15.7 sec in total
1.7 sec
13.8 sec
223 ms
Welcome to 51zzt.com homepage info - get ready to check 51 Zzt best content right away, or after learning these important things about 51zzt.com
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Visit 51zzt.comWe analyzed 51zzt.com page load time and found that the first response time was 1.7 sec and then it took 14 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
51zzt.com performance score
name
value
score
weighting
Value3.3 s
41/100
10%
Value13.5 s
0/100
25%
Value6.5 s
38/100
10%
Value100 ms
98/100
30%
Value0.004
100/100
15%
Value8.5 s
38/100
10%
1686 ms
437 ms
1422 ms
695 ms
781 ms
Our browser made a total of 43 requests to load all elements on the main page. We found that 81% of them (35 requests) were addressed to the original 51zzt.com, 19% (8 requests) were made to V001.2799x.cn. The less responsive or slowest element that took the longest time to load (11.3 sec) relates to the external source V001.2799x.cn.
Page size can be reduced by 161.6 kB (19%)
868.9 kB
707.2 kB
In fact, the total size of 51zzt.com main page is 868.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 699.8 kB which makes up the majority of the site volume.
Potential reduce by 32.6 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 32.6 kB or 84% of the original size.
Potential reduce by 36.5 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. 51 Zzt images are well optimized though.
Potential reduce by 85.3 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 85.3 kB or 71% of the original size.
Potential reduce by 7.2 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. 51zzt.com needs all CSS files to be minified and compressed as it can save up to 7.2 kB or 72% of the original size.
Number of requests can be reduced by 19 (46%)
41
22
The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Zzt. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.
51zzt.com
1686 ms
common.css
437 ms
base.js
1422 ms
common.js
695 ms
form.js
781 ms
blockui.js
815 ms
advsheadlb.css
653 ms
advsheadlb.js
839 ms
topmenu.css
873 ms
menu.css
912 ms
tempclass.css
793 ms
newslist.css
595 ms
templistall.css
615 ms
F.css
574 ms
7102_s.jpg
11252 ms
7101_s.jpg
7449 ms
7100_s.jpg
2856 ms
3177_s.jpg
2886 ms
3175_s.jpg
7222 ms
3178_s.jpg
4262 ms
3176_s.jpg
6545 ms
3179_s.jpg
5020 ms
6.gif
528 ms
1247712353.jpg
2148 ms
1247712359.jpg
2260 ms
1247712380.jpg
2110 ms
1247712387.jpg
1873 ms
1454288344.png
324 ms
submit.png
704 ms
b7.gif
898 ms
b5.gif
1015 ms
b8.gif
1145 ms
1247710831.jpg
1373 ms
menu.jpg
1795 ms
line.jpg
1802 ms
diy.jpg
3618 ms
titlebg.jpg
2068 ms
li.gif
2115 ms
pwbutton.gif
2320 ms
titlebg.jpg
2313 ms
li.gif
2323 ms
tpbg.jpg
2337 ms
top.png
2410 ms
51zzt.com accessibility score
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.
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
51zzt.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
51zzt.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51zzt.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 51zzt.com 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.
51zzt.com
Open Graph description is not detected on the main page of 51 Zzt. 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: