Tools & Wizards About Us

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

zak.edu.pl

Szkoły policealne, medyczne, LO dla dorosłych, kursy roczne, stacjonarne, online i szkolenia | Żak

Page Load Speed

2.5 sec in total

First Response

266 ms

Resources Loaded

2 sec

Page Rendered

179 ms

About Website

Click here to check amazing Zak content for Poland. Otherwise, check out these important facts you probably never knew about zak.edu.pl

Żak to szkoły policealne, licea oraz kursy dla dorosłych. Jesteśmy dla Was w ponad 80 miastach w Polsce. Sprawdź naszą ofertę edukacyjną!

Visit zak.edu.pl

Key Findings

We analyzed Zak.edu.pl page load time and found that the first response time was 266 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

zak.edu.pl performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

17/100

10%

LCP (Largest Contentful Paint)

Value17.1 s

0/100

25%

SI (Speed Index)

Value9.7 s

10/100

10%

TBT (Total Blocking Time)

Value5,030 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value22.7 s

1/100

10%

Network Requests Diagram

zak.edu.pl

266 ms

zak.edu.pl

648 ms

509765_797c9.js

406 ms

widget.js

40 ms

gtm.js

71 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 71% of them (30 requests) were addressed to the original Zak.edu.pl, 10% (4 requests) were made to Googletagmanager.com and 5% (2 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Zak.edu.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 552.5 kB (61%)

Content Size

905.0 kB

After Optimization

352.5 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Zak.edu.pl main page is 905.0 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. Javascripts take 767.8 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 63.9 kB

  • Original 90.8 kB
  • After minification 90.6 kB
  • After compression 26.9 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 63.9 kB or 70% of the original size.

Image Optimization

-6%

Potential reduce by 3.0 kB

  • Original 46.4 kB
  • After minification 43.4 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. Zak images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 485.6 kB

  • Original 767.8 kB
  • After minification 767.8 kB
  • After compression 282.2 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 485.6 kB or 63% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (59%)

Requests Now

34

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zak. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

zak.edu.pl accessibility score

93

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

Links do not have a discernible name

Best Practices

zak.edu.pl best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

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

zak.edu.pl SEO score

100

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    PL

  • Language Claimed

    PL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zak.edu.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it matches the claimed language. Our system also found out that Zak.edu.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

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