Tools & Wizards About Us
tridnistranky.cz screenshot

Report Summary

  • 75

    Performance

    Renders faster than
    83% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

tridnistranky.cz

Třídní stránky jednoduše a zdarma | TřídníStránky.cz

Page Load Speed

1.4 sec in total

First Response

107 ms

Resources Loaded

917 ms

Page Rendered

378 ms

tridnistranky.cz screenshot

About Website

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

TřídníStránky.cz jsou určeny všem učitelům a jejich třídám. Velmi usnadňují jejich vzájemnou komunikaci.

Visit tridnistranky.cz

Key Findings

We analyzed Tridnistranky.cz page load time and found that the first response time was 107 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

tridnistranky.cz performance score

75

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

75/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

28/100

25%

SI (Speed Index)

Value3.3 s

90/100

10%

TBT (Total Blocking Time)

Value190 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.032

100/100

15%

TTI (Time to Interactive)

Value3.9 s

88/100

10%

Network Requests Diagram

tridnistranky.cz

107 ms

bootstrap_index.css

106 ms

bootstrap-responsive.css

176 ms

font-awesome.css

63 ms

jquery-ui-1.10.1.custom.css

194 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 11% of them (3 requests) were addressed to the original Tridnistranky.cz, 85% (23 requests) were made to 20240822t124453-dot-tridnistranky2.appspot.com and 4% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (389 ms) relates to the external source 20240822t124453-dot-tridnistranky2.appspot.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 96.7 kB (13%)

Content Size

770.1 kB

After Optimization

673.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tridnistranky.cz main page is 770.1 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. 40% of websites need less resources to load. Images take 530.6 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 19.8 kB

  • Original 24.2 kB
  • After minification 15.6 kB
  • After compression 4.4 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. This page needs HTML code to be minified as it can gain 8.6 kB, which is 36% 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 19.8 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 16.1 kB

  • Original 530.6 kB
  • After minification 514.5 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. Tridnistranky images are well optimized though.

JavaScript Optimization

-31%

Potential reduce by 48.8 kB

  • Original 157.9 kB
  • After minification 157.9 kB
  • After compression 109.1 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 48.8 kB or 31% of the original size.

CSS Optimization

-21%

Potential reduce by 11.9 kB

  • Original 57.4 kB
  • After minification 57.4 kB
  • After compression 45.5 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. Tridnistranky.cz needs all CSS files to be minified and compressed as it can save up to 11.9 kB or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (52%)

Requests Now

25

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tridnistranky. 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 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tridnistranky.cz

tridnistranky.cz

107 ms

bootstrap_index.css

bootstrap_index.css

106 ms

bootstrap-responsive.css

bootstrap-responsive.css

176 ms

font-awesome.css

font-awesome.css

63 ms

jquery-ui-1.10.1.custom.css

jquery-ui-1.10.1.custom.css

194 ms

theme.css

theme.css

209 ms

external-pages.css

external-pages.css

195 ms

animate.css

animate.css

188 ms

jquery-1.9.1.js

jquery-1.9.1.js

348 ms

jquery.validate.js

jquery.validate.js

363 ms

bootstrap.js

bootstrap.js

366 ms

jquery-ui-1.10.2.custom.js

jquery-ui-1.10.2.custom.js

372 ms

json.js

json.js

371 ms

tools.js

tools.js

365 ms

theme.js

theme.js

389 ms

js

js

70 ms

content_bg.jpg

content_bg.jpg

170 ms

nav_bg.jpg

nav_bg.jpg

151 ms

ts-logo.png

ts-logo.png

181 ms

slide1.png

slide1.png

221 ms

slide2.png

slide2.png

300 ms

slide3.png

slide3.png

168 ms

features_icons_bg.png

features_icons_bg.png

224 ms

chart1.png

chart1.png

230 ms

chart2.png

chart2.png

218 ms

footer_bg.jpg

footer_bg.jpg

210 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

91 ms

Accessibility Review

tridnistranky.cz accessibility score

95

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

tridnistranky.cz best practices score

75

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

tridnistranky.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

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tridnistranky.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Tridnistranky.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

tridnistranky.cz

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