closbrothers.pl

https://closbrothers.pl· First analyzed 08 Sept 2026· Updated 08 Sept 2026

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closbrothers.pl

Mobile

Sponsored

Hosting Provider

DigitalOcean

digitalocean.com

IP Address

139.59.134.86

Site Location

🇵🇱 Polandvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS14061

Organization

DigitalOcean, LLC

Server

Nginx

Nameservers

ns2.closbrothers.pl.ns3.closbrothers.pl.ns1.closbrothers.pl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

559 ms10%

Speed Index

727 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

557 KB

42 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

DigitalOcean

Technology Stack

6 Technologies Detected

Analytics

Tag Managers

Advertising

Web Servers

SEO Analysis

D57/100

Meta Tags14/15

Content2/12

Headings0/8

Technical17/25

E-E-A-T2/7

Images1/7

Links5/5

URL5/5

Social5/5

Freshness2/4

Mobile1/4

Indexability3/3

closbrothers.plclosbrothers.pl

Clos Brothers – Warszawska Interaktywna Agencja Reklamowa

Poznaj inteligentne rozwiązania reklamowe realizujące cele w dopasowanym budżecie. Agencja interaktywna mieści się w Warszawie, na Czerniakowie. Zapraszamy n...

Description truncated.

Title Length57 chars

Recommended: 50-60 chars (~360px / 580px)

Description Length164 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (25 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (5/5) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

9/100

Poor

3 13 1

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

Sponsored

AI & LLM Readiness

F30/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

1/25

Citation

8/25

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:0%

Words:18

Token eff.:Too Short

Structured Data

1 JSON-LD

Organization×1.1(min)

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card2/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

51/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

6/20

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

14/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

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.

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.

59/100

56 mg

CO₂e / view

556.8 KB

Page Weight

80%

Cleaner Than

New Visitor

64 mg

Returning (cached)

32 mg

Annual (10K/mo)

6.7 kg

Emission Segments

Data Center

3 mg

Network

17 mg

Device

37 mg

Resource Breakdown

JavaScript

303.2 KB

Images

5.2 KB

CSS

220.8 KB

HTML

14.8 KB

Other

12.7 KB

Green Hosting Verified

DigitalOcean

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

71%Good

Static / Informational

HTTPS

No WAF

77d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Asseco Data Systems S.A.

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

25.11.2025

Valid Until

25.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.closbrothers.plclosbrothers.pl

SHA-256 Fingerprint

2F:3D:B7:01:A8:D4:48:36:42:12:A6:07:59:14:47:52:86:FD:3F:44...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

Content-Type, Authorization, Accept, X-LANGUAGE, X-APPLICATI...

access-control-allow-methods

GET, POST, PUT, DELETE, OPTIONS

access-control-allow-origin

content-encoding

📦 Gzip(gzip)

content-length

14865

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mail01.closbrothers.pl

Domain Information

closbrothers.pl

Domain Age

24y 2m

Created

28.06.2002

Expires

27.06.2027

Last Updated

29.05.2026

Registrar

Aftermarket.pl Limited

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.

69/100

Mobile Friendly33 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,minimum-scale=1,initial-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Brandon Grotesque

WCAG Partial

47/100

Readability

/30

13/30

10px · LH --

Hierarchy

/20

8/20

WCAG

/25

13/25

3.2:1 min contrast

Performance

/25

13/25

1 font · 2 req

Heading Font

Brandon Grotesque

Body Font

Brandon Grotesque

Sans10px

Contrast Ratio

3.2:1

Below AA

Reading Comfort

Single Family

center aligned

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

⚠️ Partial contrast: 0 elements below WCAG AA threshold (min 3.2:1).

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

7 unique colors

Light

#ad0e2c

Primary· 43%

#861022

Accent· 19.5%

#561112

Accent· 18.2%

#c80c34

Accent· 10.1%

#d499a2

Secondary· 4.7%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

TikTok PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

analytics.tiktok.com(3)googletagmanager.com(3)connect.facebook.net(3)cdn.ampproject.org(3)google-analytics.com(1)

Website Identity

closbrothers.pl

bi@@uro@closbro@@ther@@s.pl

24 years old

Location detected: 🇵🇱 Polandvia tld

Aftermarket.pl Limitedpl-PL

Social Profiles

Facebook Instagram

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Last analyzed: 08 Sept 2026 at 17:32

Historical Analysis & Change Tracking