Tools & Wizards About Us
prestonpublishing.pl screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

prestonpublishing.pl

Księgarnia językowa online, wydawnictwo językowe | Preston Publishing

Page Load Speed

5.8 sec in total

First Response

367 ms

Resources Loaded

4.5 sec

Page Rendered

921 ms

prestonpublishing.pl screenshot

About Website

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

Poznaj ofertę naszej księgarni językowej online i opanuj z nami nowe języki obce. Preston Publishing to sprawdzone rozwiązania językowe.

Visit prestonpublishing.pl

Key Findings

We analyzed Prestonpublishing.pl page load time and found that the first response time was 367 ms and then it took 5.4 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

prestonpublishing.pl performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

26/100

10%

LCP (Largest Contentful Paint)

Value10.4 s

0/100

25%

SI (Speed Index)

Value7.4 s

27/100

10%

TBT (Total Blocking Time)

Value920 ms

30/100

30%

CLS (Cumulative Layout Shift)

Value0.309

38/100

15%

TTI (Time to Interactive)

Value12.2 s

15/100

10%

Network Requests Diagram

prestonpublishing.pl

367 ms

prestonpublishing.pl

1364 ms

widget.css

47 ms

ruch.css

187 ms

theme-577b0978.css

453 ms

Our browser made a total of 98 requests to load all elements on the main page. We found that 89% of them (87 requests) were addressed to the original Prestonpublishing.pl, 2% (2 requests) were made to Ruch-osm.sysadvisors.pl and 2% (2 requests) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Prestonpublishing.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 556.7 kB (4%)

Content Size

12.6 MB

After Optimization

12.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Prestonpublishing.pl main page is 12.6 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. 70% of websites need less resources to load. Images take 12.2 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 78.3 kB

  • Original 95.8 kB
  • After minification 74.2 kB
  • After compression 17.4 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 21.6 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 78.3 kB or 82% of the original size.

Image Optimization

-4%

Potential reduce by 440.9 kB

  • Original 12.2 MB
  • After minification 11.7 MB

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. Preston Publishing images are well optimized though.

JavaScript Optimization

-11%

Potential reduce by 30.7 kB

  • Original 274.6 kB
  • After minification 273.3 kB
  • After compression 243.9 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 30.7 kB or 11% of the original size.

CSS Optimization

-8%

Potential reduce by 6.8 kB

  • Original 86.2 kB
  • After minification 86.2 kB
  • After compression 79.5 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. Prestonpublishing.pl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 35 (38%)

Requests Now

92

After Optimization

57

  • Images
  • JavaScript
  • CSS

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Preston Publishing. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

prestonpublishing.pl

prestonpublishing.pl

367 ms

prestonpublishing.pl

prestonpublishing.pl

1364 ms

widget.css

widget.css

47 ms

ruch.css

ruch.css

187 ms

theme-577b0978.css

theme-577b0978.css

453 ms

swiper.css

swiper.css

326 ms

style.css

style.css

326 ms

jquery-3.5.1.min.js

jquery-3.5.1.min.js

31 ms

sdk.js

sdk.js

33 ms

core.js

core.js

451 ms

theme.js

theme.js

567 ms

front.js

front.js

355 ms

ps_emailsubscription.js

ps_emailsubscription.js

353 ms

p24_inside.js

p24_inside.js

401 ms

przelewy24Common.js

przelewy24Common.js

469 ms

front.js

front.js

469 ms

jquery.magnific-popup.min.js

jquery.magnific-popup.min.js

564 ms

payu.js

payu.js

564 ms

jquery.rating.pack.js

jquery.rating.pack.js

565 ms

jquery.textareaCounter.plugin.js

jquery.textareaCounter.plugin.js

594 ms

productcomments.js

productcomments.js

593 ms

jquery-ui.min.js

jquery-ui.min.js

728 ms

jquery.growl.js

jquery.growl.js

695 ms

jquery.fancybox.js

jquery.fancybox.js

697 ms

cart.js

cart.js

694 ms

cart17.js

cart17.js

694 ms

widget.js

widget.js

11 ms

responsiveslides.min.js

responsiveslides.min.js

693 ms

homeslider.js

homeslider.js

795 ms

ps_searchbar.js

ps_searchbar.js

794 ms

ps_shoppingcart.js

ps_shoppingcart.js

796 ms

ps_productinfo.js

ps_productinfo.js

808 ms

custom.js

custom.js

807 ms

jquery.min.js

jquery.min.js

17 ms

swiper.min.js

swiper.min.js

851 ms

app.js

app.js

905 ms

css

css

36 ms

preston-publishing-logo-1639419297.jpg

preston-publishing-logo-1639419297.jpg

594 ms

fb84c7b9c9abe3b614d5ce034cb4568db1f149a8_Preston-slider-www-ENG-trening-matura.png

fb84c7b9c9abe3b614d5ce034cb4568db1f149a8_Preston-slider-www-ENG-trening-matura.png

785 ms

d85ddde1276b8464213cf2151212a936e6f6d0ce_Preston-slider-www-mapy-ENG-cz2-premiera.png

d85ddde1276b8464213cf2151212a936e6f6d0ce_Preston-slider-www-mapy-ENG-cz2-premiera.png

892 ms

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7ad4ed98f1356fe9dea999ded138071ff3de2a05_Preston-slider-www-PL-ukr-premiera.png

1096 ms

ef6abc15cdc9b4ade9bd6c947d9674f7dc0b0e08_Preston-slider-www-hiszp-trening-A2B1-premiera-popr3.png

ef6abc15cdc9b4ade9bd6c947d9674f7dc0b0e08_Preston-slider-www-hiszp-trening-A2B1-premiera-popr3.png

749 ms

c69a8f15673e2a548aec3f3c6865bb25cae594e1_Preston-slider-www-FR-mapy-premiera.png

c69a8f15673e2a548aec3f3c6865bb25cae594e1_Preston-slider-www-FR-mapy-premiera.png

1144 ms

95a6713fa92c9a277900ccbb4c6b3cc27090fb84_Preston-slider-www-FR-dla-dzieci-premiera-popr1.png

95a6713fa92c9a277900ccbb4c6b3cc27090fb84_Preston-slider-www-FR-dla-dzieci-premiera-popr1.png

1074 ms

830114c689e324fd495ba11daaffa93a004223fa_Preston-slider-www-niemiecki-trening-A2-premiera.png

830114c689e324fd495ba11daaffa93a004223fa_Preston-slider-www-niemiecki-trening-A2-premiera.png

936 ms

84f05eb7e4422e17a2e454b258ba1acbac0aee1e_Preston-slider-www-guide-to-writing-premiera.png

84f05eb7e4422e17a2e454b258ba1acbac0aee1e_Preston-slider-www-guide-to-writing-premiera.png

996 ms

3a90f92690d8aa7223ab684389a0daed41834ac9_Preston-slider-www-Norweski-365-nowosc-popr2.png

3a90f92690d8aa7223ab684389a0daed41834ac9_Preston-slider-www-Norweski-365-nowosc-popr2.png

1126 ms

0c7b3b26d86356f1356c8aee02e38c643aa929c3_Preston-slider-www-hiszpanski-mapy-premiera-popr1.png

0c7b3b26d86356f1356c8aee02e38c643aa929c3_Preston-slider-www-hiszpanski-mapy-premiera-popr1.png

1104 ms

529aefbf7ceed7009225c2111820eb665270e767_Preston-slider-www-eng-trening-c1-c2-nowosc.png

529aefbf7ceed7009225c2111820eb665270e767_Preston-slider-www-eng-trening-c1-c2-nowosc.png

1249 ms

6e9dc5e7e3192797a7c21aa187da5842c1694915_Preston--slider-www.png

6e9dc5e7e3192797a7c21aa187da5842c1694915_Preston--slider-www.png

1204 ms

gtm.js

gtm.js

181 ms

angielski-trening-maturalny-b2-c1.jpg

angielski-trening-maturalny-b2-c1.jpg

1276 ms

icomoon.ttf

icomoon.ttf

1160 ms

DroidSans.woff

DroidSans.woff

1185 ms

angielski-mapy-jezykowe-czesc-2-b1-c1.jpg

angielski-mapy-jezykowe-czesc-2-b1-c1.jpg

1613 ms

sdk.js

sdk.js

123 ms

u-4X0qWljRw-PfU81xCKCpdpbgZJl6XFpfEd7eA9BIxxkbqDH7ilwg.ttf

u-4X0qWljRw-PfU81xCKCpdpbgZJl6XFpfEd7eA9BIxxkbqDH7ilwg.ttf

66 ms

u-4X0qWljRw-PfU81xCKCpdpbgZJl6XFpfEd7eA9BIxxkV2EH7ilwg.ttf

u-4X0qWljRw-PfU81xCKCpdpbgZJl6XFpfEd7eA9BIxxkV2EH7ilwg.ttf

66 ms

francuski-mapy-jezykowe-a2-b2.jpg

francuski-mapy-jezykowe-a2-b2.jpg

1288 ms

polska-mova-v-perekladi-situaciyi-jezyk-polski-dla-ukraincow-sytuacje.jpg

polska-mova-v-perekladi-situaciyi-jezyk-polski-dla-ukraincow-sytuacje.jpg

1179 ms

francuski-dla-dzieci-zdanie-po-zdaniu.jpg

francuski-dla-dzieci-zdanie-po-zdaniu.jpg

1215 ms

norweski-365-na-kazdy-dzien-a1-a2.jpg

norweski-365-na-kazdy-dzien-a1-a2.jpg

1351 ms

angielski-trening-a1-c2-komplet.jpg

angielski-trening-a1-c2-komplet.jpg

1343 ms

79 ms

hiszpanski-trening-a2.jpg

hiszpanski-trening-a2.jpg

1275 ms

niemiecki-trening-a2.jpg

niemiecki-trening-a2.jpg

1226 ms

angielski-mapy-jezykowe.jpg

angielski-mapy-jezykowe.jpg

1287 ms

angielski-konwersacje-dla-srednio-zaawansowanych.jpg

angielski-konwersacje-dla-srednio-zaawansowanych.jpg

1401 ms

angielski-w-tlumaczeniach-slownictwo-3.jpg

angielski-w-tlumaczeniach-slownictwo-3.jpg

1366 ms

niemiecki-w-tlumaczeniach-slownictwo-1.jpg

niemiecki-w-tlumaczeniach-slownictwo-1.jpg

1438 ms

niemiecki-365-na-kazdy-dzien.jpg

niemiecki-365-na-kazdy-dzien.jpg

1356 ms

angielski-120-konwersacji.jpg

angielski-120-konwersacji.jpg

1407 ms

angielski-w-tlumaczeniach-idiomy.jpg

angielski-w-tlumaczeniach-idiomy.jpg

1401 ms

niemiecki-dla-poczatkujacych.jpg

niemiecki-dla-poczatkujacych.jpg

1432 ms

opanuj-slowka.jpg

opanuj-slowka.jpg

1445 ms

hiszpanski-dla-poczatkujacych-komplet.jpg

hiszpanski-dla-poczatkujacych-komplet.jpg

1514 ms

polska-mova-v-perekladakh-situaciyi-jezyk-polski-dla-ukraincow-sytuacje-ksiazka-e-book.jpg

polska-mova-v-perekladakh-situaciyi-jezyk-polski-dla-ukraincow-sytuacje-ksiazka-e-book.jpg

1453 ms

hiszpanski-trening-a2-b1-ksiazka-e-book.jpg

hiszpanski-trening-a2-b1-ksiazka-e-book.jpg

1344 ms

angielski-mapy-jezykowe-czesc-2-ksiazka-e-book-b1-c1.jpg

angielski-mapy-jezykowe-czesc-2-ksiazka-e-book-b1-c1.jpg

1325 ms

hiszpanski-trening-a2-b1-ksiazka-e-book.jpg

hiszpanski-trening-a2-b1-ksiazka-e-book.jpg

1216 ms

francuski-palcem-po-mapie-zestaw.jpg

francuski-palcem-po-mapie-zestaw.jpg

1222 ms

hiszpanski-palcem-po-mapie-zestaw.jpg

hiszpanski-palcem-po-mapie-zestaw.jpg

1154 ms

angielski-palcem-po-mapie-zestaw.jpg

angielski-palcem-po-mapie-zestaw.jpg

1099 ms

francuski-mapy-jezykowe-a2-b2-ksiazka-e-book.jpg

francuski-mapy-jezykowe-a2-b2-ksiazka-e-book.jpg

1093 ms

niemiecki-trening-a2-ksiazka-e-book.jpg

niemiecki-trening-a2-ksiazka-e-book.jpg

998 ms

angielski-trening-dla-dzieci.jpg

angielski-trening-dla-dzieci.jpg

996 ms

wloski-trening-a1.jpg

wloski-trening-a1.jpg

1034 ms

francuski-trening-a1.jpg

francuski-trening-a1.jpg

1017 ms

5b6b1bfd7154921e6bb1ead0e63f0212.jpg

5b6b1bfd7154921e6bb1ead0e63f0212.jpg

1012 ms

newsletter.svg

newsletter.svg

980 ms

001.png

001.png

997 ms

002.png

002.png

950 ms

004.png

004.png

983 ms

003.png

003.png

928 ms

logo.svg

logo.svg

923 ms

swiper-arrow-left.svg

swiper-arrow-left.svg

916 ms

da9057e9fcfb554337238793f3ed6a1b.jpg

da9057e9fcfb554337238793f3ed6a1b.jpg

852 ms

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9500002cd8bc5929951e59d361c59dcf.jpg

843 ms

Accessibility Review

prestonpublishing.pl accessibility score

91

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

prestonpublishing.pl 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

prestonpublishing.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 Prestonpublishing.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 Prestonpublishing.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

prestonpublishing.pl

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