Tools & Wizards About Us
emerx.cz screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

emerx.cz

Dálkové ovladače, LED pásky, akumulátory, nářadí a mnohem víc | emerx.cz

Page Load Speed

4.1 sec in total

First Response

404 ms

Resources Loaded

3.3 sec

Page Rendered

360 ms

emerx.cz screenshot

About Website

Welcome to emerx.cz homepage info - get ready to check Emerx best content for Czech Republic right away, or after learning these important things about emerx.cz

Hledáte nový dálkový ovladač? Na emerx.cz najdete přes 7000 druhů originálních i náhradních ovladačů. Poradíme Vám a pomůžeme vybrat nejen

Visit emerx.cz

Key Findings

We analyzed Emerx.cz page load time and found that the first response time was 404 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

emerx.cz performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value10.6 s

7/100

10%

TBT (Total Blocking Time)

Value710 ms

42/100

30%

CLS (Cumulative Layout Shift)

Value0.102

89/100

15%

TTI (Time to Interactive)

Value13.3 s

11/100

10%

Network Requests Diagram

emerx.cz

404 ms

www.emerx.cz

1294 ms

jsloader-10e8086c499c.js

397 ms

mainMenu.css

293 ms

bootstrap.min.css

391 ms

Our browser made a total of 91 requests to load all elements on the main page. We found that 79% of them (72 requests) were addressed to the original Emerx.cz, 2% (2 requests) were made to Cdn.jsdelivr.net and 2% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Emerx.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 116.1 kB (9%)

Content Size

1.3 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Emerx.cz main page is 1.3 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. 70% of websites need less resources to load. Images take 420.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 72.7 kB

  • Original 94.0 kB
  • After minification 85.6 kB
  • After compression 21.4 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 72.7 kB or 77% of the original size.

Image Optimization

-8%

Potential reduce by 35.6 kB

  • Original 420.6 kB
  • After minification 385.0 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. Emerx images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 4.1 kB

  • Original 361.7 kB
  • After minification 361.7 kB
  • After compression 357.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-1%

Potential reduce by 3.8 kB

  • Original 410.9 kB
  • After minification 410.9 kB
  • After compression 407.1 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. Emerx.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 51 (59%)

Requests Now

86

After Optimization

35

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 86 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Emerx. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and from 20 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

emerx.cz

emerx.cz

404 ms

www.emerx.cz

www.emerx.cz

1294 ms

jsloader-10e8086c499c.js

jsloader-10e8086c499c.js

397 ms

mainMenu.css

mainMenu.css

293 ms

bootstrap.min.css

bootstrap.min.css

391 ms

animate.min.css

animate.min.css

293 ms

jquery.countdown.css

jquery.countdown.css

294 ms

font-awesome.min.css

font-awesome.min.css

294 ms

bootstrap-image-gallery.min.css

bootstrap-image-gallery.min.css

389 ms

jquery-ui-1.9.2.custom.css

jquery-ui-1.9.2.custom.css

391 ms

colorbox.css

colorbox.css

390 ms

style.css

style.css

878 ms

style.css

style.css

488 ms

filter.css

filter.css

491 ms

blueimp-gallery.min.css

blueimp-gallery.min.css

489 ms

bootstrap-image-gallery.min.css

bootstrap-image-gallery.min.css

491 ms

select2.css

select2.css

493 ms

select2-bootstrap.css

select2-bootstrap.css

584 ms

bootstrap.vertical-tabs.min.css

bootstrap.vertical-tabs.min.css

593 ms

cookieconsent.js

cookieconsent.js

15 ms

cookieconsent.css

cookieconsent.css

15 ms

saleBox.css

saleBox.css

594 ms

respond.min.js

respond.min.js

593 ms

mainMenu.js

mainMenu.js

591 ms

js

js

69 ms

jquery.countdown.min.js

jquery.countdown.min.js

680 ms

jquery.cslider.js

jquery.cslider.js

688 ms

modernizr.custom.28468.js

modernizr.custom.28468.js

689 ms

slider_banner.css

slider_banner.css

690 ms

css

css

26 ms

jsloader-61422b149f6d.js

jsloader-61422b149f6d.js

869 ms

script.js

script.js

687 ms

blueimp-gallery.min.js

blueimp-gallery.min.js

696 ms

bootstrap-image-gallery.min.js

bootstrap-image-gallery.min.js

697 ms

conversion.js

conversion.js

94 ms

retargeting.js

retargeting.js

699 ms

gtm.js

gtm.js

70 ms

b2.png

b2.png

127 ms

flag-cz.png

flag-cz.png

127 ms

flag-sk.png

flag-sk.png

128 ms

logo_2015.png

logo_2015.png

129 ms

cart.png

cart.png

129 ms

active-menu.png

active-menu.png

128 ms

menu-separator.png

menu-separator.png

199 ms

auto.png

auto.png

198 ms

dum.png

dum.png

199 ms

osvetleni.png

osvetleni.png

200 ms

4.png

4.png

200 ms

2.png

2.png

200 ms

5.png

5.png

311 ms

1.png

1.png

311 ms

3.png

3.png

311 ms

hracky.png

hracky.png

311 ms

bat.png

bat.png

311 ms

zabava.png

zabava.png

310 ms

zahrada.png

zahrada.png

408 ms

1.jpg

1.jpg

405 ms

2.jpg

2.jpg

503 ms

3.jpg

3.jpg

503 ms

06440586.jpg

06440586.jpg

404 ms

pctdetail.052-154.1.jpg

pctdetail.052-154.1.jpg

406 ms

77+9SRhL77+977+9.emimg

77+9SRhL77+977+9.emimg

504 ms

pctdetail-333-004-1.jpg

pctdetail-333-004-1.jpg

504 ms

06431599.jpg

06431599.jpg

504 ms

04170463.jpg

04170463.jpg

505 ms

ee-08-011.jpg

ee-08-011.jpg

598 ms

ee-08-058.png

ee-08-058.png

599 ms

g688e.jpg

g688e.jpg

602 ms

shipping-28.png

shipping-28.png

600 ms

posta-logo-footer.png

posta-logo-footer.png

601 ms

overeno-ico.png

overeno-ico.png

600 ms

garance-footer.png

garance-footer.png

640 ms

payment-method_new.png

payment-method_new.png

639 ms

AmSkYQAA

AmSkYQAA

43 ms

arrows.png

arrows.png

526 ms

stars.png

stars.png

505 ms

prc.png

prc.png

504 ms

gjs.php

gjs.php

567 ms

footer-bg.jpg

footer-bg.jpg

453 ms

footer-border.png

footer-border.png

565 ms

widgets.js

widgets.js

51 ms

plusone.js

plusone.js

50 ms

all.js

all.js

48 ms

76 ms

all.js

all.js

28 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

21 ms

31 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

32 ms

overlay.png

overlay.png

240 ms

settings

settings

68 ms

landing

landing

81 ms

Accessibility Review

emerx.cz accessibility score

82

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

emerx.cz best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

emerx.cz SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Emerx.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 Emerx.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.

Social Sharing Optimization

emerx.cz

Open Graph description is not detected on the main page of Emerx. 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: