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Welcome to cas.cz homepage info - get ready to check Cas best content for Czech Republic right away, or after learning these important things about cas.cz
Akademie věd České republiky, veřejná neuniverzitní výzkumná instituce.Visit cas.cz
We analyzed Cas.cz page load time and found that the first response time was 728 ms and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
cas.cz performance score
Our browser made a total of 86 requests to load all elements on the main page. We found that 83% of them (71 requests) were addressed to the original Cas.cz, 2% (2 requests) were made to Google-analytics.com and 2% (2 requests) were made to 0du-ufbb06e26-s1456754871-i5127.am.dotnxdomain.net. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Cas.cz.
Page size can be reduced by 339.6 kB (11%)
In fact, the total size of Cas.cz main page is 3.0 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. 35% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.
Potential reduce by 46.8 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 46.8 kB or 76% of the original size.
Potential reduce by 178.2 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. Cas images are well optimized though.
Potential reduce by 91.7 kB
Potential reduce by 22.9 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. Cas.cz needs all CSS files to be minified and compressed as it can save up to 22.9 kB or 84% of the original size.
Number of requests can be reduced by 29 (34%)
cas.cz 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.
Buttons do not have an accessible name
Links do not have a discernible name
cas.cz best practices score
Trust and Safety
Does not use HTTPS
Ensure CSP is effective against XSS attacks
Serves images with low resolution
Browser errors were logged to the console
Page has valid source maps
cas.cz SEO score
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/).
Document uses legible font sizes
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cas.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Cas.cz 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.
Open Graph description is not detected on the main page of Cas. 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: