Tools & Wizards About Us
dzwonek.pl screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

dzwonek.pl

Dzwonek.pl - Mobilna Platforma Edukacyjna - LMS - System Zarządzania Nauczaniem

Page Load Speed

1.9 sec in total

First Response

380 ms

Resources Loaded

1.5 sec

Page Rendered

59 ms

dzwonek.pl screenshot

About Website

Visit dzwonek.pl now to see the best up-to-date Dzwonek content for Poland and also check out these interesting facts you probably never knew about dzwonek.pl

Wypróbuj bezpłatnie nasz System Zarządzania Nauczaniem. Dzwonek.pl zapewnia szeroki wybór narzędzi i funkcji, takich jak wirtualne szkoły, bezpłatne Kolekcje, ocenę postępów w czasie rzeczywistym, kla...

Visit dzwonek.pl

Key Findings

We analyzed Dzwonek.pl page load time and found that the first response time was 380 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

dzwonek.pl performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.9 s

1/100

10%

LCP (Largest Contentful Paint)

Value21.9 s

0/100

25%

SI (Speed Index)

Value12.2 s

3/100

10%

TBT (Total Blocking Time)

Value1,710 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value28.3 s

0/100

10%

Network Requests Diagram

www.dzwonek.pl

380 ms

instanceDetection.js

133 ms

mCourserOtAutoBlock.js

123 ms

jQuery-3.3.1.js

99 ms

jQuery-ui-1.12.1.js

144 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that all of those requests were addressed to Dzwonek.pl and no external sources were called. The less responsive or slowest element that took the longest time to load (798 ms) belongs to the original domain Dzwonek.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 530.3 kB (40%)

Content Size

1.3 MB

After Optimization

811.8 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Dzwonek.pl main page is 1.3 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. 35% of websites need less resources to load. Javascripts take 803.8 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 7.6 kB

  • Original 9.7 kB
  • After minification 7.5 kB
  • After compression 2.2 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 2.3 kB, which is 23% 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 7.6 kB or 78% of the original size.

JavaScript Optimization

-34%

Potential reduce by 275.7 kB

  • Original 803.8 kB
  • After minification 803.8 kB
  • After compression 528.1 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 275.7 kB or 34% of the original size.

CSS Optimization

-47%

Potential reduce by 247.0 kB

  • Original 528.6 kB
  • After minification 394.5 kB
  • After compression 281.5 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. Dzwonek.pl needs all CSS files to be minified and compressed as it can save up to 247.0 kB or 47% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (90%)

Requests Now

29

After Optimization

3

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dzwonek. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.dzwonek.pl

www.dzwonek.pl

380 ms

instanceDetection.js

instanceDetection.js

133 ms

mCourserOtAutoBlock.js

mCourserOtAutoBlock.js

123 ms

jQuery-3.3.1.js

jQuery-3.3.1.js

99 ms

jQuery-ui-1.12.1.js

jQuery-ui-1.12.1.js

144 ms

tinymce.min.js

tinymce.min.js

181 ms

theme.min.js

theme.min.js

156 ms

plugin.min.js

plugin.min.js

178 ms

plugin.min.js

plugin.min.js

178 ms

content.min.css

content.min.css

214 ms

skin.min.css

skin.min.css

214 ms

janus.js

janus.js

226 ms

jquery-ui-nestedSortable.js

jquery-ui-nestedSortable.js

269 ms

baseUrls.js

baseUrls.js

230 ms

styles.c7bd5f20f0cac526faa0.css

styles.c7bd5f20f0cac526faa0.css

258 ms

base.styles.e967ab9c6377020b0dcd.css

base.styles.e967ab9c6377020b0dcd.css

364 ms

other-modules.styles.e967ab9c6377020b0dcd.css

other-modules.styles.e967ab9c6377020b0dcd.css

342 ms

lesson.styles.e967ab9c6377020b0dcd.css

lesson.styles.e967ab9c6377020b0dcd.css

323 ms

bq-eventlogger.js

bq-eventlogger.js

332 ms

screen.js

screen.js

362 ms

mCourserOtSDKStub.js

mCourserOtSDKStub.js

389 ms

styles.639154baf70ab41b122b.bundle.js

styles.639154baf70ab41b122b.bundle.js

404 ms

runtime-es2015.a4891c783257ccbd047e.js

runtime-es2015.a4891c783257ccbd047e.js

404 ms

runtime-es5.a4891c783257ccbd047e.js

runtime-es5.a4891c783257ccbd047e.js

444 ms

polyfills-es5.a72d086095a1a62503e6.js

polyfills-es5.a72d086095a1a62503e6.js

458 ms

polyfills-es2015.c2541dc47b8e9078d310.js

polyfills-es2015.c2541dc47b8e9078d310.js

422 ms

scripts.3ece389cfb081d542f0a.js

scripts.3ece389cfb081d542f0a.js

595 ms

main-es2015.071597266c7304c1cd30.js

main-es2015.071597266c7304c1cd30.js

693 ms

main-es5.071597266c7304c1cd30.js

main-es5.071597266c7304c1cd30.js

798 ms

5644499755728896

5644499755728896

361 ms

Accessibility Review

dzwonek.pl accessibility score

96

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

<frame> or <iframe> elements do not have a title

Best Practices

dzwonek.pl 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

dzwonek.pl SEO score

75

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

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

    PL

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dzwonek.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it does not match the claimed English language. Our system also found out that Dzwonek.pl 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

dzwonek.pl

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