4.4 sec in total
350 ms
3.8 sec
214 ms
Visit o2.sk now to see the best up-to-date O2 content for Slovakia and also check out these interesting facts you probably never knew about o2.sk
Férový operátor O2 Slovensko. Vyberte si z ponuky výhodných volaní, dátových balíčkov, mobilných telefónov a tabletov v O2 E-shope. Kontrola spotreby, faktúry, dobíjanie kreditu a aktivácia balíčkov v...
Visit o2.skWe analyzed O2.sk page load time and found that the first response time was 350 ms and then it took 4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
o2.sk performance score
name
value
score
weighting
Value6.7 s
2/100
10%
Value16.1 s
0/100
25%
Value13.1 s
2/100
10%
Value2,750 ms
3/100
30%
Value0.012
100/100
15%
Value19.9 s
2/100
10%
350 ms
745 ms
852 ms
746 ms
1010 ms
Our browser made a total of 107 requests to load all elements on the main page. We found that 24% of them (26 requests) were addressed to the original O2.sk, 29% (31 requests) were made to O2static.sk and 4% (4 requests) were made to Sk.hit.gemius.pl. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source O2static.sk.
Page size can be reduced by 443.9 kB (48%)
924.9 kB
481.0 kB
In fact, the total size of O2.sk main page is 924.9 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. 65% of websites need less resources to load. Javascripts take 533.5 kB which makes up the majority of the site volume.
Potential reduce by 83.0 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 83.0 kB or 79% of the original size.
Potential reduce by 2.2 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. O2 images are well optimized though.
Potential reduce by 358.7 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 358.7 kB or 67% of the original size.
Number of requests can be reduced by 66 (65%)
101
35
The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of O2. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
o2.sk
350 ms
www.o2.sk
745 ms
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o2.sk accessibility score
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
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
Image elements do not have [alt] attributes
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.
o2.sk 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
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
o2.sk SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
SK
SK
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise O2.sk can be misinterpreted by Google and other search engines. Our service has detected that Slovak is used on the page, and it matches the claimed language. Our system also found out that O2.sk main page’s claimed encoding is iso-8859-1. 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.
o2.sk
Open Graph description is not detected on the main page of O2. 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: