10.9 sec in total
361 ms
8.9 sec
1.6 sec
Welcome to englishbooks.cz homepage info - get ready to check English Books best content for Czech Republic right away, or after learning these important things about englishbooks.cz
Eshop Englishbooks.cz. Učebnice a knihy v angličtině. Více než 300 odběrných míst, většina titulů skladem, nízká cena dopravy. 10 let na trhu. Materiály pro učitele zdarma.
Visit englishbooks.czWe analyzed Englishbooks.cz page load time and found that the first response time was 361 ms and then it took 10.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
englishbooks.cz performance score
name
value
score
weighting
Value4.6 s
14/100
10%
Value8.3 s
2/100
25%
Value9.3 s
12/100
10%
Value310 ms
77/100
30%
Value0.315
37/100
15%
Value8.9 s
35/100
10%
361 ms
1834 ms
228 ms
237 ms
475 ms
Our browser made a total of 163 requests to load all elements on the main page. We found that 88% of them (143 requests) were addressed to the original Englishbooks.cz, 6% (10 requests) were made to Static.xx.fbcdn.net and 3% (5 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Englishbooks.cz.
Page size can be reduced by 488.4 kB (45%)
1.1 MB
609.0 kB
In fact, the total size of Englishbooks.cz main page is 1.1 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. 35% of websites need less resources to load. Images take 504.3 kB which makes up the majority of the site volume.
Potential reduce by 144.4 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 29.2 kB, which is 18% 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 144.4 kB or 89% of the original size.
Potential reduce by 39.2 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. English Books images are well optimized though.
Potential reduce by 253.5 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 253.5 kB or 69% of the original size.
Potential reduce by 51.2 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. Englishbooks.cz needs all CSS files to be minified and compressed as it can save up to 51.2 kB or 83% of the original size.
Number of requests can be reduced by 50 (31%)
160
110
The browser has sent 160 CSS, Javascripts, AJAX and image requests in order to completely render the main page of English Books. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.
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englishbooks.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.
Impact
Issue
Buttons do not have an accessible name
Form elements do not have associated labels
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.
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.
englishbooks.cz 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
Browser errors were logged to the console
englishbooks.cz SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Englishbooks.cz can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Czech language. Our system also found out that Englishbooks.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.
englishbooks.cz
Open Graph description is not detected on the main page of English Books. 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: