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4brain.ru

https://4brain.ru· First analyzed 08 May 2026· Updated 08 May 2026
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4brain.ru
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Hosting Provider

Rusonyx, Ltd

IP Address

89.253.238.220

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS41535

Organization

Rusonyx, Ltd

Server

Nginx

Nameservers

ns1.reg.ru.ns2.reg.ru.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
788 ms10%
Speed Index
1.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.9 MB
244 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Rusonyx, Ltd

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Libraries

2
jQuery
jQuery UI

Analytics

2
Google Analytics
Facebook Pixel

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Advertising

1
TikTok Pixel

Web Servers

1
Nginxv1.4.6

SEO Analysis

C67/100
19
8
0
Meta Tags14/15
Content11/12
Headings8/8
Technical15/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile1/4
Indexability3/3
4
4brain.ru4brain.ru

4brain - онлайн-платформа по обучению soft skills

Онлайн-курсы, статьи, книги, полезные материалы, онлайн-упражнения, игры и тренажёры для развития междисциплинарных гибких навыков (soft skills).

Title Length49 chars

Recommended: 50-60 chars (~295px / 580px)

Description Length145 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    3 URLs

    3 sub-sitemaps

    robots.txt

    116 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    4/100
    Poor
    1 15 2

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

    Sponsored

    AI & LLM Readiness

    D41/100
    Bot Access
    20/25
    Machine Read.
    8/25
    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:17%
    Words:3,928
    Token eff.:Poor Structure
    Sections/1K:1.3
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary48w
    Descriptive Headingsavg 5.2w
    Canonical URL
    Open Graph2/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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.
    C
    69/100
    9
    Passed
    4
    Critical
    2
    Warnings
    Images & Alt Text
    15/20
    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
    10/15
    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
    7/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    4 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.
    16/100
    F
    617 mg
    CO₂e / view
    4.9 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    705 mg
    vs
    Returning (cached)
    352 mg
    Annual (10K/mo)
    74.0 kg
    Emission Segments
    Data Center
    138 mg
    Network
    148 mg
    Device
    331 mg
    Resource Breakdown
    JavaScript
    272.9 KB
    Images
    517.7 KB
    CSS
    4.1 MB
    HTML
    35.9 KB
    Other
    1.3 KB
    Green Hosting Not Verified
    Rusonyx, Ltd
    8 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    58d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/1.1

    Valid From

    06.04.2026

    Valid Until

    05.07.2026

    Subject Alternative Names (1)

    4brain.ru

    SHA-256 Fingerprint

    72:BC:02:40:B9:42:60:AD:F8:A8:36:93:1C:DC:DD:CA:F7:50:56:0E...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    connection
    keep-alive
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=UTF-8
    date
    Fri, 08 May 2026 19:25:42 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    Yandex Mail

    Score

    75

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (1)

    mx.yandex.ru

    Domain Information

    4brain.ru

    Domain Age
    14y 2m

    Created

    15.02.2012

    Expires

    15.02.2027

    Registrar

    REGRU-RU

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    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
    68/100
    Mobile Friendly8 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=1.0
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Raleway

    WCAG Partial
    67/100
    Readability
    /30
    21/30

    22px · LH --

    Hierarchy
    /20
    17/20

    2.27x ratio · ✓ H1→H6

    WCAG
    /25
    18/25

    1.82:1 min contrast

    Performance
    /25
    11/25

    1 font · 9 req

    Heading Font

    Raleway

    Sans50px

    Body Font

    Raleway

    Sans22px

    Contrast Ratio

    1.82:1

    2 issues

    Reading Comfort

    ~34 CPL

    Narrow lines
    50px
    h1
    46px
    h2
    28px
    h3
    22px
    p

    ✅ Excellent readability: 22px body text is ideal for all devices.

    ⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.8:1).

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

    ✅ Strong hierarchy: Headlines are 2.3x larger than body text.

    ✅ Lean font stack: 1 font families keeps load times fast.

    ⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

    Buy on MyFonts

    Color Palette

    10 unique colors
    2.3:1 Fail Light
    #ffffff
    Primary· 82.4%
    #b4a8aa
    Other· 2.1%
    #3c5afd
    Primary· 3.6%
    #e0e3eb
    Secondary· 2.2%
    #c7c7d1
    Secondary· 2.2%
    #8c94b4
    Secondary· 2%
    #192365
    Accent· 1.6%
    #6665a3
    Secondary· 1%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    27 Resources

    17
    Scripts
    10
    Styles
    6
    Async
    4
    Defer

    Top Script Sources

    4brain.ru(7)local(4)top-fwz1.mail.ru(2)mc.yandex.ru(1)googletagmanager.com(1)

    Website Identity

    4brain.ru

    14 years old
    Location detected: 🇷🇺 Russiavia tld
    REGRU-RU📧 Yandex Mailru

    Sponsored

    Last analyzed: 08 May 2026 at 19:26

    Historical Analysis & Change Tracking

    4brain.ru Technology Stack - Built With jQuery, jQuery UI, Swiper, Tailwind CSS, Google Analytics | StackOptic | StackOptic