Tools & Wizards About Us
chemieseite.de screenshot

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

chemieseite.de

Chemie im Allgemeinen, Anorganik, Organik und Hauptelemente ::: Chemieseite.de

Page Load Speed

2.6 sec in total

First Response

284 ms

Resources Loaded

2.2 sec

Page Rendered

128 ms

chemieseite.de screenshot

About Website

Welcome to chemieseite.de homepage info - get ready to check Chemieseite best content for Germany right away, or after learning these important things about chemieseite.de

Chemie im Allgemeinen, Anorganik, Organik sowie Besprechung der Hauptelemente. Eine Webseite für Studenten und Schüler, die ein kompaktes Wissen zum Fach Chemie benötigen.

Visit chemieseite.de

Key Findings

We analyzed Chemieseite.de page load time and found that the first response time was 284 ms and then it took 2.3 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

chemieseite.de performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

22/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value2,300 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.074

95/100

15%

TTI (Time to Interactive)

Value11.7 s

18/100

10%

Network Requests Diagram

chemieseite.de

284 ms

www.chemieseite.de

233 ms

www.chemieseite.de

501 ms

standardstyle.css

159 ms

css

39 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 65% of them (17 requests) were addressed to the original Chemieseite.de, 12% (3 requests) were made to Pagead2.googlesyndication.com and 4% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (615 ms) belongs to the original domain Chemieseite.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 131.3 kB (23%)

Content Size

575.2 kB

After Optimization

443.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemieseite.de main page is 575.2 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. 25% of websites need less resources to load. Javascripts take 401.1 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 9.6 kB

  • Original 13.0 kB
  • After minification 12.2 kB
  • After compression 3.4 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. 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 9.6 kB or 74% of the original size.

Image Optimization

-0%

Potential reduce by 38 B

  • Original 140.9 kB
  • After minification 140.9 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. Chemieseite images are well optimized though.

JavaScript Optimization

-26%

Potential reduce by 104.0 kB

  • Original 401.1 kB
  • After minification 368.5 kB
  • After compression 297.0 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 104.0 kB or 26% of the original size.

CSS Optimization

-87%

Potential reduce by 17.6 kB

  • Original 20.2 kB
  • After minification 16.6 kB
  • After compression 2.7 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. Chemieseite.de needs all CSS files to be minified and compressed as it can save up to 17.6 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (43%)

Requests Now

21

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemieseite. 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 as a result speed up the page load time.

Network Requests Diagram

chemieseite.de

chemieseite.de

284 ms

www.chemieseite.de

www.chemieseite.de

233 ms

www.chemieseite.de

www.chemieseite.de

501 ms

standardstyle.css

standardstyle.css

159 ms

css

css

39 ms

json2.js

json2.js

318 ms

jquery-1.9.1.min.js

jquery-1.9.1.min.js

615 ms

jstorage.js

jstorage.js

442 ms

counter.js

counter.js

323 ms

animation.js

animation.js

327 ms

show_ads.js

show_ads.js

89 ms

adsbygoogle.js

adsbygoogle.js

187 ms

brand

brand

30 ms

js

js

71 ms

brandjs.js

brandjs.js

16 ms

subtle-white-feathers-pngquant.png

subtle-white-feathers-pngquant.png

327 ms

wasser_first_komprimiert2.png

wasser_first_komprimiert2.png

120 ms

transparentespixel.gif

transparentespixel.gif

120 ms

allgemeineChemie.jpg

allgemeineChemie.jpg

165 ms

anorganischeChemie.jpg

anorganischeChemie.jpg

120 ms

organischeChemie.jpg

organischeChemie.jpg

166 ms

hauptelemente.jpg

hauptelemente.jpg

245 ms

7cH1v4okm5zmbvwkAx_sfcEuiD8jPvWsOdC6.ttf

7cH1v4okm5zmbvwkAx_sfcEuiD8jPvWsOdC6.ttf

72 ms

show_ads_impl.js

show_ads_impl.js

382 ms

branding.png

branding.png

58 ms

counter.php

counter.php

201 ms

Accessibility Review

chemieseite.de accessibility score

77

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Form elements do not have associated labels

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

chemieseite.de 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

High

Page has valid source maps

SEO Factors

chemieseite.de SEO score

98

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemieseite.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Chemieseite.de 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

chemieseite.de

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