6.8 sec in total
980 ms
5.5 sec
284 ms
Click here to check amazing ALERA content for Czech Republic. Otherwise, check out these important facts you probably never knew about alera.cz
Široká nabídka veškerých kancelářských potřeb s dopravou "až na stůl" do 24 hodin od objednání, to je Alera.cz.
Visit alera.czWe analyzed Alera.cz page load time and found that the first response time was 980 ms and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
alera.cz performance score
name
value
score
weighting
Value9.4 s
0/100
10%
Value10.8 s
0/100
25%
Value9.4 s
12/100
10%
Value340 ms
75/100
30%
Value1.114
1/100
15%
Value11.0 s
21/100
10%
980 ms
616 ms
620 ms
399 ms
514 ms
Our browser made a total of 64 requests to load all elements on the main page. We found that 91% of them (58 requests) were addressed to the original Alera.cz, 3% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (3.9 sec) belongs to the original domain Alera.cz.
Page size can be reduced by 382.6 kB (47%)
806.2 kB
423.6 kB
In fact, the total size of Alera.cz main page is 806.2 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. 25% of websites need less resources to load. Images take 593.2 kB which makes up the majority of the site volume.
Potential reduce by 35.3 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 35.3 kB or 79% of the original size.
Potential reduce by 228.4 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, ALERA needs image optimization as it can save up to 228.4 kB or 39% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 85.1 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 85.1 kB or 68% of the original size.
Potential reduce by 33.8 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. Alera.cz needs all CSS files to be minified and compressed as it can save up to 33.8 kB or 80% of the original size.
Number of requests can be reduced by 18 (29%)
63
45
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ALERA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.
alera.cz
980 ms
layout.css
616 ms
product.css
620 ms
buttons.css
399 ms
normalize.css
514 ms
style.css
506 ms
menu.css
410 ms
css
35 ms
jquery.min.js
15 ms
popupMenu.js
653 ms
overLib.js
1043 ms
utils-1.1.js
638 ms
jquery.jscroll.min.js
640 ms
jquery.flexslider-min.js
863 ms
flexslider.css
752 ms
jquery.colorbox.js
1016 ms
colorbox.css
779 ms
jquery.tipsy.js
785 ms
tipsy.css
778 ms
onloadscript.js
805 ms
ga.js
67 ms
img.aspx
157 ms
w1ybnp.jpg
735 ms
logo.png
579 ms
basket.png
165 ms
arrow-white.png
191 ms
plus.gif
178 ms
plus_minus_empty.gif
179 ms
two.png
338 ms
one.png
543 ms
kolaz.jpg
897 ms
odkaznik.gif
378 ms
img.aspx
393 ms
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417 ms
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455 ms
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rozmery-papiru,obalek_2015-02-19-11-09-26.jpg
2851 ms
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279 ms
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14 ms
alera.cz accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
button, link, and menuitem elements do not have accessible names.
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
Form elements do not have associated labels
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
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.
alera.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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
alera.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 doesn't use legible font sizes
Tap targets are not sized appropriately
CS
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Alera.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 Alera.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.
alera.cz
Open Graph description is not detected on the main page of ALERA. 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: