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nb.rs

https://nb.rs· First analyzed 29 Apr 2026· Updated 29 Apr 2026
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nb.rs
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Hosting Provider

Academic Network of Serbia

IP Address

147.91.246.202

Site Location

🇷🇸 Serbiavia tld

Server Location

🇷🇸 Belgrade, Serbia

ASN

AS13092

Organization

Academic Network of Serbia

Server

Apache

Nameservers

ns1e.nb.rs.ns.rcub.bg.ac.rs.ns2e.nb.rs.

Performance

94

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.6 MB
125 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.4.0
cms
Hello Elementorv3.4.5
by Elementor Team
View Theme

Technology Stack

29 Technologies Detected

Plugins

17
Modern Events Calendar LiteEmbedpressFilebirdJustify For Paragraph BlockCookie Law InfoT4B News TickerPojo Accessibility
Elementor
Elementor
Sassy Social ShareLoftloaderBdthemes Element Pack Lite
Google Analytics For Wordpress
Interactive 3D Flipbook Powered Physics EngineWpfront Scroll TopMegamenu
Yoast SEO

Libraries

2
jQueryv3.7.1
jQuery UI

UI Components

2
SwiperOwl Carousel

CSS Frameworks

2
Tailwind CSS
UIkit

Analytics

2
Google Analytics
Google Analytics 4

Other

1
Lottie

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Web Servers

1
Apachev2.4.58

SEO Analysis

C68/100
22
8
2
Meta Tags5/15
Content8/12
Headings1/8
Technical25/25
E-E-A-T2/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness4/4
Mobile3/4
Indexability3/3
N
nb.rsnb.rs

Народна библиотека Србије

Вести За кориснике За издаваче За библиотекаре Дигитални сервиси

Title Length25 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length64 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (11/13) — critical for accessibility and SEO

10 issues found

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Crawlability

Sitemap

Type: index

10 URLs

10 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

26/100
Needs Work
7 11

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AI & LLM Readiness

D46/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
7/25
Citation
12/25

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:3%
Words:1,122
Token eff.:Optimal

Structured Data

4 JSON-LD
Organization×1.1WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph2/3
Twitter Card1/3
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.
B
75/100
12
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
13/20
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
12/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
12/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
8/15
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.
28/100
E
335 mg
CO₂e / view
2.6 MB
Page Weight
30%
Cleaner Than
New Visitor
383 mg
vs
Returning (cached)
192 mg
Annual (10K/mo)
40.2 kg
Emission Segments
Data Center
75 mg
Network
81 mg
Device
180 mg
Resource Breakdown
JavaScript
471.6 KB
Images
1.2 MB
CSS
952.7 KB
HTML
47.3 KB
Green Hosting Not Verified
Academic Network of Serbia
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

42d

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/2

Valid From

12.03.2026

Valid Until

10.06.2026

Subject Alternative Names (2)

nb.rswww.nb.rs

SHA-256 Fingerprint

4F:CC:6C:66:04:8C:30:06:0C:D9:AA:75:71:C1:06:06:13:59:18:5B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-length
48098
content-type
text/html; charset=UTF-8
date
Wed, 29 Apr 2026 13:41:34 GMT
link
<https://nb.rs/wp-json/>; rel="https://api.w.org/", <https:/...
server
Apache/2.4.58 (Ubuntu)
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

73

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail.nb.rs

Domain Information

nb.rs

DNSSEC
Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner
CookieYes
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: CookieYes

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.
A
80/100
Mobile Friendly31 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...
Upgrade to view recommendations

Typography & Readability

Inter

WCAG Partial
48/100
Readability
/30
14/30

12px · LH 1.21

Hierarchy
/20
7/20
WCAG
/25
18/25

2.1:1 min contrast

Performance
/25
9/25

System fonts

Heading Font

Inter

Sans

Body Font

Inter

Sans12px

Contrast Ratio

2.1:1

1 issue

Reading Comfort

~51 CPL

Optimal (45–75)
14px
h3
24px
h4
12px
p
Major Sixth
Scale

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.21). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~51 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 2.1:1).

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

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

Buy on MyFonts

Color Palette

12 unique colors
12.38:1 AAA Light
#ffffff
Background· 43.4%
#303630
Text· 7.5%
#5e4e3f
Primary· 6.3%
#1d1a16
Secondary· 6.3%
#776f5e
Secondary· 6.3%
#b8a193
Secondary· 5.3%
#74110c
Accent· 4.9%
#d3c0ae
Secondary· 3.2%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
GDPR Cookie ConsentFree

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

30 Resources

20
Scripts
10
Styles
5
Async
0
Defer

Top Script Sources

nb.rs(17)googletagmanager.com(2)google-analytics.com(1)

Website Identity

Народна библиотека Србије

Народна библиотека Србије

Organization

Narodna biblioteka Srbije

nb.rs/
Location detected: 🇷🇸 Serbiavia tld
sr-RS

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Last analyzed: 29 Apr 2026 at 13:42

Historical Analysis & Change Tracking