Access cntt.vn. 404 Error

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

5/100

10%

LCP (Largest Contentful Paint)

Value15.2 s

0/100

25%

SI (Speed Index)

Value10.0 s

9/100

10%

TBT (Total Blocking Time)

Value540 ms

54/100

30%

CLS (Cumulative Layout Shift)

Value0.183

66/100

15%

TTI (Time to Interactive)

Value12.1 s

16/100

10%

cntt.vn

1135 ms

matbao.net

480 ms

www.matbao.net

469 ms

www.matbao.net

2932 ms

ddsmoothmenu.css

699 ms

Our browser made a total of 146 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Cntt.vn, 82% (120 requests) were made to Matbao.net and 6% (9 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (2.9 sec) relates to the external source Matbao.net.

Content Size

3.4 MB

After Optimization

2.2 MB

In fact, the total size of Cntt.vn main page is 3.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 50% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 115.7 kB

Original 140.9 kB
After minification 119.4 kB
After compression 25.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 21.5 kB, which is 15% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 115.7 kB or 82% of the original size.

Image Optimization

-8%

Potential reduce by 164.4 kB

Original 2.2 MB
After minification 2.0 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Cntt images are well optimized though.

JavaScript Optimization

-79%

Potential reduce by 692.1 kB

Original 879.7 kB
After minification 635.7 kB
After compression 187.6 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 692.1 kB or 79% of the original size.

CSS Optimization

-86%

Potential reduce by 166.0 kB

Original 192.3 kB
After minification 126.1 kB
After compression 26.3 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Cntt.vn needs all CSS files to be minified and compressed as it can save up to 166.0 kB or 86% of the original size.

Requests Now

132

After Optimization

The browser has sent 132 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cntt. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

N/A
Language Claimed

VI
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cntt.vn can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Vietnamese. Our system also found out that Cntt.vn main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

cntt.vn

Open Graph description is not detected on the main page of Cntt. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks:

Report Summary

Performance

Accessibility

Best Practices

SEO

404 Error

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

cntt.vn

matbao.net

www.matbao.net

www.matbao.net

ddsmoothmenu.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

cntt.vn

matbao.net

www.matbao.net

www.matbao.net

ddsmoothmenu.css

skinned-select.css

main.css

main2015.css

custom.css

chat.css

control.css

json2.js

jquery-1.7.2.min.js

jquery-ui.min.js

jquery.skinned-select.js

main.js

Ajax.js

MBChat.js

jquery.fancybox.css

jquery.fancybox.js

WebResource.axd

ScriptResource.axd

ScriptResource.axd

coin-slider.js

coin-slider-styles.css

DMCABadgeHelper.min.js

gmogs_image_90-35_en_white.js

conversion.js

fbevents.js

analytics.js

Install-WPH.png

_dmca_premi_badge_4.png

gmogs_image_90-35_en_white.png

arrow-account.png

logo.png

saleoff_bangigatenmien.gif

click_banner_right.png

hinhtrong_banner_T3_new.png

pic-domain-info.jpg

pic-domain-org.jpg

pic-domain-net.jpg

pic-note.jpg

pic-domain-com.jpg