Tools & Wizards About Us
t-mobile.cz screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

t-mobile.cz

Spolehlivý operátor pro mobilní i pevné služby - T-Mobile.cz

Page Load Speed

5.6 sec in total

First Response

444 ms

Resources Loaded

4.7 sec

Page Rendered

505 ms

t-mobile.cz screenshot

About Website

Click here to check amazing T Mobile content for Czech Republic. Otherwise, check out these important facts you probably never knew about t-mobile.cz

U nás pořídíte tarifní řešení pro celou domácnost - neomezené volání, mobilní data, domácí internet i digitální TV. Výhodně v Magentě 1.

Visit t-mobile.cz

Key Findings

We analyzed T-mobile.cz page load time and found that the first response time was 444 ms and then it took 5.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

t-mobile.cz performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.7 s

0/100

10%

LCP (Largest Contentful Paint)

Value26.3 s

0/100

25%

SI (Speed Index)

Value18.6 s

0/100

10%

TBT (Total Blocking Time)

Value5,380 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.017

100/100

15%

TTI (Time to Interactive)

Value27.5 s

0/100

10%

Network Requests Diagram

t-mobile.cz

444 ms

osobni

351 ms

custom.css

694 ms

critical.css

595 ms

cookies-blocker.min.js

456 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 23% of them (14 requests) were addressed to the original T-mobile.cz, 50% (30 requests) were made to Static2.t-mobile.cz and 13% (8 requests) were made to Cdn.t-mobile.cz. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Cdn.t-mobile.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 593.9 kB (42%)

Content Size

1.4 MB

After Optimization

814.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of T-mobile.cz main page is 1.4 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. 55% of websites need less resources to load. CSS take 636.2 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 147.3 kB

  • Original 181.4 kB
  • After minification 154.4 kB
  • After compression 34.2 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 27.0 kB, which is 15% 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 147.3 kB or 81% of the original size.

Image Optimization

-1%

Potential reduce by 1.6 kB

  • Original 240.5 kB
  • After minification 238.9 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. T Mobile images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 6.2 kB

  • Original 349.9 kB
  • After minification 349.9 kB
  • After compression 343.7 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

-69%

Potential reduce by 438.9 kB

  • Original 636.2 kB
  • After minification 630.0 kB
  • After compression 197.3 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. T-mobile.cz needs all CSS files to be minified and compressed as it can save up to 438.9 kB or 69% of the original size.

Requests Breakdown

Number of requests can be reduced by 41 (79%)

Requests Now

52

After Optimization

11

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of T Mobile. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and from 15 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

t-mobile.cz

t-mobile.cz

444 ms

osobni

osobni

351 ms

custom.css

custom.css

694 ms

critical.css

critical.css

595 ms

cookies-blocker.min.js

cookies-blocker.min.js

456 ms

cookies-checker.min.js

cookies-checker.min.js

460 ms

jquery-1.11.2.js

jquery-1.11.2.js

795 ms

libs.js

libs.js

794 ms

barebone.jsp

barebone.jsp

1024 ms

lead-api.min.js

lead-api.min.js

459 ms

vue-axios.min.js

vue-axios.min.js

639 ms

polyfill-functions.js

polyfill-functions.js

589 ms

ajaxUI.js

ajaxUI.js

728 ms

main.js

main.js

729 ms

navigation.js

navigation.js

828 ms

custom-child.css

custom-child.css

1482 ms

lcp-style.css

lcp-style.css

152 ms

lcp-script.js

lcp-script.js

267 ms

lcp-float-style.css

lcp-float-style.css

327 ms

lcp-float-script.js

lcp-float-script.js

299 ms

portletStore.js

portletStore.js

701 ms

minicart.js

minicart.js

699 ms

ext.js

ext.js

780 ms

main.js

main.js

784 ms

main.js

main.js

806 ms

main.js

main.js

807 ms

upload.js

upload.js

811 ms

main.js

main.js

956 ms

main-child.js

main-child.js

1130 ms

useberryScript.js

useberryScript.js

403 ms

main.css

main.css

123 ms

vue.css

vue.css

121 ms

main.css

main.css

119 ms

ext.css

ext.css

119 ms

gtm.js

gtm.js

174 ms

Samsung-Galaxy-A05s-64GB-cerny-detail-big01.jpg

Samsung-Galaxy-A05s-64GB-cerny-detail-big01.jpg

325 ms

Xiaomi-Redmi-13C-5G-128GB-cerny-detail-big01.jpg

Xiaomi-Redmi-13C-5G-128GB-cerny-detail-big01.jpg

385 ms

Motorola-Moto-G54-5G-Power-Edition-tmavomodry-detail-big01.jpg

Motorola-Moto-G54-5G-Power-Edition-tmavomodry-detail-big01.jpg

385 ms

iPhone-13-SE-sedy-detail-big01.jpg

iPhone-13-SE-sedy-detail-big01.jpg

324 ms

iPhone_15_Plus_Pink-detail-big01.jpg

iPhone_15_Plus_Pink-detail-big01.jpg

733 ms

teleneo-regular.woff

teleneo-regular.woff

354 ms

teleneo-regular.woff

teleneo-regular.woff

353 ms

teleneo-extrabold.woff

teleneo-extrabold.woff

132 ms

teleneo-extrabold.woff

teleneo-extrabold.woff

702 ms

main.css

main.css

134 ms

teleneo-bold.woff

teleneo-bold.woff

220 ms

teleneo-bold.woff

teleneo-bold.woff

461 ms

main.css

main.css

148 ms

loadNumberOfItems

loadNumberOfItems

193 ms

main.css

main.css

171 ms

bounce

bounce

106 ms

152 ms

osobni

osobni

171 ms

sbounce

sbounce

60 ms

118 ms

available_languages.jsp

available_languages.jsp

115 ms

116 ms

main.css

main.css

121 ms

main.css

main.css

120 ms

main.css

main.css

120 ms

Accessibility Review

t-mobile.cz accessibility score

56

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[aria-*] attributes do not have valid values

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

Buttons do not have an accessible name

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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>).

Best Practices

t-mobile.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

t-mobile.cz SEO score

84

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 T-mobile.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 T-mobile.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

t-mobile.cz

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