gumer.info

https://gumer.info· First analyzed 30 Apr 2026· Updated 30 Apr 2026

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gumer.info

Mobile

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Hosting Provider

JSC "TIMEWEB"

IP Address

147.45.155.22

Site Location

🇷🇺 Russiavia ip

Server Location

🇷🇺 Moscow, Russia

ASN

AS9123

Organization

JSC "TIMEWEB"

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

eva.ns.cloudflare.com.gabe.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

361 ms10%

Speed Index

469 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

178 KB

33 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

JSC "TIMEWEB"

CDN

Cloudflare

Technology Stack

6 Technologies Detected

Advertising

Google Ads Google AdSense

Libraries

Analytics

Web Servers

Customer Support

SEO Analysis

D51/100

Meta Tags8/15

Content11/12

Headings8/8

Technical8/21

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

gumer.infogumer.info

Электронная Библиотека Гумер - книги, учебники: история, психология...

Книги для студентов и преподавателей - учебники, справочники, энциклопедии, сборники по гуманитарным наукам

Title truncated.

Title Length119 chars

Recommended: 50-60 chars (~720px / 580px)

Description Length107 chars

Recommended: 120-160 chars

Issues (1)

• Title is too long (119 chars, ~720px). Will be truncated in search results.

13 issues found

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Local SEO

Local Search Readiness

0/100

Poor

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

F38/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

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:16%

Words:808

Token eff.:Optimal

Sections/1K:11.1

Structured Data

No Schema

Citation Readiness

Opening Summary96w

Descriptive Headingsavg 1.4w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

70/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

11/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

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

0/15

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

3 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.

44/100

A+

22 mg

CO₂e / view

177.7 KB

Page Weight

95%

Cleaner Than

New Visitor

25 mg

Returning (cached)

13 mg

Annual (10K/mo)

2.6 kg

Emission Segments

Data Center

5 mg

Network

5 mg

Device

12 mg

Resource Breakdown

JavaScript

123.2 KB

Images

6.4 KB

CSS

11.2 KB

HTML

36.9 KB

Green Hosting Not Verified

JSC "TIMEWEB"

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

No SSL

No WAF

N/A

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HTTP Headers

Developer Console

cache-control

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

connection

keep-alive

content-type

text/html; charset=Windows-1251

date

Thu, 30 Apr 2026 13:14:45 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

route1.mx.cloudflare.net

route2.mx.cloudflare.net

route3.mx.cloudflare.net

Domain Information

gumer.info

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.

48/100

Not Mobile Friendly4 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, maximum-scale=1.0, user-scalable=no

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica

WCAG Partial

61/100

Readability

/30

12/30

13px · LH --

Hierarchy

/20

19/20

2x ratio · ✓ H1→H6

WCAG

/25

14/25

1.71:1 min contrast

Performance

/25

16/25

1 font

Heading Font

Helvetica

Sans26px

Body Font

Helvetica

Sans13px

Contrast Ratio

1.71:1

9 issues

Reading Comfort

~77 CPL

Wide lines

26px

14px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Wide lines: ~76 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.7:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

Buy on MyFonts

Color Palette

10 unique colors

2.02:1 Fail Light

#ffffff

Background· 71.69999999999999%

#b9b6b1

Other· 3.2%

#675040

Secondary· 4.3%

#809734

Primary· 3.4%

#9da585

Secondary· 2.3%

#717946

Primary· 1.8%

#8d7b6c

Secondary· 1.4%

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

w.uptolike.com(4)pagead2.googlesyndication.com(3)mc.yandex.ru(1)ssl.google-analytics.com(1)gumer.info(1)

Website Identity

gumer.info

Location detected: 🇷🇺 Russiavia ip

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Last analyzed: 30 Apr 2026 at 13:16

Historical Analysis & Change Tracking