libcat.ru

https://libcat.ru· First analyzed 22 May 2026· Updated 22 May 2026

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libcat.ru

Mobile

Sponsored

Hosting Provider

Yustus Roman Yurievich PE

IP Address

94.158.220.3

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS61400

Organization

Yustus Roman Yurievich PE

Server

Nginx

Nameservers

ns2.iustus.com.ns1.iustus.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

433 ms10%

Speed Index

563 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

848 KB

74 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Yustus Roman Yurievich PE

Technology Stack

8 Technologies Detected

CSS Frameworks

Libraries

Icon Libraries

Fonts

Advertising

Web Servers

Languages

SEO Analysis

C68/100

Meta Tags12/15

Content3/12

Headings6/8

Technical23/25

E-E-A-T0/7

Images5/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

libcat.rulibcat.ru

Книги читать онлайн бесплатно без регистрации

Большая электронная библиотека ЛибКат — читать книги онлайн полностью бесплатно и без регистрации.

Title Length45 chars

Recommended: 50-60 chars (~279px / 580px)

Description Length98 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (6 words). Search engines need substantial content for ranking.

5 issues found

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Crawlability

Sitemap

Type: index

20 URLs

20 sub-sitemaps

robots.txt

25 rules

Sitemap reference found

Local SEO

Local Search Readiness

14/100

Poor

4 12 2

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

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AI & LLM Readiness

F35/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

1/25

Citation

7/25

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:584

Token eff.:Optimal

Structured Data

Microdata

BreadcrumbListmicrodata

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

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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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.

73/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

12/15

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

4/15

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.

50/100

105 mg

CO₂e / view

848.1 KB

Page Weight

80%

Cleaner Than

New Visitor

120 mg

Returning (cached)

60 mg

Annual (10K/mo)

12.6 kg

Emission Segments

Data Center

23 mg

Network

25 mg

Device

56 mg

Resource Breakdown

JavaScript

230.5 KB

Images

470.0 KB

CSS

90.4 KB

HTML

57.1 KB

Green Hosting Not Verified

Yustus Roman Yurievich PE

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

152d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

06.04.2026

Valid Until

22.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.libcat.rulibcat.ru

SHA-256 Fingerprint

DB:D5:49:6E:3A:B2:D1:51:C1:21:0A:CE:38:15:9F:5F:C4:36:89:39...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, max-age=0, post-check=0...)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Fri, 22 May 2026 09:32:55 GMT

expires

Sat, 22 May 2027 09:32:55 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

msk4.iustus.com

Domain Information

libcat.ru

Domain Age

7y 8m

Created

18.09.2018

Expires

18.09.2026

Registrar

RU-CENTER-RU

DNSSEC

Not Enabled

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.

76/100

Mobile Friendly81 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

Arial

WCAG Partial

76/100

Readability

/30

23/30

14px · LH 1.43

Hierarchy

/20

17/20

2.71x ratio · ✓ H1→H6

WCAG

/25

16/25

3.83:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans38px

Body Font

Arial

Sans14px

Contrast Ratio

3.83:1

1 issue

Reading Comfort

~45 CPL

Optimal (45–75)

38px

14px

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

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

✅ Optimal line length: ~45 chars/line (ideal 45–75 CPL).

✅ Easy to read: Flesch score 100/100 — accessible to general audiences.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.8:1).

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

Flesch 100

Color Palette

11 unique colors

18.86:1 AAA Light

#ffffff

Background· 57.099999999999994%

#0f120f

Secondary· 5.8%

#362a23

Secondary· 6.6%

#1763a5

Primary· 6.5%

#5b5344

Secondary· 6.1%

#a1937c

Secondary· 4.2%

#648194

Secondary· 2.4%

#f2edd7

Accent· 0.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)mc.yandex.ru(1)yastatic.net(1)yandex.ru(1)

Website Identity

libcat.ru

info@libcat.ru

7 years old

Связь с администрацией

Location detected: 🇷🇺 Russiavia tld

RU-CENTER-RUru

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Last analyzed: 22 May 2026 at 09:33

Historical Analysis & Change Tracking