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polona.pl

https://polona.pl· First analyzed 28 Apr 2026· Updated 28 Apr 2026
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polona.pl
Desktop screenshot of polona.pl
Mobile screenshot of polona.pl
Mobile

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Hosting Provider

Biblioteka Narodowa

IP Address

91.238.85.164

Site Location

🇵🇱 Polandvia tld

Server Location

🇵🇱 Warsaw, Poland

ASN

AS203422

Organization

Biblioteka Narodowa

Server

Nginx

Nameservers

kirdan.nask.net.pl.dns.bn.org.pl.ns03.telnaptelecom.pl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
604 ms10%
Speed Index
785 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.3 MB
250 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
Ghost
Infrastructure
Hosting
Biblioteka Narodowa

Technology Stack

5 Technologies Detected

Frameworks

1
Angularv17.3.12

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Analytics

1
Facebook Pixel

Web Servers

1
Nginx

SEO Analysis

F38/100
10
8
4
Meta Tags4/15
Content3/12
Headings3/8
Technical11/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
P
polona.plpolona.pl

Polona

No description available for this page.

Title Length6 chars

Recommended: 50-60 chars (~35px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

  • • Missing meta description — important for click-through rates in SERPs
  • • Very thin content (1 words). Search engines need substantial content for ranking.
  • • Missing H1 tag — every page should have exactly one H1

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Local SEO

Local Search Readiness

8/100
Poor
2 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.
12/25
Schema Data
0/25
Citation
2/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:1%
Words:893
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
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...
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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.
B
72/100
10
Passed
3
Critical
0
Warnings
Images & Alt Text
20/20
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
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
15/15
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.
1 recommendation
  • •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.
20/100
E
288 mg
CO₂e / view
2.3 MB
Page Weight
50%
Cleaner Than
New Visitor
329 mg
vs
Returning (cached)
165 mg
Annual (10K/mo)
34.6 kg
Emission Segments
Data Center
64 mg
Network
69 mg
Device
155 mg
Resource Breakdown
JavaScript
2.1 MB
Images
561 B
CSS
63.6 KB
HTML
4.5 KB
Other
84.7 KB
Green Hosting Not Verified
Biblioteka Narodowa
5 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

46%Poor
Interactive

HTTPS

No WAF

6d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Unizeto Technologies S.A.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.05.2025

Valid Until

05.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.polona.plpolona.pl

SHA-256 Fingerprint

2A:14:10:63:14:AB:E8:DF:68:52:90:5F:18:30:EC:F5:56:18:94:77...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin
*
cache-control
🔴 No Cache(no-store, no-cache, must-revalidate, proxy-revalidate, max-a...)
content-encoding
📦 Gzip(gzip)
content-type
text/html
date
Tue, 28 Apr 2026 21:53:55 GMT
etag
W/"69f0a50a-4348"
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

95

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

polona-pl.mail.protection.outlook.com

Domain Information

polona.pl

Domain Age
19y 9m

Created

21.07.2006

Expires

21.07.2026

Last Updated

14.07.2025

Registrar

home.pl sp. z o.o.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Data Protection Officer mentioned

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.
C
69/100
Mobile Friendly312 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

PT Serif + PT Sans

WCAG AA
64/100
Readability
/30
22/30

16px · LH 1.38

Hierarchy
/20
8/20
WCAG
/25
18/25

4.72:1 min contrast

Performance
/25
16/25

2 fonts · 22 req

Heading Font

PT Serif

Serif

Body Font

PT Sans

Sans16px

Contrast Ratio

4.72:1

WCAG AA (≥4.5:1)

Reading Comfort

Serif Headlines + Sans Body

left aligned
32px
h2
27px
h3
16px
h4

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 12/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.7:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

Buy on MyFontsFlesch 12

Color Palette

6 unique colors
2.43:1 Fail Light
#ffffff
Background· 32.60000000000001%
#a5a6a9
Other· 10.3%
#7a8193
Primary· 8.9%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

1
Facebook SDKFree

Social widgets and sharing tools

3

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

7 Resources

5
Scripts
2
Styles
1
Async
0
Defer

Top Script Sources

connect.facebook.net(2)local(1)polyfills-OHMTK65Y.js(1)main-OYKJKMYA.js(1)

Website Identity

polona.pl

19 years old
Location detected: 🇵🇱 Polandvia tld
home.pl sp. z o.o.📧 Microsoft 365pl

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Last analyzed: 28 Apr 2026 at 21:54

Historical Analysis & Change Tracking