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nlv.gov.vn

https://nlv.gov.vn· First analyzed 22 May 2026· Updated 22 May 2026
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nlv.gov.vn
Desktop screenshot of nlv.gov.vn
Mobile screenshot of nlv.gov.vn
Mobile

Sponsored

Hosting Provider

FPT-STATICIP

IP Address

42.112.40.163

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS18403

Server

Apache

Nameservers

ns1.pavietnam.vn.ns2.pavietnam.vn.

Performance

75

Core Web Vitals

Weight

First Contentful Paint
3.5 s10%
Speed Index
4.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.5 MB
86 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Joomla!

Technology Stack

5 Technologies Detected

Libraries

1
jQueryv1.3.2

UI Components

1
Fancybox

Analytics

1
Facebook Pixel

Web Servers

1
Apachev2.4.6

Languages

1
PHPv5.4.16

SEO Analysis

D52/100
13
11
1
Meta Tags9/15
Content11/12
Headings5/8
Technical11/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
N
nlv.gov.vnnlv.gov.vn

THƯ VIỆN QUỐC GIA VIỆT NAM

THƯ VIỆN QUỐC GIA VIỆT NAM (NATIONAL LIBRARY OF VIETNAM)SỐ: 31 - PHỐ TRÀNG THI - QUẬN HOÀN KIẾM - HÀ NỘIĐT: 04-38255397, FAX: 04-38253357E-MAIL: info@nlv.gov.vn

Title Length26 chars

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

Description Length160 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

15 rules

Local SEO

Local Search Readiness

5/100
Poor
2 13 2

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

Sponsored

AI & LLM Readiness

F39/100
Bot Access
20/25
Machine Read.
9/25
Schema Data
0/25
Citation
10/25

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:2,621
Token eff.:Optimal
Sections/1K:3.1

Structured Data

No Schema

Citation Readiness

Opening Summary148w
Descriptive Headingsavg 3.1w
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...
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.
B
70/100
9
Passed
4
Critical
0
Warnings
Images & Alt Text
15/20
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
13/15
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...
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.
18/100
E
319 mg
CO₂e / view
2.5 MB
Page Weight
30%
Cleaner Than
New Visitor
364 mg
vs
Returning (cached)
182 mg
Annual (10K/mo)
38.2 kg
Emission Segments
Data Center
71 mg
Network
77 mg
Device
171 mg
Resource Breakdown
JavaScript
180.7 KB
Images
2.2 MB
CSS
163.8 KB
HTML
15.3 KB
Other
3.1 KB
Green Hosting Not Verified
FPT-STATICIP
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

79d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

11.05.2026

Valid Until

09.08.2026

Subject Alternative Names (2)

nlv.gov.vnwww.nlv.gov.vn

SHA-256 Fingerprint

20:B8:02:38:29:A1:97:09:AC:9D:04:45:23:1E:5A:F2:BE:07:17:27...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
⚪ Custom(post-check=0, pre-check=0)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Fri, 22 May 2026 08:53:58 GMT
expires
Mon, 1 Jan 2001 00:00:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

mail.nlv.gov.vn

Domain Information

nlv.gov.vn

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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.
F
26/100
Not 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.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Tahoma

WCAG AA
60/100
Readability
/30
17/30

13px · LH 1.50

Hierarchy
/20
10/20

1.67x ratio

WCAG
/25
19/25

6.23:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Tahoma

Sans22px

Body Font

Tahoma

Sans13px

Contrast Ratio

6.23:1

WCAG AA (≥4.5:1)

Reading Comfort

~61 CPL

Optimal (45–75)
22px
h1
14px
h3
11px
h4
13px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~61 chars/line (ideal 45–75 CPL).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.2:1).

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

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

Buy on MyFontsFlesch 63

Color Palette

11 unique colors
3.18:1 AA Large Light
#ffffff
Background· 41.1%
#8a9291
Other· 7.5%
#8b0101
Primary· 10.8%
#e0ddd2
Secondary· 6.6%
#335e83
Secondary· 6.1%
#cdb9b1
Secondary· 5.6%
#fcf1c1
Accent· 4.6%
#a34138
Secondary· 3.7%

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

Sponsored

Scripts & Styles

20 Resources

10
Scripts
10
Styles
2
Async
0
Defer

Top Script Sources

nlv.gov.vn(6)connect.facebook.net(2)local(2)

Website Identity

nlv.gov.vn

Location detected: 🇻🇳 Vietnamvia tld
en-gb

Social Profiles

Facebook

Sponsored

Last analyzed: 22 May 2026 at 08:53

Historical Analysis & Change Tracking