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klex.ru

https://klex.ru· First analyzed 11 May 2026· Updated 11 May 2026
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klex.ru
Desktop screenshot of klex.ru
Mobile screenshot of klex.ru
Mobile

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Hosting Provider

Agavacompany

IP Address

89.108.94.98

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS197695

Organization

Agavacompany

Server

Nginx

Nameservers

ns5.hosting.reg.ru.ns6.hosting.reg.ru.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
299 ms10%
Speed Index
389 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
98 KB
9 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Agavacompany

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginxv1.18.0

SEO Analysis

D45/100
11
11
2
Meta Tags4/15
Content10/12
Headings8/8
Technical10/25
E-E-A-T0/7
Images1/7
Links3/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
K
klex.ruklex.ru

Klex.ru — архив книг

No description available for this page.

Title Length20 chars

Recommended: 50-60 chars (~119px / 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 (6/6) — critical for accessibility and SEO

13 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

30 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.

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AI & LLM Readiness

F34/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
3/25

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:19%
Words:513
Token eff.:Optimal
Sections/1K:3.9

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 2w
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

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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.
D
51/100
7
Passed
5
Critical
1
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
9/15
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...
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.
53/100
A+
12 mg
CO₂e / view
98.2 KB
Page Weight
95%
Cleaner Than
New Visitor
14 mg
vs
Returning (cached)
7 mg
Annual (10K/mo)
1.5 kg
Emission Segments
Data Center
3 mg
Network
3 mg
Device
7 mg
Resource Breakdown
JavaScript
85.5 KB
Images
5.1 KB
HTML
7.6 KB
Green Hosting Not Verified
Agavacompany
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%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/1.1

Valid From

06.05.2026

Valid Until

04.08.2026

Subject Alternative Names (2)

klex.ruwww.klex.ru

SHA-256 Fingerprint

B2:6A:A9:38:EF:3A:20:1F:79:99:13:42:DB:5B:2E:76:26:C9:93:77...

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
Mon, 11 May 2026 02:55:53 GMT
server
nginx/1.18.0
strict-transport-security
max-age=31536000;
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (2)

mail.klex.ru
mail.klex.ru

Domain Information

klex.ru

Domain Age
17y 7m

Created

06.10.2008

Expires

06.10.2026

Registrar

RD-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.
D
50/100
Mobile Friendly2 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, user-scalable=yes
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Verdana

WCAG AAA
69/100
Readability
/30
19/30

15px · LH 1.40

Hierarchy
/20
12/20

1.47x ratio · ✓ H1→H6

WCAG
/25
24/25

7.15:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Verdana

Sans22px

Body Font

Verdana

Sans15px

Contrast Ratio

7.15:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned
22px
h1
19px
h2

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 7.2:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

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

Buy on MyFonts

Color Palette

8 unique colors
2.38:1 Fail Light
#ffffff
Background· 51.9%
#a8a8a8
Other· 35.7%
#70c8bf
Primary· 1.1%
#9c767d
Secondary· 1%
#daa877
Accent· 0.5%
#f0edb0
Accent· 0.1%

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

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Scripts & Styles

1 Resources

1
Scripts
0
Styles
1
Async
0
Defer

Top Script Sources

mc.yandex.ru(1)

Website Identity

klex.ru

r87vaz3of@list.ru
17 years old
Location detected: 🇷🇺 Russiavia tld
RD-RU

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Last analyzed: 11 May 2026 at 02:56

Historical Analysis & Change Tracking