3.5 sec in total
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Visit chemistry.universalclass.comWe analyzed Chemistry.universalclass.com page load time and found that the first response time was 89 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
chemistry.universalclass.com performance score
name
value
score
weighting
Value2.6 s
64/100
10%
Value6.5 s
9/100
25%
Value5.8 s
50/100
10%
Value2,550 ms
4/100
30%
Value0.001
100/100
15%
Value7.4 s
49/100
10%
89 ms
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302 ms
363 ms
Our browser made a total of 44 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Chemistry.universalclass.com, 91% (40 requests) were made to Cdn.4uc.org and 2% (1 request) were made to Universalclass.com. The less responsive or slowest element that took the longest time to load (720 ms) relates to the external source Cdn.4uc.org.
Page size can be reduced by 117.2 kB (9%)
1.2 MB
1.1 MB
In fact, the total size of Chemistry.universalclass.com main page is 1.2 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 1.1 MB which makes up the majority of the site volume.
Potential reduce by 113.1 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 113.1 kB or 81% of the original size.
Potential reduce by 4.1 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. Chemistry Universal Class images are well optimized though.
Potential reduce by 11 B
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. This website has mostly compressed JavaScripts.
Potential reduce by 0 B
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. Chemistry.universalclass.com has all CSS files already compressed.
We found no issues to fix!
40
40
The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemistry Universal Class. According to our analytics all requests are already optimized.
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chemistry.universalclass.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
chemistry.universalclass.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
chemistry.universalclass.com SEO score
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemistry.universalclass.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Chemistry.universalclass.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.
chemistry.universalclass.com
Open Graph data is detected on the main page of Chemistry Universal Class. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: