StackOptic
Back to Search
21vek.by favicon

21vek.by

https://21vek.by· First analyzed 18 May 2026· Updated 18 May 2026
Export
21vek.by
Desktop screenshot of 21vek.by
Mobile screenshot of 21vek.by
Mobile

Sponsored

Hosting Provider

VEL-UMTS

IP Address

178.163.240.225

Site Location

🇧🇾 Belarusvia phone

Server Location

🇧🇾 Minsk, Belarus

ASN

AS205820

Server

Envoy

Nameservers

ns2.yandexcloud.net.ns1.yandexcloud.net.

Performance

83

Core Web Vitals

Weight

First Contentful Paint
2.0 s10%
Speed Index
2.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
56 KB
56 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Next.js
Infrastructure
Hosting
VEL-UMTS

Technology Stack

4 Technologies Detected

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

SEO Analysis

C62/100
19
7
1
Meta Tags8/15
Content8/12
Headings0/8
Technical19/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
2
21vek.by21vek.by

Онлайн-гипермаркет 21vek.by

⭐️ Доставка и самовывоз по всей Беларуси ✅ Оплата частями ⭐️ Наличная и безналичная оплата ➤➤ Широкий выбор товаров

Title Length27 chars

Recommended: 50-60 chars (~163px / 580px)

Description Length115 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1,543 URLs

1543 sub-sitemaps

robots.txt

72 rules

Sitemap reference found

Local SEO

Local Search Readiness

13/100
Poor
4 12 1

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

Sponsored

AI & LLM Readiness

D42/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
4/25
Citation
11/25

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:2%
Words:388
Token eff.:Optimal

Structured Data

Microdata
Organization×1.1microdataWebSitemicrodataSearchActionmicrodata

Citation Readiness

Opening Summary131w
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...
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.
C
66/100
9
Passed
4
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
5/20
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
7/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
5 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.
58/100
A+
7 mg
CO₂e / view
55.7 KB
Page Weight
95%
Cleaner Than
New Visitor
8 mg
vs
Returning (cached)
4 mg
Annual (10K/mo)
828 g
Emission Segments
Data Center
2 mg
Network
2 mg
Device
4 mg
Resource Breakdown
HTML
55.7 KB
Green Hosting Not Verified
VEL-UMTS
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

187d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

Valid From

06.05.2026

Valid Until

21.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.21vek.by21vek.by

SHA-256 Fingerprint

A2:1C:AC:E9:2D:87:FC:32:F8:0C:6E:54:06:FE:8E:27:F0:AC:94:B2...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-credentials
true
cache-control
🔴 No Cache(no-cache)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Mon, 18 May 2026 05:01:08 GMT
server
envoy
Good Warning Issue

Email Infrastructure

Yandex Mail

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mx.yandex.ru

Domain Information

21vek.by

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected

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
55/100
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=1150

Typography & Readability

Tahoma + Arial

WCAG Partial
51/100
Readability
/30
11/30

10px · LH 1.60

Hierarchy
/20
9/20
WCAG
/25
14/25

1.06:1 min contrast

Performance
/25
17/25

System fonts

Heading Font

Tahoma

Body Font

Arial

Sans10px

Contrast Ratio

1.06:1

31 issues

Reading Comfort

~164 CPL

Too wide
10px
p

❌ Critical: 10px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very long lines: ~164 chars/line causes eye strain. Add max-width constraint.

⚠️ Partial contrast: 31 elements below WCAG AA threshold (min 1.1:1).

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

Color Palette

5 unique colors
3.64:1 AA Large Light
#868686
Other· 66.29999999999998%
#ffffff
Background· 24.6%
#6f0f42
Primary· 5.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

23 Resources

20
Scripts
3
Styles
2
Async
18
Defer

Top Script Sources

cdn21vek.by(18)googletagmanager.com(2)

Website Identity

21vek.by

21@21vek.by
+375 29302 10 21
Location detected: 🇧🇾 Belarusvia phone
📧 Yandex Mail

Sponsored

Last analyzed: 18 May 2026 at 05:01

Historical Analysis & Change Tracking