koob.ru

https://koob.ru· First analyzed 30 Apr 2026· Updated 30 Apr 2026

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koob.ru

Mobile

Sponsored

Hosting Provider

Agavacompany

IP Address

89.108.94.98

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS197695

Organization

Agavacompany

Server

Nginx

Nameservers

ns1.example.com.ns2.example.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

447 ms10%

Speed Index

581 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

236 KB

27 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Agavacompany

Technology Stack

4 Technologies Detected

Analytics

Libraries

Web Servers

SEO Analysis

D57/100

Meta Tags7/15

Content11/12

Headings8/8

Technical10/25

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

koob.rukoob.ru

Куб — электронная библиотека. Саморазвитие и самосовершенствование.

No description available for this page.

Title Length67 chars

Recommended: 50-60 chars (~411px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Most images missing alt text (10/11) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

68 rules

Local SEO

Local Search Readiness

7/100

Poor

3 13 2

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

Sponsored

AI & LLM Readiness

F36/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

5/25

AI Bot Access

13/14 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:23%

Words:1,790

Token eff.:Optimal

Sections/1K:1.7

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.7w

Canonical URL

Open Graph2/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

47/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

11/20

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

5/15

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

ARIA & Roles

1/15

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

4 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.

51/100

A+

29 mg

CO₂e / view

235.9 KB

Page Weight

95%

Cleaner Than

New Visitor

33 mg

Returning (cached)

17 mg

Annual (10K/mo)

3.5 kg

Emission Segments

Data Center

7 mg

Network

7 mg

Device

16 mg

Resource Breakdown

JavaScript

124.0 KB

Images

95.5 KB

CSS

4.6 KB

HTML

11.8 KB

Green Hosting Not Verified

Agavacompany

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

36d

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

07.03.2026

Valid Until

05.06.2026

Subject Alternative Names (2)

koob.ruwww.koob.ru

SHA-256 Fingerprint

51:1B:B8:DF:F3:51:2E:F9:3E:34:D4:96:CC:03:AE:BF:87:DD:47:61...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=windows-1251

date

Thu, 30 Apr 2026 12:32:42 GMT

server

nginx/1.18.0

strict-transport-security

max-age=31536000;

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mail.koob.ru

Domain Information

koob.ru

Domain Age

20y 5m

Created

28.11.2005

Expires

28.11.2026

Registrar

RU-CENTER-RU

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

46/100

Not 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, user-scalable=yes

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

WCAG Partial

72/100

Readability

/30

21/30

16px · LH --

Hierarchy

/20

14/20

1.62x ratio · ✓ H1→H6

WCAG

/25

17/25

2.85:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans26px

Body Font

Arial

Sans16px

Contrast Ratio

2.85:1

5 issues

Reading Comfort

Single Font Family

left aligned

26px

21px

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

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 2.9:1).

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

Color Palette

6 unique colors

Light

#ffffff

Background· 73%

#b5c1ca

Primary· 4.1%

#f7f6d9

Accent· 3.7%

#756788

Secondary· 3.7%

#e5f6fc

Accent· 1.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)mc.yandex.ru(1)googletagmanager.com(1)

Website Identity

koob.ru

koobforever@gmail.com

20 years old

Location detected: 🇷🇺 Russiavia tld

RU-CENTER-RU

Sponsored

Last analyzed: 30 Apr 2026 at 12:33

Historical Analysis & Change Tracking