Tools & Wizards About Us
sinai.cz screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

sinai.cz

Skleněné posuvné dveře, stěny a sprchové kouty na míru | Sinai

Page Load Speed

3.7 sec in total

First Response

400 ms

Resources Loaded

2.9 sec

Page Rendered

399 ms

sinai.cz screenshot

About Website

Click here to check amazing Sinai content for Czech Republic. Otherwise, check out these important facts you probably never knew about sinai.cz

Vyrábíme skleněné posuvné dveře, skleněné stěny, skleněné zástěny, skleněné sprchové kouty a skleněné zábradlí. Na sklo používáme kvalitní německé kování.

Visit sinai.cz

Key Findings

We analyzed Sinai.cz page load time and found that the first response time was 400 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

sinai.cz performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.851

4/100

15%

TTI (Time to Interactive)

Value6.7 s

56/100

10%

Network Requests Diagram

sinai.cz

400 ms

www.sinai.cz

721 ms

js

66 ms

2bd3e3fc8ddc915d2825f72ea07df477178f07ef.css

200 ms

tabber.css

284 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 68% of them (32 requests) were addressed to the original Sinai.cz, 11% (5 requests) were made to Fonts.gstatic.com and 6% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (952 ms) belongs to the original domain Sinai.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 831.3 kB (14%)

Content Size

5.9 MB

After Optimization

5.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sinai.cz main page is 5.9 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 5.5 MB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 18.8 kB

  • Original 24.6 kB
  • After minification 21.1 kB
  • After compression 5.8 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. This page needs HTML code to be minified as it can gain 3.5 kB, which is 14% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 18.8 kB or 76% of the original size.

Image Optimization

-15%

Potential reduce by 806.9 kB

  • Original 5.5 MB
  • After minification 4.7 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. Obviously, Sinai needs image optimization as it can save up to 806.9 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 92 B

  • Original 294.0 kB
  • After minification 294.0 kB
  • After compression 293.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-9%

Potential reduce by 5.5 kB

  • Original 58.3 kB
  • After minification 58.3 kB
  • After compression 52.8 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. Sinai.cz has all CSS files already compressed.

Requests Breakdown

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

Requests Now

39

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sinai. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sinai.cz

sinai.cz

400 ms

www.sinai.cz

www.sinai.cz

721 ms

js

js

66 ms

2bd3e3fc8ddc915d2825f72ea07df477178f07ef.css

2bd3e3fc8ddc915d2825f72ea07df477178f07ef.css

200 ms

tabber.css

tabber.css

284 ms

jquery-ui.min.css

jquery-ui.min.css

285 ms

main.css

main.css

292 ms

css

css

38 ms

976a314a769b8f308354b51a004bc40bf40d3e97.js

976a314a769b8f308354b51a004bc40bf40d3e97.js

722 ms

swiper.min.js

swiper.min.js

34 ms

rc.js

rc.js

591 ms

1fad649c8661e19337454684204729940c61dbfa.css

1fad649c8661e19337454684204729940c61dbfa.css

295 ms

9b1d10a44f8fb8cb38200117c780ae31effc1036.js

9b1d10a44f8fb8cb38200117c780ae31effc1036.js

295 ms

js

js

45 ms

analytics.js

analytics.js

87 ms

navbar-logo.png

navbar-logo.png

111 ms

homepage-callout.jpg

homepage-callout.jpg

663 ms

arrow-more.png

arrow-more.png

108 ms

arrow-up.png

arrow-up.png

106 ms

nadpis-realizace.png

nadpis-realizace.png

192 ms

im-scicon-26-3-v1.png

im-scicon-26-3-v1.png

754 ms

im-scicon-26-6-v1.png

im-scicon-26-6-v1.png

745 ms

nadpis-nabidka.png

nadpis-nabidka.png

289 ms

im-scicon-27-19-v1.png

im-scicon-27-19-v1.png

595 ms

im-scicon-27-13-v1.png

im-scicon-27-13-v1.png

663 ms

im-scicon-27-15-v1.png

im-scicon-27-15-v1.png

667 ms

im-scicon-71-174-v2.png

im-scicon-71-174-v2.png

908 ms

im-scicon-72-174-v2.png

im-scicon-72-174-v2.png

859 ms

im-scicon-82-174-v1.png

im-scicon-82-174-v1.png

858 ms

carousel-arrow-right.png

carousel-arrow-right.png

763 ms

carousel-arrow-left.png

carousel-arrow-left.png

839 ms

NjE1Mzg3MDEtcnNmLWxhcmdl.png

NjE1Mzg3MDEtcnNmLWxhcmdl.png

547 ms

partners1.png

partners1.png

847 ms

partners2.png

partners2.png

857 ms

partners3.png

partners3.png

933 ms

partners4.png

partners4.png

943 ms

partners5.png

partners5.png

951 ms

footer-heading.png

footer-heading.png

951 ms

footer-logo.png

footer-logo.png

952 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVQ.woff

49 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4uaVQ.woff

65 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVQ.woff

74 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4uaVQ.woff

74 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1x4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1x4uaVQ.woff

75 ms

linkid.js

linkid.js

29 ms

collect

collect

5 ms

certifikace-firem.html

certifikace-firem.html

108 ms

Accessibility Review

sinai.cz accessibility score

89

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

sinai.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

High

Missing source maps for large first-party JavaScript

SEO Factors

sinai.cz SEO score

91

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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 Sinai.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 Sinai.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

sinai.cz

Open Graph data is detected on the main page of Sinai. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: