Tools & Wizards About Us
elventil.cz screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

elventil.cz

Specializovaný obchod s regulační technikou | Elventil

Page Load Speed

7 sec in total

First Response

303 ms

Resources Loaded

5.8 sec

Page Rendered

908 ms

elventil.cz screenshot

About Website

Visit elventil.cz now to see the best up-to-date Elventil content for Czech Republic and also check out these interesting facts you probably never knew about elventil.cz

Specializovaný obchod s elektronikou. V našem sortimentu najdete ventily, servopohony, termostaty, čerpadla, měniče, gelové baterie, záložní zdroj, solární panely.

Visit elventil.cz

Key Findings

We analyzed Elventil.cz page load time and found that the first response time was 303 ms and then it took 6.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

elventil.cz performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

26/100

25%

SI (Speed Index)

Value6.3 s

42/100

10%

TBT (Total Blocking Time)

Value700 ms

42/100

30%

CLS (Cumulative Layout Shift)

Value0.377

28/100

15%

TTI (Time to Interactive)

Value8.4 s

38/100

10%

Network Requests Diagram

elventil.cz

303 ms

www.elventil.cz

814 ms

cache_default_css.css

198 ms

cache_css.css

475 ms

ie11.css

291 ms

Our browser made a total of 165 requests to load all elements on the main page. We found that all of those requests were addressed to Elventil.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Elventil.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 259.6 kB (8%)

Content Size

3.3 MB

After Optimization

3.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Elventil.cz main page is 3.3 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 2.9 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 134.3 kB

  • Original 155.7 kB
  • After minification 141.2 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 134.3 kB or 86% of the original size.

Image Optimization

-4%

Potential reduce by 114.2 kB

  • Original 2.9 MB
  • After minification 2.8 MB

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. Elventil images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 883 B

  • Original 152.1 kB
  • After minification 152.1 kB
  • After compression 151.2 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

-10%

Potential reduce by 10.2 kB

  • Original 99.3 kB
  • After minification 99.3 kB
  • After compression 89.1 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. Elventil.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 57 (35%)

Requests Now

163

After Optimization

106

  • Images
  • JavaScript
  • CSS

The browser has sent 163 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Elventil. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 40 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

elventil.cz

elventil.cz

303 ms

www.elventil.cz

www.elventil.cz

814 ms

cache_default_css.css

cache_default_css.css

198 ms

cache_css.css

cache_css.css

475 ms

ie11.css

ie11.css

291 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

395 ms

jquery-ui.min.js

jquery-ui.min.js

508 ms

jquery-ui.min.css

jquery-ui.min.css

297 ms

jqueryFunctions.min.js

jqueryFunctions.min.js

308 ms

nouislider.min.js

nouislider.min.js

387 ms

combobox.min.js

combobox.min.js

393 ms

lazyload.min.js

lazyload.min.js

409 ms

owl.carousel.min.js

owl.carousel.min.js

506 ms

jquery.superslides.min.js

jquery.superslides.min.js

506 ms

jquery.fancybox.min.js

jquery.fancybox.min.js

507 ms

fancyBoxInit.min.js

fancyBoxInit.min.js

550 ms

backTop.min.js

backTop.min.js

566 ms

header_shrink.js

header_shrink.js

603 ms

modalWindow.js

modalWindow.js

604 ms

dropdownScript.js

dropdownScript.js

604 ms

wishlist.min.js

wishlist.min.js

605 ms

productSwapImages.min.js

productSwapImages.min.js

626 ms

modalWindowDialogClass.min.js

modalWindowDialogClass.min.js

661 ms

clearGDPRCookies.min.js

clearGDPRCookies.min.js

678 ms

productVideoModal.min.js

productVideoModal.min.js

682 ms

searchBox.min.js

searchBox.min.js

682 ms

autocomplete.min.js

autocomplete.min.js

686 ms

searchBoxSelect.min.js

searchBoxSelect.min.js

710 ms

searchBoxMobile.min.js

searchBoxMobile.min.js

751 ms

wishlist_box.min.js

wishlist_box.min.js

773 ms

modalLogin.min.js

modalLogin.min.js

779 ms

cartContentFunctions.min.js

cartContentFunctions.min.js

780 ms

cartWrap.min.js

cartWrap.min.js

783 ms

categoriesMenuTreeMobileInit.min.js

categoriesMenuTreeMobileInit.min.js

722 ms

slideshow.min.js

slideshow.min.js

756 ms

categoriesMenuTreeInit.min.js

categoriesMenuTreeInit.min.js

781 ms

leftMenu.min.js

leftMenu.min.js

787 ms

staticPageMenuTreeInit.min.js

staticPageMenuTreeInit.min.js

786 ms

survey.min.js

survey.min.js

677 ms

todayOffer.min.js

todayOffer.min.js

625 ms

titlePageCarouselSelectedProducts.min.js

titlePageCarouselSelectedProducts.min.js

646 ms

titlePageCarouselMostSoldProducts.min.js

titlePageCarouselMostSoldProducts.min.js

662 ms

titlePageCarouselNewProducts.min.js

titlePageCarouselNewProducts.min.js

589 ms

footerManufacturersCarousel.min.js

footerManufacturersCarousel.min.js

584 ms

mobileClassicVersion.min.js

mobileClassicVersion.min.js

587 ms

cookiesPanel.min.js

cookiesPanel.min.js

606 ms

logo.png

logo.png

530 ms

cz.jpg

cz.jpg

562 ms

procenta.png

procenta.png

566 ms

ventilpohon200.jpg

ventilpohon200.jpg

569 ms

akumulator.png

akumulator.png

532 ms

cerpadla_symbol.jpg

cerpadla_symbol.jpg

655 ms

blesk.jpg

blesk.jpg

562 ms

filtr_na_vodu.png

filtr_na_vodu.png

850 ms

mar.jpg

mar.jpg

564 ms

plyn.png

plyn.png

565 ms

hydraulika.png

hydraulika.png

549 ms

smart.png

smart.png

586 ms

solar.png

solar.png

601 ms

topeni.jpg

topeni.jpg

590 ms

kapka.png

kapka.png

588 ms

zap.png

zap.png

631 ms

trefa2.jpg

trefa2.jpg

629 ms

solarni-panely-2.jpg

solarni-panely-2.jpg

753 ms

mapa%20hodkovicka.jpg

mapa%20hodkovicka.jpg

807 ms

karty2.jpg

karty2.jpg

596 ms

lin2.png

lin2.png

634 ms

doprava.jpg

doprava.jpg

627 ms

vimecoprodavame.jpg

vimecoprodavame.jpg

684 ms

akcninabidka.jpg

akcninabidka.jpg

694 ms

kamenaprodejna.jpg

kamenaprodejna.jpg

671 ms

otevreno247.jpg

otevreno247.jpg

680 ms

platbakartou.jpg

platbakartou.jpg

683 ms

trojdilny%20filtr%20IBO%204%20small.jpg

trojdilny%20filtr%20IBO%204%20small.jpg

687 ms

loader.gif

loader.gif

718 ms

osobny-odber.png

osobny-odber.png

706 ms

wedo2.jpg

wedo2.jpg

709 ms

ppl.jpg

ppl.jpg

689 ms

1600754308dopravaelventil.png

1600754308dopravaelventil.png

686 ms

parcelshop2.jpg

parcelshop2.jpg

689 ms

1649163508parcelshop2.jpg

1649163508parcelshop2.jpg

714 ms

ppl_2.jpg

ppl_2.jpg

706 ms

gls.png

gls.png

712 ms

dopravzdarma.png

dopravzdarma.png

688 ms

headset.svg

headset.svg

684 ms

arrow_down.svg

arrow_down.svg

685 ms

wishlist.svg

wishlist.svg

706 ms

settings.svg

settings.svg

691 ms

user_acc_phone.svg

user_acc_phone.svg

675 ms

clock.svg

clock.svg

682 ms

more.svg

more.svg

681 ms

mail_footer.svg

mail_footer.svg

644 ms

fb.svg

fb.svg

661 ms

li_arrow.svg

li_arrow.svg

655 ms

cookies.svg

cookies.svg

673 ms

combobox.css

combobox.css

649 ms

mainPageBanner.css

mainPageBanner.css

648 ms

jquery.fancybox.min.css

jquery.fancybox.min.css

650 ms

nouislider.css

nouislider.css

646 ms

customClick.css

customClick.css

648 ms

dupl_28144_2n20mosaz.jpg

dupl_28144_2n20mosaz.jpg

100 ms

sada-pro-ohrev-vody-2-5kw-gwh01.jpg

sada-pro-ohrev-vody-2-5kw-gwh01.jpg

99 ms

sada-pro-ohrev-vody-gwh01_30644.jpg

sada-pro-ohrev-vody-gwh01_30644.jpg

203 ms

carspa-px500.jpg

carspa-px500.jpg

202 ms

carspa-px500-2.jpg

carspa-px500-2.jpg

100 ms

umhp425.jpg

umhp425.jpg

205 ms

100ah.jpg

100ah.jpg

203 ms

100ah3.png

100ah3.png

320 ms

kalove-cerpadlo-s-hadici-3.jpg

kalove-cerpadlo-s-hadici-3.jpg

203 ms

kalove-cerpadlo-hunter-5_1679557112_489_29284.jpg

kalove-cerpadlo-hunter-5_1679557112_489_29284.jpg

291 ms

ibo-3-scr-2.jpg

ibo-3-scr-2.jpg

320 ms

ibo-3-scr-5.jpg

ibo-3-scr-5.jpg

321 ms

carspa-menic-napeti-600w-1.jpg

carspa-menic-napeti-600w-1.jpg

322 ms

1612413320_300_carspa-menic-napeti-600w.jpg

1612413320_300_carspa-menic-napeti-600w.jpg

322 ms

ctyrcestny-smesovacii-ventil.jpg

ctyrcestny-smesovacii-ventil.jpg

388 ms

ctyrcestny-smesovacii-ventil-2.jpg

ctyrcestny-smesovacii-ventil-2.jpg

406 ms

1-akumulator-agm-green-cell-12v-100ah.jpg

1-akumulator-agm-green-cell-12v-100ah.jpg

406 ms

2-akumulator-agm-green-cell-12v-100ah.jpg

2-akumulator-agm-green-cell-12v-100ah.jpg

406 ms

kalova-cerpadlo-550w-s-hadici-20m.jpg

kalova-cerpadlo-550w-s-hadici-20m.jpg

408 ms

kalove-cerpadlo-nikl.jpg

kalove-cerpadlo-nikl.jpg

430 ms

dupl_28096_dupl_28095_dupl_28094_dupl_28090_dupl_28088_1568394229_361_elektromagneticky-ventil-2.jpg

dupl_28096_dupl_28095_dupl_28094_dupl_28090_dupl_28088_1568394229_361_elektromagneticky-ventil-2.jpg

471 ms

fsa1.jpg

fsa1.jpg

508 ms

solarni-ohrev-vody-1800w.jpg

solarni-ohrev-vody-1800w.jpg

510 ms

solarni-ohrev-vody-1800w-3.jpg

solarni-ohrev-vody-1800w-3.jpg

508 ms

trojity-filtr-s-nahradnimi-vlozkami-10.jpg

trojity-filtr-s-nahradnimi-vlozkami-10.jpg

511 ms

trojity-filtr-s-nahradnimi-vlozkami-8.jpg

trojity-filtr-s-nahradnimi-vlozkami-8.jpg

512 ms

kalova-cerpadlo-550w-s-pozarni-hadici-30m_1718176533_157.jpg

kalova-cerpadlo-550w-s-pozarni-hadici-30m_1718176533_157.jpg

574 ms

kalova-cerpadlo-550w-s-hadici-20m_1718176532_856.jpg

kalova-cerpadlo-550w-s-hadici-20m_1718176532_856.jpg

604 ms

kalova-cerpadlo-550w-s-hadici-30m-2.jpg

kalova-cerpadlo-550w-s-hadici-30m-2.jpg

606 ms

kalove-cerpadlo-nerez-s-drticem-2_30206_30207.jpeg

kalove-cerpadlo-nerez-s-drticem-2_30206_30207.jpeg

606 ms

termostaticka-gtv03-2.jpg

termostaticka-gtv03-2.jpg

607 ms

termostaticka-gtv03-5.jpg

termostaticka-gtv03-5.jpg

629 ms

termostaticka-hlavice-gwh02-2.jpg

termostaticka-hlavice-gwh02-2.jpg

655 ms

termostaticka-hlavice-gwh02-6.jpg

termostaticka-hlavice-gwh02-6.jpg

685 ms

nastenny-zalozni-zdroj-800w-s-baterii-75ah_31251.jpg

nastenny-zalozni-zdroj-800w-s-baterii-75ah_31251.jpg

670 ms

nastenny-zalozni-zdroj-800w-s-baterii_31251.jpg

nastenny-zalozni-zdroj-800w-s-baterii_31251.jpg

668 ms

nastenny-zalozni-zdroj-800w-s-baterii-75ah_31249_31250.jpg

nastenny-zalozni-zdroj-800w-s-baterii-75ah_31249_31250.jpg

595 ms

nastenny-zalozni-zdroj-800w-s-baterii_31249_31250.jpg

nastenny-zalozni-zdroj-800w-s-baterii_31249_31250.jpg

623 ms

zalozni%20zdroj%20pro%20cerpadlo%20WPU.jpg

zalozni%20zdroj%20pro%20cerpadlo%20WPU.jpg

1304 ms

ZV2_RGB.png

ZV2_RGB.png

681 ms

IBO-VANTEC-25-60-180%204.jpg

IBO-VANTEC-25-60-180%204.jpg

678 ms

elektromagnetick%C3%BD%20ventil%20FSA%203.jpg

elektromagnetick%C3%BD%20ventil%20FSA%203.jpg

587 ms

avansa.jpg

avansa.jpg

584 ms

carspa.jpg

carspa.jpg

608 ms

einbach.png

einbach.png

1098 ms

esbe.jpg

esbe.jpg

1079 ms

euroster.jpg

euroster.jpg

1080 ms

general-life.png

general-life.png

1079 ms

gc.png

gc.png

1079 ms

honeywell.jpg

honeywell.jpg

1065 ms

johnson_controls.jpg

johnson_controls.jpg

999 ms

lufberg.jpg

lufberg.jpg

998 ms

pollucom.jpg

pollucom.jpg

998 ms

rohtenbach.jpg

rohtenbach.jpg

998 ms

salus2.png

salus2.png

986 ms

siemens.png

siemens.png

964 ms

thermokon.png

thermokon.png

917 ms

victron.png

victron.png

900 ms

dobirka.png

dobirka.png

900 ms

hotove.png

hotove.png

899 ms

proforma.jpg

proforma.jpg

899 ms

arrow_border_left.svg

arrow_border_left.svg

881 ms

arrow_border_right.svg

arrow_border_right.svg

824 ms

slideshow_right.svg

slideshow_right.svg

808 ms

slideshow_left.svg

slideshow_left.svg

809 ms

Accessibility Review

elventil.cz accessibility score

93

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

Links do not have a discernible name

Best Practices

elventil.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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

elventil.cz SEO score

93

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

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

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 Elventil.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 Elventil.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

elventil.cz

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