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classtube.ru

https://classtube.ru· First analyzed 02 Jun 2026· Updated 02 Jun 2026
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classtube.ru
Desktop screenshot of classtube.ru
Mobile screenshot of classtube.ru
Mobile

Sponsored

Hosting Provider

SPDNet Telekomunikasyon Hizmetleri Bilgi Teknolojileri Taahhut Sanayi Ve Ticaret A

IP Address

45.141.209.194

Site Location

🇷🇺 Russiavia tld

Server Location

🇺🇦 Kyiv, Ukraine

ASN

AS29182

Organization

SPDNet Telekomunikasyon Hizmetleri Bilgi Teknolojileri Taahhut Sanayi Ve Ticaret A

Server

Nginx

Nameservers

ns1.adminvps.ru.ns4.adminvps.net.ns2.adminvps.net.

Performance

75

Core Web Vitals

Weight

First Contentful Paint
3.1 s10%
Speed Index
4.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.6 MB
119 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
SPDNet Telekomunikasyon Hizmetleri Bilgi Teknolojileri Taahhut Sanayi Ve Ticaret A

Technology Stack

9 Technologies Detected

Libraries

2
jQuery
jQuery UI

CSS Frameworks

2
Bootstrap
Tailwind CSS

Other

1
Highcharts

UI Components

1
Swiper

Other

1
Socket.io

Icon Libraries

1
Font Awesome

Web Servers

1
Nginx

SEO Analysis

C69/100
19
8
0
Meta Tags10/15
Content10/12
Headings5/8
Technical21/25
E-E-A-T2/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
C
classtube.ruclasstube.ru

ClassTube - Образовательный Tube. Бесплатные образовательные видео

ClassTube - Образовательный Tube. Образовательные курсы, уроки и видео. Преподаватели, учителя, наставники, менторы, работодатели, государственные органы мог...

Description truncated.
Title Length66 chars

Recommended: 50-60 chars (~404px / 580px)

Description Length346 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    11 rules

    Local SEO

    Local Search Readiness

    14/100
    Poor
    4 13 1

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

    Sponsored

    AI & LLM Readiness

    F38/100
    Bot Access
    20/25
    Machine Read.
    9/25
    Schema Data
    1/25
    Citation
    8/25

    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:3%
    Words:1,309
    Token eff.:Optimal
    Depth:1/5

    Structured Data

    Microdata
    Organization×1.1(min)microdata

    Citation Readiness

    Opening Summary22w
    Descriptive Headingsavg 1w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (12)
    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.
    D
    59/100
    11
    Passed
    6
    Critical
    5
    Warnings
    Images & Alt Text
    15/20
    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
    0/15
    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
    4/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    8/15
    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.
    11/100
    F
    582 mg
    CO₂e / view
    4.6 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    666 mg
    vs
    Returning (cached)
    333 mg
    Annual (10K/mo)
    69.9 kg
    Emission Segments
    Data Center
    130 mg
    Network
    140 mg
    Device
    313 mg
    Resource Breakdown
    JavaScript
    528.2 KB
    Images
    3.8 MB
    CSS
    215.7 KB
    HTML
    50.2 KB
    Other
    314 B
    Green Hosting Not Verified
    SPDNet Telekomunikasyon Hizmetleri Bilgi Teknolojileri Taahhut Sanayi Ve Ticaret A
    9 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    67d

    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/1.1

    Valid From

    10.05.2026

    Valid Until

    08.08.2026

    Subject Alternative Names (2)

    classtube.ruwww.classtube.ru

    SHA-256 Fingerprint

    D6:91:0A:BB:E2:C9:B7:D9:40:56:79:BD:31:48:63:E0:06:01:A5:9C...

    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)
    connection
    keep-alive
    content-encoding
    📦 Gzip(gzip)
    content-length
    51062
    content-type
    text/html; charset=UTF-8
    date
    Tue, 02 Jun 2026 07:20:48 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (1)

    mail.classtube.ru

    Domain Information

    classtube.ru

    Domain Age
    6y 7m

    Created

    19.10.2019

    Expires

    19.10.2026

    Registrar

    REGRU-RU

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked
    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.
    D
    54/100
    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, maximum-scale=1
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Lato

    WCAG Partial
    64/100
    Readability
    /30
    22/30

    14px · LH 1.43

    Hierarchy
    /20
    13/20

    4.29x ratio

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    13/25

    1 font · 3 req

    Heading Font

    Lato

    Sans60px

    Body Font

    Lato

    Sans14px

    Contrast Ratio

    1:1

    7 issues

    Reading Comfort

    Single Font Family

    left aligned
    60px
    h1
    14px
    h3
    16px
    h4
    14px
    p

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

    ✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

    ⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ✅ Strong hierarchy: Headlines are 4.3x larger than body text.

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

    Buy on MyFonts

    Color Palette

    11 unique colors
    21:1 AAA Dark
    #000000
    Background· 32.300000000000004%
    #ffffff
    Background· 17.4%
    #fff421
    Primary· 8.8%
    #bfbba1
    Secondary· 7.9%
    #594f3c
    Secondary· 5.6%
    #87a195
    Secondary· 3.7%
    #351716
    Secondary· 1.9%
    #fcf687
    Accent· 0.3%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    classtube.ru(19)gstatic.com(1)

    Website Identity

    classtube.ru

    6 years old
    Location detected: 🇷🇺 Russiavia tld
    REGRU-RUru

    Sponsored

    Last analyzed: 02 Jun 2026 at 07:21

    Historical Analysis & Change Tracking

    classtube.ru Technology Stack - Built With jQuery, jQuery UI, Highcharts, Swiper, Socket.io | StackOptic | StackOptic