Tools & Wizards About Us
twin.cz screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 81

    SEO

    Google-friendlier than
    43% of websites

twin.cz

TWIN s.r.o. dveřní kování, okenní kování, bezpečnostní kování, zavírače - Domů

Page Load Speed

3.7 sec in total

First Response

692 ms

Resources Loaded

2.7 sec

Page Rendered

270 ms

twin.cz screenshot

About Website

Welcome to twin.cz homepage info - get ready to check TWIN best content right away, or after learning these important things about twin.cz

Prodej kování Twin, kliky, bezpečnostní kování, okenní kování, doprodej kování a doplňky

Visit twin.cz

Key Findings

We analyzed Twin.cz page load time and found that the first response time was 692 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

twin.cz performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value15.3 s

0/100

25%

SI (Speed Index)

Value12.7 s

3/100

10%

TBT (Total Blocking Time)

Value1,330 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value14.9 s

8/100

10%

Network Requests Diagram

twin.cz

692 ms

jquery.js

327 ms

jquery.cycle.all.js

356 ms

jquery.touchslider.min.js

228 ms

jquery.easing.1.3.js

223 ms

Our browser made a total of 87 requests to load all elements on the main page. We found that 90% of them (78 requests) were addressed to the original Twin.cz, 3% (3 requests) were made to Google-analytics.com and 2% (2 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Twin.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 503.7 kB (39%)

Content Size

1.3 MB

After Optimization

792.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Twin.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. 45% of websites need less resources to load. Images take 712.1 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 35.3 kB

  • Original 46.0 kB
  • After minification 44.5 kB
  • After compression 10.7 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 35.3 kB or 77% of the original size.

Image Optimization

-9%

Potential reduce by 62.7 kB

  • Original 712.1 kB
  • After minification 649.5 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. TWIN images are well optimized though.

JavaScript Optimization

-75%

Potential reduce by 359.2 kB

  • Original 481.1 kB
  • After minification 342.9 kB
  • After compression 121.9 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 359.2 kB or 75% of the original size.

CSS Optimization

-81%

Potential reduce by 46.6 kB

  • Original 57.3 kB
  • After minification 40.2 kB
  • After compression 10.8 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. Twin.cz needs all CSS files to be minified and compressed as it can save up to 46.6 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 50 (60%)

Requests Now

83

After Optimization

33

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 83 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TWIN. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

twin.cz

twin.cz

692 ms

jquery.js

jquery.js

327 ms

jquery.cycle.all.js

jquery.cycle.all.js

356 ms

jquery.touchslider.min.js

jquery.touchslider.min.js

228 ms

jquery.easing.1.3.js

jquery.easing.1.3.js

223 ms

jquery.mouseSwipe.1.0.2.min.js

jquery.mouseSwipe.1.0.2.min.js

217 ms

conversion.js

conversion.js

17 ms

jceutilities.css

jceutilities.css

229 ms

style.css

style.css

373 ms

attachments.css

attachments.css

373 ms

ja.news.css

ja.news.css

375 ms

ja.slideshow.css

ja.slideshow.css

376 ms

mootools-uncompressed.js

mootools-uncompressed.js

642 ms

jceutilities.js

jceutilities.js

430 ms

mediaobject-150.js

mediaobject-150.js

447 ms

caption.js

caption.js

446 ms

system.css

system.css

448 ms

general.css

general.css

448 ms

template.css

template.css

534 ms

typo.css

typo.css

563 ms

ja.vm.css

ja.vm.css

563 ms

ja.script.js

ja.script.js

564 ms

ja.cssmenu.css

ja.cssmenu.css

564 ms

ja.cssmenu.js

ja.cssmenu.js

637 ms

green.css

green.css

673 ms

ja.slideshow.js

ja.slideshow.js

667 ms

ja.news.js

ja.news.js

707 ms

L.js

L.js

223 ms

68 ms

design_shaker_2016_web_banner.png

design_shaker_2016_web_banner.png

653 ms

leko_nov_katalog_web_banner.jpg

leko_nov_katalog_web_banner.jpg

591 ms

kosik.gif

kosik.gif

395 ms

1ab.jpg

1ab.jpg

737 ms

testtel.png

testtel.png

433 ms

ds.png

ds.png

439 ms

klikydomu.png

klikydomu.png

498 ms

kancelare.png

kancelare.png

543 ms

bezpectest.png

bezpectest.png

545 ms

vzorkovnytest.png

vzorkovnytest.png

605 ms

nivinky.png

nivinky.png

652 ms

banner%20klik.jpg

banner%20klik.jpg

861 ms

xinnix.jpg

xinnix.jpg

691 ms

logox.png

logox.png

714 ms

ergon.png

ergon.png

761 ms

videoergon.png

videoergon.png

760 ms

ergon.jpg

ergon.jpg

796 ms

compack.jpg

compack.jpg

924 ms

compack.png

compack.png

837 ms

video.png

video.png

865 ms

lekow.jpg

lekow.jpg

866 ms

54 ms

ga.js

ga.js

20 ms

__utm.gif

__utm.gif

12 ms

45 ms

59 ms

asterisk_orange.png

asterisk_orange.png

836 ms

cstitek.png

cstitek.png

873 ms

bezpec.png

bezpec.png

891 ms

okno.png

okno.png

900 ms

doplnky.png

doplnky.png

901 ms

sklo.png

sklo.png

838 ms

ergon1.png

ergon1.png

839 ms

posuvne_kovani.png

posuvne_kovani.png

862 ms

panikove_kovani.png

panikove_kovani.png

891 ms

dverni_zavirac.png

dverni_zavirac.png

896 ms

leko.png

leko.png

827 ms

doprodej.png

doprodej.png

823 ms

reisova.jpg

reisova.jpg

1050 ms

piktogram.jpg

piktogram.jpg

1036 ms

livemarks.png

livemarks.png

840 ms

__utm.gif

__utm.gif

12 ms

bullet.gif

bullet.gif

791 ms

main-tr.gif

main-tr.gif

779 ms

main-tl.gif

main-tl.gif

776 ms

logo.gif

logo.gif

812 ms

vmcart-bg.gif

vmcart-bg.gif

777 ms

icon-search.png

icon-search.png

778 ms

dot-dark.gif

dot-dark.gif

730 ms

dot.gif

dot.gif

813 ms

bgtwin.png

bgtwin.png

772 ms

2.jpg

2.jpg

990 ms

dot-h.gif

dot-h.gif

742 ms

arrow.png

arrow.png

748 ms

dot-hilite.gif

dot-hilite.gif

755 ms

main-br.gif

main-br.gif

764 ms

main-bl.gif

main-bl.gif

762 ms

logo-sub.gif

logo-sub.gif

746 ms

Accessibility Review

twin.cz accessibility score

67

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

twin.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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

twin.cz SEO score

81

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 Twin.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 Twin.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

twin.cz

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