1.6 sec in total
388 ms
1.1 sec
116 ms
Welcome to klasa.pl homepage info - get ready to check Klasa best content right away, or after learning these important things about klasa.pl
Klasa - piosenka, matematyka, biologia, język polski dla dzieci - zadania, odpowiedzi, powiedzenia, teksty, midi, karaoke
Visit klasa.plWe analyzed Klasa.pl page load time and found that the first response time was 388 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
klasa.pl performance score
name
value
score
weighting
Value4.8 s
12/100
10%
Value13.0 s
0/100
25%
Value10.2 s
9/100
10%
Value160 ms
94/100
30%
Value0.332
35/100
15%
Value10.2 s
26/100
10%
388 ms
6 ms
144 ms
387 ms
541 ms
Our browser made a total of 29 requests to load all elements on the main page. We found that 38% of them (11 requests) were addressed to the original Klasa.pl, 17% (5 requests) were made to Pagead2.googlesyndication.com and 17% (5 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (746 ms) belongs to the original domain Klasa.pl.
Page size can be reduced by 20.3 kB (13%)
150.9 kB
130.6 kB
In fact, the total size of Klasa.pl main page is 150.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 30% of websites need less resources to load. Images take 95.4 kB which makes up the majority of the site volume.
Potential reduce by 5.9 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 5.9 kB or 77% of the original size.
Potential reduce by 4.5 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. Klasa images are well optimized though.
Potential reduce by 9.9 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 9.9 kB or 21% of the original size.
Number of requests can be reduced by 7 (26%)
27
20
The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Klasa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.
klasa.pl
388 ms
show_ads.js
6 ms
motyl_green.jpg
144 ms
nk_title.jpg
387 ms
wizytowka1_muzyka.jpg
541 ms
biologia.jpg
526 ms
matematyka.jpg
533 ms
polski.jpg
532 ms
leaf_green.jpg
270 ms
gnom_teczka.jpg
644 ms
nk_dzieci_title.jpg
500 ms
cdn.jpg
746 ms
ca-pub-4670326997148114.js
118 ms
zrt_lookup.html
64 ms
show_ads_impl.js
63 ms
ga.js
27 ms
__utm.gif
53 ms
ads
129 ms
osd.js
16 ms
ads
124 ms
ads
126 ms
m_js_controller.js
26 ms
abg.js
40 ms
favicon
51 ms
googlelogo_color_112x36dp.png
38 ms
nessie_icon_tiamat_white.png
34 ms
s
19 ms
x_button_blue2.png
9 ms
Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js
3 ms
klasa.pl 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
Image elements do not have [alt] attributes
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.
klasa.pl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Issues were logged in the Issues panel in Chrome Devtools
klasa.pl SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
PL
PL
ISO-8859-2
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Klasa.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it matches the claimed language. Our system also found out that Klasa.pl main page’s claimed encoding is iso-8859-2. 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.
klasa.pl
Open Graph description is not detected on the main page of Klasa. 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: