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tele3.cz screenshot

Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

tele3.cz

TELE3 | registrace domén | webhosting | virtuální servery

Page Load Speed

3.1 sec in total

First Response

342 ms

Resources Loaded

2.6 sec

Page Rendered

88 ms

tele3.cz screenshot

About Website

Click here to check amazing TELE3 content for Czech Republic. Otherwise, check out these important facts you probably never knew about tele3.cz

Komplexní internetová řešení od TELE3 - registrace domén, webhosting, serverhosting, VPS, virtuální servery, správa serveru, SSL certifikáty, VoIP

Visit tele3.cz

Key Findings

We analyzed Tele3.cz page load time and found that the first response time was 342 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

tele3.cz performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

33/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value7.6 s

26/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value6.3 s

60/100

10%

Network Requests Diagram

tele3.cz

342 ms

tele3.cz

436 ms

www.tele3.cz

573 ms

alertify.core.css

110 ms

alertify.default.css

218 ms

Our browser made a total of 55 requests to load all elements on the main page. We found that all of those requests were addressed to Tele3.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (718 ms) belongs to the original domain Tele3.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 18.9 kB (12%)

Content Size

163.1 kB

After Optimization

144.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tele3.cz main page is 163.1 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. 20% of websites need less resources to load. Images take 79.9 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 11.4 kB

  • Original 15.5 kB
  • After minification 14.5 kB
  • After compression 4.1 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 11.4 kB or 74% of the original size.

Image Optimization

-2%

Potential reduce by 1.8 kB

  • Original 79.9 kB
  • After minification 78.1 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. TELE3 images are well optimized though.

JavaScript Optimization

-7%

Potential reduce by 4.0 kB

  • Original 59.4 kB
  • After minification 59.4 kB
  • After compression 55.5 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

-20%

Potential reduce by 1.7 kB

  • Original 8.4 kB
  • After minification 8.4 kB
  • After compression 6.7 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. Tele3.cz needs all CSS files to be minified and compressed as it can save up to 1.7 kB or 20% of the original size.

Requests Breakdown

Number of requests can be reduced by 35 (67%)

Requests Now

52

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TELE3. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tele3.cz

tele3.cz

342 ms

tele3.cz

tele3.cz

436 ms

www.tele3.cz

www.tele3.cz

573 ms

alertify.core.css

alertify.core.css

110 ms

alertify.default.css

alertify.default.css

218 ms

style.css

style.css

317 ms

awesomplete.css

awesomplete.css

320 ms

jqueryslidemenu.css

jqueryslidemenu.css

321 ms

lightbox.css

lightbox.css

321 ms

jquery-2.1.4.min.js

jquery-2.1.4.min.js

434 ms

alertify.min.js

alertify.min.js

327 ms

jquery.cycle.all.min.js

jquery.cycle.all.min.js

422 ms

jquery.limitkeypress.min.js

jquery.limitkeypress.min.js

425 ms

jquery.functions7.js

jquery.functions7.js

425 ms

jqueryslidemenu.js

jqueryslidemenu.js

426 ms

awesomplete.js

awesomplete.js

445 ms

functions1.js

functions1.js

527 ms

lightbox.js

lightbox.js

548 ms

jquery.functions8.js

jquery.functions8.js

548 ms

logo.jpg

logo.jpg

109 ms

mezlog.gif

mezlog.gif

107 ms

bg-login.png

bg-login.png

108 ms

mezpwd.gif

mezpwd.gif

106 ms

mojeID-login.png

mojeID-login.png

109 ms

nakupni-kosik-1.png

nakupni-kosik-1.png

107 ms

youtube.png

youtube.png

210 ms

linkedin.png

linkedin.png

213 ms

facebook.png

facebook.png

213 ms

twitter.png

twitter.png

214 ms

rss.png

rss.png

215 ms

bgm.gif

bgm.gif

217 ms

kvalitni-webhosting.jpg

kvalitni-webhosting.jpg

524 ms

bg-osobni.jpg

bg-osobni.jpg

318 ms

bg-firemni.jpg

bg-firemni.jpg

319 ms

bg-domaineri.jpg

bg-domaineri.jpg

319 ms

bgpata.jpg

bgpata.jpg

322 ms

fio.jpg

fio.jpg

324 ms

rb.jpg

rb.jpg

424 ms

qr-platby.jpg

qr-platby.jpg

425 ms

visa.jpg

visa.jpg

426 ms

mastercard.jpg

mastercard.jpg

429 ms

ipv6.jpg

ipv6.jpg

432 ms

dnssec.jpg

dnssec.jpg

531 ms

suntech.jpg

suntech.jpg

531 ms

debian-server.jpg

debian-server.jpg

531 ms

ubuntu-server.jpg

ubuntu-server.jpg

535 ms

proxmox.jpg

proxmox.jpg

540 ms

cz-nic.jpg

cz-nic.jpg

628 ms

cisco-ccna.jpg

cisco-ccna.jpg

636 ms

down.gif

down.gif

614 ms

right.gif

right.gif

614 ms

prev.png

prev.png

620 ms

next.png

next.png

625 ms

loading.gif

loading.gif

710 ms

close.png

close.png

718 ms

Accessibility Review

tele3.cz accessibility score

65

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

Form elements do not have associated labels

Best Practices

tele3.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

SEO Factors

tele3.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 Tele3.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 Tele3.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

tele3.cz

Open Graph description is not detected on the main page of TELE3. 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: