Tools & Wizards About Us
cosmo.cz screenshot

Report Summary

  • 65

    Performance

    Renders faster than
    78% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 81% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 95

    SEO

    Google-friendlier than
    90% of websites

cosmo.cz

Parfémy na COSMO.CZ. Levné parfemy a vůně skladem a se slevou až 70%

Page Load Speed

3.3 sec in total

First Response

311 ms

Resources Loaded

2.8 sec

Page Rendered

195 ms

cosmo.cz screenshot

About Website

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

Parfémy na COSMO.CZ - sleva 20-70%, doprava do 24h. Naše parfumerie dodává levné parfemy a testery, vzorek vůně k nákupu. Nejlevnější parfémy.

Visit cosmo.cz

Key Findings

We analyzed Cosmo.cz page load time and found that the first response time was 311 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

cosmo.cz performance score

65

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

64/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

2/100

25%

SI (Speed Index)

Value3.7 s

86/100

10%

TBT (Total Blocking Time)

Value110 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

cosmo.cz

311 ms

www.cosmo.cz

409 ms

www.cosmo.cz

730 ms

main.min.css

122 ms

main.min.js

240 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 93% of them (39 requests) were addressed to the original Cosmo.cz, 2% (1 request) were made to Code.jquery.com and 2% (1 request) were made to Googleadservices.com. The less responsive or slowest element that took the longest time to load (730 ms) belongs to the original domain Cosmo.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 61.9 kB (24%)

Content Size

252.9 kB

After Optimization

191.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cosmo.cz main page is 252.9 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. 15% of websites need less resources to load. Javascripts take 110.9 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 25.9 kB

  • Original 33.4 kB
  • After minification 31.0 kB
  • After compression 7.5 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 25.9 kB or 77% of the original size.

Image Optimization

-0%

Potential reduce by 190 B

  • Original 100.2 kB
  • After minification 100.0 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. COSMO images are well optimized though.

JavaScript Optimization

-32%

Potential reduce by 35.8 kB

  • Original 110.9 kB
  • After minification 110.9 kB
  • After compression 75.1 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 35.8 kB or 32% of the original size.

CSS Optimization

-0%

Potential reduce by 26 B

  • Original 8.4 kB
  • After minification 8.4 kB
  • After compression 8.3 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. Cosmo.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (31%)

Requests Now

39

After Optimization

27

  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of COSMO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

cosmo.cz

cosmo.cz

311 ms

www.cosmo.cz

www.cosmo.cz

409 ms

www.cosmo.cz

www.cosmo.cz

730 ms

main.min.css

main.min.css

122 ms

main.min.js

main.min.js

240 ms

jquery-3.6.0.slim.min.js

jquery-3.6.0.slim.min.js

23 ms

letni_vune_lancome_idole.jpg

letni_vune_lancome_idole.jpg

433 ms

yves-saint-laurent-mon-paris-tester_s.jpg

yves-saint-laurent-mon-paris-tester_s.jpg

286 ms

boucheron-quatre-tester_s.jpg

boucheron-quatre-tester_s.jpg

286 ms

davidoff-cool-water-woman-100-21_s.jpg

davidoff-cool-water-woman-100-21_s.jpg

292 ms

dunhill-blue-tester-21_s.jpg

dunhill-blue-tester-21_s.jpg

296 ms

nina-ricci-l-air-du-temps-edp-100-22_s.jpg

nina-ricci-l-air-du-temps-edp-100-22_s.jpg

339 ms

dior.png

dior.png

380 ms

giorgio_armani.png

giorgio_armani.png

378 ms

gucci.gif

gucci.gif

390 ms

calvin_klein.gif

calvin_klein.gif

394 ms

hugo_boss.gif

hugo_boss.gif

437 ms

bvlgari.gif

bvlgari.gif

472 ms

dolce_gabbana.gif

dolce_gabbana.gif

473 ms

versace.png

versace.png

489 ms

lancome_logo.png

lancome_logo.png

491 ms

narciso-rodriguez-for-her-edt-100-21_s.jpg

narciso-rodriguez-for-her-edt-100-21_s.jpg

524 ms

nina-ricci-premier-jour-100-21_s.jpg

nina-ricci-premier-jour-100-21_s.jpg

535 ms

rochas-moustache_s.jpg

rochas-moustache_s.jpg

566 ms

dunhill-driven-edt-100-22_s.jpg

dunhill-driven-edt-100-22_s.jpg

566 ms

nina-ricci-l-air-du-temps-edt-100-22_s.jpg

nina-ricci-l-air-du-temps-edt-100-22_s.jpg

585 ms

lancome-la-vie-est-belle-en-rose-tester_s.jpg

lancome-la-vie-est-belle-en-rose-tester_s.jpg

589 ms

jean-paul-gaultier-divine-edp-50-24_s.jpg

jean-paul-gaultier-divine-edp-50-24_s.jpg

620 ms

conversion.js

conversion.js

82 ms

thierry-mugler-angel-elixir-25-24_s.jpg

thierry-mugler-angel-elixir-25-24_s.jpg

634 ms

calvin-klein-ck-everyone-edp-100-24_s.jpg

calvin-klein-ck-everyone-edp-100-24_s.jpg

660 ms

bg_content.gif

bg_content.gif

532 ms

cosmo_logo.png

cosmo_logo.png

556 ms

bg_li.gif

bg_li.gif

559 ms

btn_pink_search.png

btn_pink_search.png

589 ms

bezplatna_linka_zdarma.png

bezplatna_linka_zdarma.png

606 ms

akce_novinky_emailem.png

akce_novinky_emailem.png

627 ms

pinkdot4px.png

pinkdot4px.png

629 ms

bg_kosik.gif

bg_kosik.gif

655 ms

fb_small_15.png

fb_small_15.png

658 ms

instagram_logo_15x15.png

instagram_logo_15x15.png

683 ms

retargeting.js

retargeting.js

684 ms

Accessibility Review

cosmo.cz accessibility score

93

Accessibility Issues

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

Form elements do not have associated labels

Best Practices

cosmo.cz best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

cosmo.cz SEO score

95

Search Engine Optimization Advices

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 Cosmo.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 Cosmo.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

cosmo.cz

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