Access swiatchemii.pl. Portal Chemiczny - Świat Chemii

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value7.2 s

5/100

25%

SI (Speed Index)

Value11.1 s

5/100

10%

TBT (Total Blocking Time)

Value8,910 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.227

55/100

15%

TTI (Time to Interactive)

Value20.9 s

2/100

10%

swiatchemii.pl

480 ms

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103 ms

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185 ms

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191 ms

css_PO55gZM1ATdo3PHG6NsmuqOY0kR4vv4JYH5lXHX8GN4.css

189 ms

Our browser made a total of 53 requests to load all elements on the main page. We found that 58% of them (31 requests) were addressed to the original Swiatchemii.pl, 19% (10 requests) were made to Static.xx.fbcdn.net and 15% (8 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (566 ms) belongs to the original domain Swiatchemii.pl.

Content Size

913.2 kB

After Optimization

659.2 kB

In fact, the total size of Swiatchemii.pl main page is 913.2 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. 35% of websites need less resources to load. Images take 624.1 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 43.7 kB

Original 55.5 kB
After minification 50.3 kB
After compression 11.8 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. 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 43.7 kB or 79% of the original size.

Image Optimization

-4%

Potential reduce by 28.1 kB

Original 624.1 kB
After minification 596.0 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. Swiat Chemii images are well optimized though.

JavaScript Optimization

-78%

Potential reduce by 132.6 kB

Original 169.8 kB
After minification 125.5 kB
After compression 37.2 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 132.6 kB or 78% of the original size.

CSS Optimization

-78%

Potential reduce by 49.7 kB

Original 63.8 kB
After minification 62.1 kB
After compression 14.1 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. Swiatchemii.pl needs all CSS files to be minified and compressed as it can save up to 49.7 kB or 78% of the original size.

Requests Now

After Optimization

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Swiat Chemii. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

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

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

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/).

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 Swiatchemii.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 Swiatchemii.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

swiatchemii.pl

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Portal Chemiczny - Świat Chemii | Chemia to Twój świat

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

swiatchemii.pl

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

css_vZ_wrMQ9Og-YPPxa1q4us3N7DsZMJa-14jShHgRoRNo.css

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css_PO55gZM1ATdo3PHG6NsmuqOY0kR4vv4JYH5lXHX8GN4.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

swiatchemii.pl

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