4.4 sec in total
341 ms
3.6 sec
415 ms
Visit koloweb.cz now to see the best up-to-date Koloweb content and also check out these interesting facts you probably never knew about koloweb.cz
Obsah nedodan
Visit koloweb.czWe analyzed Koloweb.cz page load time and found that the first response time was 341 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.
koloweb.cz performance score
name
value
score
weighting
Value4.3 s
19/100
10%
Value4.9 s
28/100
25%
Value6.2 s
44/100
10%
Value20 ms
100/100
30%
Value0.028
100/100
15%
Value4.6 s
81/100
10%
341 ms
32 ms
238 ms
929 ms
1053 ms
Our browser made a total of 82 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Koloweb.cz, 10% (8 requests) were made to Miniaplikace.blueboard.cz and 7% (6 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Koloweb.wz.cz.
Page size can be reduced by 333.8 kB (19%)
1.8 MB
1.5 MB
In fact, the total size of Koloweb.cz main page is 1.8 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. 50% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.
Potential reduce by 37.1 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 5.9 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 37.1 kB or 82% of the original size.
Potential reduce by 166.0 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, Koloweb needs image optimization as it can save up to 166.0 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 130.0 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 130.0 kB or 60% of the original size.
Potential reduce by 733 B
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. Koloweb.cz needs all CSS files to be minified and compressed as it can save up to 733 B or 67% of the original size.
Number of requests can be reduced by 18 (24%)
74
56
The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Koloweb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.
koloweb.wz.cz
341 ms
ga.js
32 ms
anketa_0.php
238 ms
kalendar.php
929 ms
cyklistika2.jpg
1053 ms
counter_1.php
463 ms
omonitor.php
528 ms
code
370 ms
banner_pyro_ohnostroje.png
730 ms
nudle03.gif
299 ms
adsbygoogle.js
18 ms
main7.gif
309 ms
ggauche1.gif
210 ms
gauche2.gif
207 ms
gauche3.gif
209 ms
kniha.gif
211 ms
fzari901.jpg
215 ms
droit1.gif
407 ms
rssm.gif
415 ms
droit2.gif
416 ms
droit3.gif
415 ms
droit5.gif
419 ms
droit4.gif
502 ms
ikon_ani.gif
619 ms
cs_ikona81x31.gif
616 ms
koloweb-mini.gif
618 ms
obalka2.gif
623 ms
luh1.jpg
821 ms
zsumava2.jpg
1108 ms
rychory.jpg
1109 ms
vysm1.jpg
1037 ms
vysm2.jpg
1028 ms
vysm3.jpg
1162 ms
kralicky_sneznik_1.jpg
1273 ms
smrk2.jpg
1545 ms
mil4.jpg
1446 ms
mil5.jpg
1535 ms
mil6.jpg
1547 ms
kh10.jpg
1768 ms
kh3.jpg
1763 ms
kh2.jpg
1953 ms
libochovice1.jpg
2045 ms
libochovice2.jpg
2058 ms
libochovice3.jpg
2071 ms
kunetickahora_i.jpg
2183 ms
chrudim_i.jpg
2173 ms
bannerb.png
791 ms
lichnice_i.jpg
2356 ms
__utm.gif
18 ms
novehrady_i.jpg
2252 ms
baner-fotogalerie.gif
2164 ms
mrija7.jpg
2174 ms
hadanka9.jpg
2384 ms
hadanka10-i.jpg
2297 ms
anketa_0.php
242 ms
counter_1.php
238 ms
counter_1.php
229 ms
0141.gif
232 ms
0142.gif
237 ms
0143.gif
236 ms
omonitor.php
235 ms
hit
238 ms
nudle03.gif
203 ms
ad.cgi
295 ms
ca-pub-1913303753024297.js
45 ms
zrt_lookup.html
47 ms
show_ads_impl.js
58 ms
ads
259 ms
c_kalendar.css
148 ms
sun.gif
149 ms
osd.js
3 ms
m_js_controller.js
26 ms
abg.js
36 ms
favicon
82 ms
googlelogo_color_112x36dp.png
81 ms
nessie_icon_thin_arrow_big_white.png
42 ms
s
34 ms
x_button_blue2.png
39 ms
Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js
4 ms
activeview
13 ms
counter_1.php
327 ms
ui
25 ms
koloweb.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
Image elements do not have [alt] attributes
Links do not have a discernible name
koloweb.cz 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
koloweb.cz 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
CS
N/A
WINDOWS-1250
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Koloweb.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 Koloweb.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.
koloweb.cz
Open Graph description is not detected on the main page of Koloweb. 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: