3.7 sec in total
811 ms
2.5 sec
361 ms
Click here to check amazing OP VK content for Czech Republic. Otherwise, check out these important facts you probably never knew about op-vk.cz
OP VK - Operační program Vzdělávání pro konkurenceschopnost
Visit op-vk.czWe analyzed Op-vk.cz page load time and found that the first response time was 811 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
op-vk.cz performance score
name
value
score
weighting
Value6.9 s
1/100
10%
Value8.0 s
2/100
25%
Value9.2 s
13/100
10%
Value310 ms
77/100
30%
Value0
100/100
15%
Value10.4 s
24/100
10%
811 ms
104 ms
200 ms
198 ms
312 ms
Our browser made a total of 63 requests to load all elements on the main page. We found that 57% of them (36 requests) were addressed to the original Op-vk.cz, 17% (11 requests) were made to Opvk.as4u.cz and 11% (7 requests) were made to Translate.googleapis.com. The less responsive or slowest element that took the longest time to load (868 ms) relates to the external source Opvk.as4u.cz.
Page size can be reduced by 378.0 kB (62%)
606.8 kB
228.8 kB
In fact, the total size of Op-vk.cz main page is 606.8 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. 50% of websites need less resources to load. Javascripts take 463.0 kB which makes up the majority of the site volume.
Potential reduce by 45.7 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 45.7 kB or 78% of the original size.
Potential reduce by 3.6 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, OP VK needs image optimization as it can save up to 3.6 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 280.4 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 280.4 kB or 61% of the original size.
Potential reduce by 48.3 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. Op-vk.cz needs all CSS files to be minified and compressed as it can save up to 48.3 kB or 79% of the original size.
Number of requests can be reduced by 33 (53%)
62
29
The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of OP VK. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
www.op-vk.cz
811 ms
as4urs1.css
104 ms
opvk.css
200 ms
gallery.css
198 ms
jquery.js
312 ms
jquery-ui.js
418 ms
nove_okno_obrazku.js
207 ms
redakce.js
207 ms
ajax_load.js
293 ms
gallery4u.js
297 ms
as4u_popup.js
309 ms
opvk.js
307 ms
tooltip.js
390 ms
as4u_roller.js
394 ms
element.js
34 ms
465.jpg
868 ms
print.css
134 ms
all.js
48 ms
464.png
421 ms
imager.php
419 ms
12.png
416 ms
461.png
417 ms
13.png
415 ms
565.png
543 ms
5.png
550 ms
xls.gif
154 ms
510.png
536 ms
imager.php
533 ms
35.jpg
736 ms
68.png
148 ms
69.png
149 ms
680_460_130_5.jpg
147 ms
545_460_130_5.jpg
147 ms
757_460_130_5.jpg
182 ms
750_460_130_5.png
628 ms
760_460_130_5.jpg
263 ms
684_460_130_5.jpg
262 ms
video_thumb.php
445 ms
video_thumb.php
459 ms
video_thumb.php
396 ms
video_thumb.php
393 ms
518_170_56.jpg
392 ms
568_140_56.jpg
518 ms
526_170_56.jpg
527 ms
692_54_45.jpg
526 ms
753_170_48.jpg
557 ms
pdf.gif
558 ms
imager.php
637 ms
loading.gif
627 ms
translateelement.css
127 ms
main.js
139 ms
176 ms
xd_arbiter.php
34 ms
xd_arbiter.php
43 ms
element_main.js
46 ms
translate_24dp.png
36 ms
l
40 ms
googlelogo_color_42x16dp.png
31 ms
googlelogo_color_68x28dp.png
9 ms
cleardot.gif
35 ms
te_ctrl3.gif
13 ms
loading.gif
21 ms
te_bk.gif
11 ms
op-vk.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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
Form elements do not have associated labels
op-vk.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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
op-vk.cz SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Op-vk.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Op-vk.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.
op-vk.cz
Open Graph description is not detected on the main page of OP VK. 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: