...
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    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    85d

    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

    26.05.2026

    Valid Until

    24.08.2026

    Subject Alternative Names (3)

    istegroup.comnew.istegroup.comwww.istegroup.com

    SHA-256 Fingerprint

    3E:38:24:F7:EB:00:76:6F:4C:E7:88:48:D4:12:11:3F:2D:D7:85:69...

    Top Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    30565
    content-type
    text/html; charset=UTF-8
    date
    Sat, 30 May 2026 14:53:56 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    OVH Email

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (3)

    mx1.ovh.net
    mx2.ovh.net
    mxb.ovh.net

    Domain Information

    istegroup.com

    Domain Age
    10y 11m

    Created

    09.06.2015

    Expires

    09.06.2035

    Last Updated

    10.06.2025

    Registrar

    123-Reg Limited

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    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
    78/100
    Mobile Friendly7 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, maximum-scale=1.0, user-scalable=no
    2 recommendations
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    HelveticaNeue-Light

    WCAG Partial
    73/100
    Readability
    /30
    20/30

    17px · LH 1.62

    Hierarchy
    /20
    18/20

    2.35x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    1:1 min contrast

    Performance
    /25
    18/25

    2 fonts · 4 req

    Heading Font

    HelveticaNeue-Light

    Sans40px

    Body Font

    HelveticaNeue-Light

    Sans17px

    Contrast Ratio

    1:1

    16 issues

    Reading Comfort

    ~38 CPL

    Narrow lines
    40px
    h1
    19px
    h2
    15px
    h4
    17px
    p

    ✅ Excellent readability: 17px body text is ideal for all devices.

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

    ⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 2.4x larger than body text.

    ✅ Lean font stack: 2 font families keeps load times fast.

    GGoogle FontsBuy on MyFontsFlesch 0

    Color Palette

    5 unique colors
    3.2:1 AA Large Dark
    #0e0e10
    Background· 60.300000000000004%
    #666355
    Secondary· 3.5%
    #ffffff
    Primary· 0%
    #aaac9a
    Secondary· 7.2%
    #f1efeb
    Secondary· 6.5%

    Business & Marketing Stack

    2 Tools Detected

    Advanced

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Google AdsEnterprise

    Ad platforms and retargeting pixels

    2

    Categories

    2

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Ad Networks

    Google AdSense

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    3
    Async
    4
    Defer

    Top Script Sources

    istegroup.com(15)pagead2.googlesyndication.com(2)app.boei.help(2)googletagmanager.com(1)

    Website Identity

    ISTE Group - Éditeur des Sciences

    Leader de l'édition française de livres en sciences et techniques. ISTE Group publie des livres et des ebooks scientifiques en français et en anglais.

    www.istegroup.com/
    10 years old
    Location detected: 🇫🇷 Francevia ip
    123-Reg Limited📧 OVH Emailfr-FR

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    Last analyzed: 30 May 2026 at 14:54

    Historical Analysis & Change Tracking