Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 67% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

defro.pl

Defro - czyste ciepło

Page Load Speed

6.2 sec in total

First Response

506 ms

Resources Loaded

5.4 sec

Page Rendered

288 ms

defro.pl screenshot

About Website

Welcome to defro.pl homepage info - get ready to check Defro best content for Poland right away, or after learning these important things about defro.pl

Wysokiej jakości urządzenia grzewcze: pompy ciepła, kotły na pellet, ekogroszek, gaz, rekuperatory. Nowoczesne i wydajne, dopasowane do Twojego domu.

Visit defro.pl

Key Findings

We analyzed Defro.pl page load time and found that the first response time was 506 ms and then it took 5.7 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

defro.pl performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

36/100

10%

LCP (Largest Contentful Paint)

Value12.0 s

0/100

25%

SI (Speed Index)

Value8.4 s

19/100

10%

TBT (Total Blocking Time)

Value890 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value1.593

0/100

15%

TTI (Time to Interactive)

Value13.9 s

10/100

10%

Network Requests Diagram

defro.pl

506 ms

www.defro.pl

892 ms

analytics.js

22 ms

sdk.js

151 ms

logo-mobile.png

286 ms

Our browser made a total of 109 requests to load all elements on the main page. We found that 76% of them (83 requests) were addressed to the original Defro.pl, 9% (10 requests) were made to Static.xx.fbcdn.net and 7% (8 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (3.2 sec) belongs to the original domain Defro.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (31%)

Content Size

3.6 MB

After Optimization

2.5 MB

In fact, the total size of Defro.pl main page is 3.6 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. 45% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 76.0 kB

  • Original 90.7 kB
  • After minification 88.8 kB
  • After compression 14.7 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 76.0 kB or 84% of the original size.

Image Optimization

-11%

Potential reduce by 283.9 kB

  • Original 2.5 MB
  • After minification 2.2 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. Obviously, Defro needs image optimization as it can save up to 283.9 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-70%

Potential reduce by 395.2 kB

  • Original 561.8 kB
  • After minification 561.8 kB
  • After compression 166.6 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 395.2 kB or 70% of the original size.

CSS Optimization

-84%

Potential reduce by 349.6 kB

  • Original 418.4 kB
  • After minification 410.1 kB
  • After compression 68.8 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. Defro.pl needs all CSS files to be minified and compressed as it can save up to 349.6 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (16%)

Requests Now

106

After Optimization

89

The browser has sent 106 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Defro. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

defro.pl accessibility score

87

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

defro.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

SEO Factors

defro.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

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

    PL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Defro.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 Defro.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 Defro. 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: