14.4 sec in total
1.2 sec
12.6 sec
578 ms
Click here to check amazing Hoc24h content for Vietnam. Otherwise, check out these important facts you probably never knew about hoc24h.vn
Trang Web học trực tuyến số một Việt Nam. Luyện thi các môn: Toán học, Vật lý, Hóa học, Sinh học, Tiếng Anh, TOEIC, IELTS, Toán cao cấp
Visit hoc24h.vnWe analyzed Hoc24h.vn page load time and found that the first response time was 1.2 sec and then it took 13.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
hoc24h.vn performance score
name
value
score
weighting
Value13.7 s
0/100
10%
Value17.4 s
0/100
25%
Value36.6 s
0/100
10%
Value34,430 ms
0/100
30%
Value0.321
36/100
15%
Value59.1 s
0/100
10%
1150 ms
4185 ms
2195 ms
1913 ms
2633 ms
Our browser made a total of 100 requests to load all elements on the main page. We found that 21% of them (21 requests) were addressed to the original Hoc24h.vn, 55% (55 requests) were made to Stc.hoc24h.vn and 8% (8 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (4.2 sec) belongs to the original domain Hoc24h.vn.
Page size can be reduced by 1.3 MB (27%)
4.7 MB
3.4 MB
In fact, the total size of Hoc24h.vn main page is 4.7 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. 60% of websites need less resources to load. Images take 3.5 MB which makes up the majority of the site volume.
Potential reduce by 86.0 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 34.8 kB, which is 35% 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 86.0 kB or 86% of the original size.
Potential reduce by 371.6 kB
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. Obviously, Hoc24h needs image optimization as it can save up to 371.6 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 409.9 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 409.9 kB or 69% of the original size.
Potential reduce by 422.3 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. Hoc24h.vn needs all CSS files to be minified and compressed as it can save up to 422.3 kB or 77% of the original size.
Number of requests can be reduced by 42 (48%)
87
45
The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Hoc24h. 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 27 to 1 for CSS and as a result speed up the page load time.
hoc24h.vn
1150 ms
hoc24h.vn
4185 ms
jquery-3.2.1.min.js
2195 ms
bootstrap.min.js
1913 ms
bootstrap.css
2633 ms
master.css
1447 ms
theme.css
2418 ms
blog.css
1473 ms
va.css
1683 ms
notification.css
1717 ms
jquery-ui.css
2147 ms
jquery-ui.min.js
3696 ms
library.js
2375 ms
home.css
2386 ms
katex.min.css
64 ms
katex.min.js
81 ms
auto-render.min.js
81 ms
jquery.countdown.min.js
1725 ms
header.js
1911 ms
owl.carousel.min.js
2159 ms
jquery.jelect.js
1940 ms
custom.min.js
1951 ms
notification.js
2148 ms
notification_client.js
2151 ms
socket.io.js
2897 ms
angular.min.js
2666 ms
chat.js
2624 ms
chat.css
2387 ms
css
55 ms
font-awesome.min.css
1100 ms
style.css
1570 ms
slider-pro.css
1328 ms
isotope.css
1328 ms
validation-2.2.min.css
1360 ms
owl.carousel.css
1557 ms
owl.transitions.css
1564 ms
owl.theme.css
1591 ms
prettyPhoto.css
1597 ms
yamm.css
1692 ms
jquery.datetimepicker.css
1794 ms
main.css
1795 ms
sidebar.css
1801 ms
responsive.css
1829 ms
color.css
1832 ms
debugging.css
1937 ms
gtm.js
87 ms
tet.png
717 ms
ic-visa.svg
1148 ms
ic-mastercard.svg
1154 ms
ic-jcb.svg
1156 ms
ic-cash.svg
1151 ms
ic-internet-banking.svg
1158 ms
ic-fb.svg
1159 ms
ic-youtube.svg
1375 ms
KG-2023.png
2980 ms
KHAI-GIANG-KHOA-HOA-HOC-10-DANH-CHO-2K7.jpg
1844 ms
KHAI-GIANG-KHOA-HOA-HOC-11-DANH-CHO-2K6.jpg
2108 ms
slide-hotrohotline.png
2381 ms
Hoclive.png
1629 ms
Thay-Thanh.png
1639 ms
Trao-doi-hoc-tap-2.jpg
2343 ms
hotline.png
3748 ms
croppedImg_194131147.png
2310 ms
croppedImg_1736735902.png
2583 ms
croppedImg_896470078.png
3011 ms
croppedImg_203828378.png
2818 ms
trong_2.jpg
2853 ms
a1.jpg
3060 ms
PhiKhanh1.jpg
3057 ms
Nguyen%20Quang%20Dung.jpg
3090 ms
img14_NPYU.jpg
3210 ms
ajax-loader.gif
402 ms
Google-Play-Badge.png
402 ms
appstore-icon-mobile-retina-1-e1491494766646.png
497 ms
slogan.png
403 ms
search-ico.png
439 ms
fb-ico.png
401 ms
mess-ico.png
670 ms
dathongbao.png
1381 ms
600-li-xi.png
1616 ms
btn-huongdanhoc.png
607 ms
btn-huongdannaptien.png
606 ms
bg-search.jpg
2096 ms
bg-search-form.png
846 ms
search-hotline.png
853 ms
bg-store.jpg
1792 ms
KFOmCnqEu92Fr1Mu4mxPKTU1Kg.ttf
231 ms
KFOlCnqEu92Fr1MmSU5fBBc9AMP6lQ.ttf
267 ms
KFOlCnqEu92Fr1MmWUlfBBc9AMP6lQ.ttf
272 ms
KFOlCnqEu92Fr1MmYUtfBBc9AMP6lQ.ttf
270 ms
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
10 ms
memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVcUwaEQXjM.ttf
267 ms
memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVcUwaEQXjM.ttf
262 ms
memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVcUwaEQXjM.ttf
261 ms
memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVcUwaEQXjM.ttf
261 ms
fontawesome-webfont.woff
1209 ms
analytics.js
240 ms
time.php
2897 ms
collect
12 ms
collect
28 ms
hoc24h.vn accessibility score
ARIA
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.
Impact
Issue
ARIA input fields do not have accessible names
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
ARIA IDs are not unique
Names and labels
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.
Impact
Issue
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
hoc24h.vn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Requests the notification permission on page load
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
hoc24h.vn SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
robots.txt is not valid
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
Mobile Friendly
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/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
VI
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Hoc24h.vn can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Hoc24h.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.
hoc24h.vn
Open Graph data is detected on the main page of Hoc24h. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: