5.5 sec in total
Visit onlinejazyky.cz now to see the best up-to-date ONLINE Jazyky content for Czech Republic and also check out these interesting facts you probably never knew about onlinejazyky.cz
Online jazykov? kurzy pro za??te?n?ky, pokro?il? a r?zn? profese. Atraktivn?, z?bavn? a jednoduch? angli?tina, francouz?tina, n?m?ina a ?pan?l?tina.Visit onlinejazyky.cz
We analyzed Onlinejazyky.cz page load time and found that the first response time was 443 ms and then it took 5.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
onlinejazyky.cz performance score
Our browser made a total of 93 requests to load all elements on the main page. We found that 70% of them (65 requests) were addressed to the original Onlinejazyky.cz, 12% (11 requests) were made to Shared.optimato.cz and 2% (2 requests) were made to Googleadservices.com. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Onlinejazyky.cz.
Page size can be reduced by 1.0 MB (33%)
In fact, the total size of Onlinejazyky.cz main page is 3.1 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. 55% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.
Potential reduce by 22.2 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 3.9 kB, which is 13% 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 22.2 kB or 74% of the original size.
Potential reduce by 225.6 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, ONLINE Jazyky needs image optimization as it can save up to 225.6 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 583.6 kB
Potential reduce by 211.1 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. Onlinejazyky.cz needs all CSS files to be minified and compressed as it can save up to 211.1 kB or 83% of the original size.
Number of requests can be reduced by 48 (55%)
onlinejazyky.cz accessibility score
These are opportunities to improve the legibility of your content.
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.
<html> element does not have a [lang] attribute
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.
Links do not have a discernible name
These items highlight common accessibility best practices.
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
onlinejazyky.cz best practices score
Trust and Safety
Does not use HTTPS
Ensure CSP is effective against XSS attacks
Displays images with incorrect aspect ratio
onlinejazyky.cz SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
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 Onlinejazyky.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech 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 Onlinejazyky.cz main page’s claimed encoding is windows-1250. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
Open Graph data is detected on the main page of ONLINE Jazyky. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: