Tools & Wizards About Us
kostrzewa.com.pl screenshot

Report Summary

  • 41

    Performance

    Renders faster than
    60% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

kostrzewa.com.pl

KOSTRZEWA - Lider Kotłów na Pellet. Piec na Pellet i Drewno, Pompa ciepła - Nowość. Najtańsze ogrzewanie domu 2023.

Page Load Speed

5.8 sec in total

First Response

314 ms

Resources Loaded

3.9 sec

Page Rendered

1.6 sec

kostrzewa.com.pl screenshot

About Website

Welcome to kostrzewa.com.pl homepage info - get ready to check KOSTRZEWA Com best content right away, or after learning these important things about kostrzewa.com.pl

Obniż Koszty Ogrzewania - Polski Producent Kotłów Elektrycznych, Wysokotemperaturowych Pomp Ciepła (Propan), Kotłów na Pellet i Drewno. Bezpłatne Doradztwo Energetyczne. Wymień Stary Piec w Programie ...

Visit kostrzewa.com.pl

Key Findings

We analyzed Kostrzewa.com.pl page load time and found that the first response time was 314 ms and then it took 5.5 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

kostrzewa.com.pl performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

9/100

10%

LCP (Largest Contentful Paint)

Value11.4 s

0/100

25%

SI (Speed Index)

Value7.2 s

29/100

10%

TBT (Total Blocking Time)

Value500 ms

58/100

30%

CLS (Cumulative Layout Shift)

Value0.052

98/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

kostrzewa.com.pl

314 ms

www.kostrzewa.com.pl

624 ms

css

37 ms

lity.css

133 ms

bulma-0.9.0.min.css

400 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 84% of them (48 requests) were addressed to the original Kostrzewa.com.pl, 5% (3 requests) were made to Cdn.jsdelivr.net and 5% (3 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (2.4 sec) belongs to the original domain Kostrzewa.com.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 50.7 kB (3%)

Content Size

1.8 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kostrzewa.com.pl main page is 1.8 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. 50% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 42.5 kB

  • Original 53.4 kB
  • After minification 47.5 kB
  • After compression 10.8 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 5.9 kB, which is 11% 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 42.5 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 7.7 kB

  • Original 1.7 MB
  • After minification 1.7 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. KOSTRZEWA Com images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 42 B

  • Original 55.5 kB
  • After minification 55.5 kB
  • After compression 55.4 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

-1%

Potential reduce by 425 B

  • Original 36.6 kB
  • After minification 36.6 kB
  • After compression 36.2 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. Kostrzewa.com.pl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 24 (48%)

Requests Now

50

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 50 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KOSTRZEWA Com. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

kostrzewa.com.pl

kostrzewa.com.pl

314 ms

www.kostrzewa.com.pl

www.kostrzewa.com.pl

624 ms

css

css

37 ms

lity.css

lity.css

133 ms

bulma-0.9.0.min.css

bulma-0.9.0.min.css

400 ms

slick.css

slick.css

396 ms

slick-theme.css

slick-theme.css

397 ms

kostrzewa.css

kostrzewa.css

398 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

531 ms

modernizr-custom.js

modernizr-custom.js

443 ms

slick.min.js

slick.min.js

528 ms

lity.min.js

lity.min.js

528 ms

kostrzewa.js

kostrzewa.js

530 ms

jquery.countdown.min.js

jquery.countdown.min.js

530 ms

jquery.lazy.min.js

jquery.lazy.min.js

575 ms

cookiebar-latest.min.js

cookiebar-latest.min.js

20 ms

js

js

81 ms

gtm.js

gtm.js

170 ms

cookiebar-momh.min.css

cookiebar-momh.min.css

142 ms

en.html

en.html

149 ms

PL.png

PL.png

234 ms

EN.png

EN.png

234 ms

UA.png

UA.png

235 ms

LT.png

LT.png

234 ms

DE.png

DE.png

235 ms

FR.png

FR.png

235 ms

youtube.png

youtube.png

341 ms

twitter.png

twitter.png

342 ms

facebook.png

facebook.png

342 ms

mobile-phone-black.png

mobile-phone-black.png

343 ms

globe-black.png

globe-black.png

343 ms

clock-black.png

clock-black.png

343 ms

trolley-empty-black.png

trolley-empty-black.png

473 ms

kostrzewa-logo-pl.png

kostrzewa-logo-pl.png

474 ms

2024_05_21_kostrzewa_slider_2000x600_cta_1.jpg

2024_05_21_kostrzewa_slider_2000x600_cta_1.jpg

2368 ms

ue-pl.png

ue-pl.png

474 ms

40lat_produkujemy_w_polsce.jpg

40lat_produkujemy_w_polsce.jpg

737 ms

kef1awj2.jpg

kef1awj2.jpg

1048 ms

2wn64g2w.jpg

2wn64g2w.jpg

736 ms

f27s0e8f.jpg

f27s0e8f.jpg

868 ms

h6tuo08f.jpg

h6tuo08f.jpg

739 ms

r0co7q6d.jpg

r0co7q6d.jpg

870 ms

2ol0xaja.jpg

2ol0xaja.jpg

870 ms

f9npy6mt.jpg

f9npy6mt.jpg

1002 ms

q95eai9x.jpg

q95eai9x.jpg

1130 ms

phmjs5xw.jpg

phmjs5xw.jpg

1002 ms

kjhryyd7.jpg

kjhryyd7.jpg

1002 ms

kostrzewa-logo-footer-pl.png

kostrzewa-logo-footer-pl.png

1134 ms

contact.png

contact.png

1133 ms

envelope.png

envelope.png

1134 ms

download.png

download.png

1179 ms

globe.png

globe.png

1263 ms

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtr6Hw5aX8.ttf

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtr6Hw5aX8.ttf

53 ms

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCu173w5aX8.ttf

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCu173w5aX8.ttf

59 ms

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCvC73w5aX8.ttf

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCvC73w5aX8.ttf

86 ms

Helvetica-Narrow-Bold.woff

Helvetica-Narrow-Bold.woff

1150 ms

Helvetica-Narrow.woff

Helvetica-Narrow.woff

1156 ms

Accessibility Review

kostrzewa.com.pl accessibility score

90

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

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

kostrzewa.com.pl best practices score

83

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

SEO Factors

kostrzewa.com.pl SEO score

83

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

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 Kostrzewa.com.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 Kostrzewa.com.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

kostrzewa.com.pl

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