Tools & Wizards About Us
chemie.uni-osnabrueck.de screenshot

Report Summary

  • 72

    Performance

    Renders faster than
    82% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 91

    SEO

    Google-friendlier than
    71% of websites

chemie.uni-osnabrueck.de

Startseite - Chemie

Page Load Speed

6.4 sec in total

First Response

305 ms

Resources Loaded

5.9 sec

Page Rendered

189 ms

chemie.uni-osnabrueck.de screenshot

About Website

Visit chemie.uni-osnabrueck.de now to see the best up-to-date Chemie Uni Osnabrueck content for Germany and also check out these interesting facts you probably never knew about chemie.uni-osnabrueck.de

Universität Osnabrück

Visit chemie.uni-osnabrueck.de

Key Findings

We analyzed Chemie.uni-osnabrueck.de page load time and found that the first response time was 305 ms and then it took 6.1 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

chemie.uni-osnabrueck.de performance score

72

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

76/100

25%

SI (Speed Index)

Value5.8 s

49/100

10%

TBT (Total Blocking Time)

Value450 ms

62/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.3 s

85/100

10%

Network Requests Diagram

chemie.uni-osnabrueck.de

305 ms

ifc.html

2570 ms

stylesheet_bcd352657f.css

104 ms

css_chemie.css

201 ms

main.1376306220.js

327 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 98% of them (42 requests) were addressed to the original Chemie.uni-osnabrueck.de, 2% (1 request) were made to Analytics.rz.uni-osnabrueck.de. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Chemie.uni-osnabrueck.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 332.8 kB (23%)

Content Size

1.5 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemie.uni-osnabrueck.de main page is 1.5 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. 30% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 26.5 kB

  • Original 31.2 kB
  • After minification 23.7 kB
  • After compression 4.6 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 7.5 kB, which is 24% 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 26.5 kB or 85% of the original size.

Image Optimization

-4%

Potential reduce by 39.1 kB

  • Original 1.1 MB
  • After minification 1.0 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. Chemie Uni Osnabrueck images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 137.6 kB

  • Original 198.8 kB
  • After minification 184.6 kB
  • After compression 61.2 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 137.6 kB or 69% of the original size.

CSS Optimization

-86%

Potential reduce by 129.6 kB

  • Original 150.8 kB
  • After minification 118.4 kB
  • After compression 21.1 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. Chemie.uni-osnabrueck.de needs all CSS files to be minified and compressed as it can save up to 129.6 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (41%)

Requests Now

41

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemie Uni Osnabrueck. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chemie.uni-osnabrueck.de

chemie.uni-osnabrueck.de

305 ms

ifc.html

ifc.html

2570 ms

stylesheet_bcd352657f.css

stylesheet_bcd352657f.css

104 ms

css_chemie.css

css_chemie.css

201 ms

main.1376306220.js

main.1376306220.js

327 ms

behaviour.1376306220.js

behaviour.1376306220.js

205 ms

visual.1376306220.css

visual.1376306220.css

207 ms

basics.1376306220.css

basics.1376306220.css

210 ms

content.1376306220.css

content.1376306220.css

315 ms

safari.1376306220.css

safari.1376306220.css

300 ms

googlesearch.css

googlesearch.css

305 ms

docbehaviour.1376306220.js

docbehaviour.1376306220.js

310 ms

header_logo.gif

header_logo.gif

110 ms

button_search.gif

button_search.gif

112 ms

icons_link.gif

icons_link.gif

112 ms

home_active.gif

home_active.gif

113 ms

bg_flyout.png

bg_flyout.png

114 ms

bg_headline.gif

bg_headline.gif

113 ms

Chemie_Tag_01.png

Chemie_Tag_01.png

1288 ms

error_ab_h3.gif

error_ab_h3.gif

211 ms

icons_navservice.gif

icons_navservice.gif

214 ms

icon_close.png

icon_close.png

212 ms

a70da5a4c6.png

a70da5a4c6.png

321 ms

icon_imagelink.png

icon_imagelink.png

211 ms

Reuter_02.png

Reuter_02.png

446 ms

Beginn_02.png

Beginn_02.png

412 ms

Walder_02.png

Walder_02.png

411 ms

bbfed193ba.png

bbfed193ba.png

413 ms

e8a1e3f032.png

e8a1e3f032.png

424 ms

DSC_0227_160.jpg

DSC_0227_160.jpg

610 ms

Unibibliothek_01.gif

Unibibliothek_01.gif

515 ms

Stud.IP.gif

Stud.IP.gif

515 ms

Lageplaene.gif

Lageplaene.gif

562 ms

Rechenzentrum.gif

Rechenzentrum.gif

561 ms

zepros.gif

zepros.gif

616 ms

Webmail.gif

Webmail.gif

616 ms

footer_totop.png

footer_totop.png

624 ms

piwik.js

piwik.js

496 ms

metaplus-roman-webfont.woff

metaplus-roman-webfont.woff

721 ms

metaplus-bold-roman-webfont.woff

metaplus-bold-roman-webfont.woff

687 ms

footer_print.png

footer_print.png

162 ms

sticky_d.png

sticky_d.png

163 ms

icons_rightlink.gif

icons_rightlink.gif

171 ms

Accessibility Review

chemie.uni-osnabrueck.de accessibility score

80

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

chemie.uni-osnabrueck.de best practices score

75

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

chemie.uni-osnabrueck.de SEO score

91

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

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

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemie.uni-osnabrueck.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Chemie.uni-osnabrueck.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

chemie.uni-osnabrueck.de

Open Graph description is not detected on the main page of Chemie Uni Osnabrueck. 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: