Tools & Wizards About Us
experimentalchemie.de screenshot

Report Summary

  • 95

    Performance

    Renders faster than
    93% of other websites

  • 48

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

experimentalchemie.de

Experimentalchemie.de - Chemische Versuche, detaillierte Anleitung ,Show Experimente, Chemikalien, Sicherheit, Links

Page Load Speed

2.1 sec in total

First Response

288 ms

Resources Loaded

1.7 sec

Page Rendered

118 ms

experimentalchemie.de screenshot

About Website

Click here to check amazing Experimentalchemie content for Germany. Otherwise, check out these important facts you probably never knew about experimentalchemie.de

Chemische Experimente mit Versuchsanleitungen...für Unterricht,Studium und zu Showzwecken! Mit detailierten Sicherheits- und Entsorgungshinweisen sowie Notfallmaßnahmen. Versuche zu allen Bereichen de...

Visit experimentalchemie.de

Key Findings

We analyzed Experimentalchemie.de page load time and found that the first response time was 288 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

experimentalchemie.de performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

78/100

10%

LCP (Largest Contentful Paint)

Value2.2 s

95/100

25%

SI (Speed Index)

Value2.3 s

99/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.083

93/100

15%

TTI (Time to Interactive)

Value2.6 s

98/100

10%

Network Requests Diagram

experimentalchemie.de

288 ms

experimentalchemie.de

381 ms

experimentalchemie.css

90 ms

brand

8 ms

brandjs.js

20 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 91% of them (51 requests) were addressed to the original Experimentalchemie.de, 4% (2 requests) were made to Google.com and 4% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (714 ms) belongs to the original domain Experimentalchemie.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 23.8 kB (15%)

Content Size

156.4 kB

After Optimization

132.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Experimentalchemie.de main page is 156.4 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. 20% of websites need less resources to load. Images take 106.0 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 21.7 kB

  • Original 27.0 kB
  • After minification 24.1 kB
  • After compression 5.2 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 21.7 kB or 81% of the original size.

Image Optimization

-2%

Potential reduce by 1.8 kB

  • Original 106.0 kB
  • After minification 104.2 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. Experimentalchemie images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 174 B

  • Original 23.0 kB
  • After minification 23.0 kB
  • After compression 22.8 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

-22%

Potential reduce by 108 B

  • Original 489 B
  • After minification 489 B
  • After compression 381 B

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. Experimentalchemie.de needs all CSS files to be minified and compressed as it can save up to 108 B or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (22%)

Requests Now

49

After Optimization

38

  • Images
  • JavaScript
  • CSS

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Experimentalchemie. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

experimentalchemie.de

experimentalchemie.de

288 ms

experimentalchemie.de

experimentalchemie.de

381 ms

experimentalchemie.css

experimentalchemie.css

90 ms

brand

brand

8 ms

brandjs.js

brandjs.js

20 ms

ga.js

ga.js

28 ms

ueberschrift.jpg

ueberschrift.jpg

89 ms

eckelinks.gif

eckelinks.gif

177 ms

verlaufoben%2B.gif

verlaufoben%2B.gif

265 ms

versuche-s.gif

versuche-s.gif

268 ms

chemikalien-s.gif

chemikalien-s.gif

266 ms

labor-s.gif

labor-s.gif

266 ms

sicherheit-s.gif

sicherheit-s.gif

270 ms

shop-s.gif

shop-s.gif

269 ms

community-s.gif

community-s.gif

359 ms

links-s.gif

links-s.gif

361 ms

eckerechts.gif

eckerechts.gif

360 ms

verlaufoben.gif

verlaufoben.gif

360 ms

periodensystem-s.gif

periodensystem-s.gif

360 ms

sicherheitscheck-s.gif

sicherheitscheck-s.gif

360 ms

disclaimer-s.gif

disclaimer-s.gif

448 ms

suche-s.gif

suche-s.gif

447 ms

verlauflinks.gif

verlauflinks.gif

446 ms

vdm-stern.jpg

vdm-stern.jpg

448 ms

chemie-erleben.gif

chemie-erleben.gif

449 ms

shop-teaser.jpg

shop-teaser.jpg

449 ms

twitter-bird.png

twitter-bird.png

536 ms

button-alltagschemie.jpg

button-alltagschemie.jpg

536 ms

button-shop.jpg

button-shop.jpg

538 ms

button-praktiken.jpg

button-praktiken.jpg

537 ms

button-videos.jpg

button-videos.jpg

539 ms

button-pse.jpg

button-pse.jpg

538 ms

trennstrich.gif

trennstrich.gif

623 ms

versuche.gif

versuche.gif

624 ms

chemikalien.gif

chemikalien.gif

625 ms

labor.gif

labor.gif

625 ms

sicherheit.gif

sicherheit.gif

626 ms

shop.gif

shop.gif

627 ms

community.gif

community.gif

711 ms

links.gif

links.gif

713 ms

newsletter.jpg

newsletter.jpg

714 ms

branding.png

branding.png

54 ms

unclesamklein.jpg

unclesamklein.jpg

714 ms

__utm.gif

__utm.gif

13 ms

home.gif

home.gif

634 ms

disclaimer.gif

disclaimer.gif

546 ms

email.gif

email.gif

540 ms

flagge_brit_kl.gif

flagge_brit_kl.gif

540 ms

verlaufrechts.gif

verlaufrechts.gif

540 ms

verlauflinksende.gif

verlauflinksende.gif

540 ms

verlaufrechtsende.gif

verlaufrechtsende.gif

541 ms

disclaimer-r.gif

disclaimer-r.gif

118 ms

periodensystem-r.gif

periodensystem-r.gif

115 ms

sicherheitscheck-r.gif

sicherheitscheck-r.gif

121 ms

suche-r.gif

suche-r.gif

100 ms

vdm-stern2.jpg

vdm-stern2.jpg

91 ms

Accessibility Review

experimentalchemie.de accessibility score

48

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.

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Best Practices

experimentalchemie.de best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

experimentalchemie.de SEO score

69

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Experimentalchemie.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 Experimentalchemie.de main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

experimentalchemie.de

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