5.5 sec in total
443 ms
4.7 sec
416 ms
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.czWe 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 75% of websites can load faster.
onlinejazyky.cz performance score
name
value
score
weighting
Value4.3 s
18/100
10%
Value11.6 s
0/100
25%
Value7.5 s
26/100
10%
Value1,280 ms
18/100
30%
Value0.018
100/100
15%
Value14.4 s
9/100
10%
443 ms
550 ms
339 ms
671 ms
126 ms
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%)
3.2 MB
2.1 MB
In fact, the total size of Onlinejazyky.cz main page is 3.2 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. 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 583.4 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 583.4 kB or 66% of the original size.
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%)
87
39
The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ONLINE Jazyky. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and from 16 to 1 for CSS and as a result speed up the page load time.
onlinejazyky.cz
443 ms
onlinejazyky.cz
550 ms
www.onlinejazyky.cz
339 ms
www.onlinejazyky.cz
671 ms
bootstrap.min.css
126 ms
webfont.css
260 ms
elusive-webfont.css
380 ms
jquery-ui-1.10.3.custom.min.css
382 ms
main.css
389 ms
ico.css
375 ms
magnific-popup.css
381 ms
popover.css
376 ms
feature.css
492 ms
blog.css
511 ms
jquery-1.10.2.min.js
739 ms
highslide.js
697 ms
highslide_conf.js
593 ms
highslide.css
601 ms
styles.php
514 ms
dyn.css
513 ms
jsfx.js
599 ms
efekty.js
628 ms
jquery.forms.js
516 ms
slidehide.js
639 ms
ruzne.js
705 ms
eshop.js
711 ms
jquery-ui-1.10.3.custom.min.js
720 ms
jquery.scrollTo-min.js
635 ms
jquery.magnific-popup.min.js
639 ms
OnlineJazykyPage.js
640 ms
optimato.js
636 ms
jquery.ui.touch-punch.js
713 ms
jplayer.blue.monday.css
782 ms
jquery.jplayer.min.js
783 ms
jplayer.playlist.min.js
782 ms
jquery.jplayer.inspector.js
786 ms
bootstrap.min.js
834 ms
script.js
779 ms
tracking.js
886 ms
conversion.js
34 ms
loader.js
998 ms
stranka-0.jpg
1295 ms
logo@2x.png
242 ms
menu_more@2x.png
122 ms
help-line@2x.png
477 ms
ico-chevron-down@2x.png
133 ms
block-back-bottom@2x.png
119 ms
screens.png
800 ms
map-main@2x.png
746 ms
map-en@2x.png
373 ms
map-de@2x.png
358 ms
map-fr@2x.png
594 ms
map-es@2x.png
494 ms
map-ru@2x.png
596 ms
icon-en@2x.png
616 ms
icon-de@2x.png
716 ms
icon-fr@2x.png
715 ms
icon-es@2x.png
739 ms
icon-ru@2x.png
836 ms
akce.jpg
1188 ms
icon-globus@2x.png
978 ms
icon-vyuka@2x.png
866 ms
icon-garance@2x.png
914 ms
browser.png
1071 ms
partners@2x.png
994 ms
ProximaNova-Reg-webfont.woff
1112 ms
ProximaNova-Sbold-webfont.woff
1309 ms
Elusive-Icons.woff
1253 ms
ProximaNova-Bold-webfont.woff
1283 ms
fontawesome-webfont.woff
1253 ms
logo2@2x.png
1279 ms
footer-banner@2x.jpg
1790 ms
icon-facebook@2x.png
1339 ms
icon-twitter@2x.png
1364 ms
icon-googleplus@2x.png
1402 ms
icon-linkedin@2x.png
1402 ms
ico-chevron-up@2x.png
1425 ms
68 ms
gtm.js
131 ms
dot.asp
522 ms
styles.css
125 ms
39 ms
analytics.js
55 ms
conversion_async.js
19 ms
retargeting.js
458 ms
12 ms
37 ms
collect
12 ms
collect
58 ms
retargeting
113 ms
smartchat-2.1.1.min.css
172 ms
smartchat-2.1.1.min.js
298 ms
loading.gif
415 ms
onlinejazyky.cz 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.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<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.
Impact
Issue
Links do not have a discernible name
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.
onlinejazyky.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
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
onlinejazyky.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
CS
N/A
WINDOWS-1250
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.
onlinejazyky.cz
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: