Tools & Wizards About Us
izmb.uni-bonn.de screenshot

Report Summary

  • 54

    Performance

    Renders faster than
    72% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

izmb.uni-bonn.de

Homepage — izmb.en

Page Load Speed

1.9 sec in total

First Response

399 ms

Resources Loaded

1.3 sec

Page Rendered

152 ms

izmb.uni-bonn.de screenshot

About Website

Welcome to izmb.uni-bonn.de homepage info - get ready to check Izmb Uni Bonn best content for Germany right away, or after learning these important things about izmb.uni-bonn.de

IZMB - Institut für zelluläre und Molekulare Botanik der Uni Bonn

Visit izmb.uni-bonn.de

Key Findings

We analyzed Izmb.uni-bonn.de page load time and found that the first response time was 399 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

izmb.uni-bonn.de performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.4 s

2/100

10%

LCP (Largest Contentful Paint)

Value6.5 s

9/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.035

100/100

15%

TTI (Time to Interactive)

Value6.4 s

59/100

10%

Network Requests Diagram

izmb.uni-bonn.de

399 ms

www.izmb.uni-bonn.de

302 ms

izmb.css

99 ms

banner_8_80x15.png

101 ms

izmb-logo.jpg

100 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that 89% of them (16 requests) were addressed to the original Izmb.uni-bonn.de, 11% (2 requests) were made to Paessler.com. The less responsive or slowest element that took the longest time to load (493 ms) belongs to the original domain Izmb.uni-bonn.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 29.5 kB (15%)

Content Size

197.1 kB

After Optimization

167.6 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Izmb.uni-bonn.de main page is 197.1 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. Only 10% of websites need less resources to load. Images take 183.9 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 9.7 kB

  • Original 11.9 kB
  • After minification 9.1 kB
  • After compression 2.2 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. This page needs HTML code to be minified as it can gain 2.8 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 9.7 kB or 81% of the original size.

Image Optimization

-10%

Potential reduce by 19.1 kB

  • Original 183.9 kB
  • After minification 164.9 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. Izmb Uni Bonn images are well optimized though.

CSS Optimization

-64%

Potential reduce by 774 B

  • Original 1.2 kB
  • After minification 906 B
  • After compression 443 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. Izmb.uni-bonn.de needs all CSS files to be minified and compressed as it can save up to 774 B or 64% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

14

After Optimization

14

  • Images
  • CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Izmb Uni Bonn. According to our analytics all requests are already optimized.

Network Requests Diagram

izmb.uni-bonn.de

izmb.uni-bonn.de

399 ms

www.izmb.uni-bonn.de

www.izmb.uni-bonn.de

302 ms

izmb.css

izmb.css

99 ms

banner_8_80x15.png

banner_8_80x15.png

101 ms

izmb-logo.jpg

izmb-logo.jpg

100 ms

logo_uni_bonn_www.gif

logo_uni_bonn_www.gif

197 ms

zellbio-bunt.jpg

zellbio-bunt.jpg

198 ms

oekophys-bunt.jpg

oekophys-bunt.jpg

197 ms

molevol-bunt.jpg

molevol-bunt.jpg

198 ms

theobio-bunt.jpg

theobio-bunt.jpg

198 ms

molbio-bunt.jpg

molbio-bunt.jpg

493 ms

uelker-bunt.jpg

uelker-bunt.jpg

292 ms

plantmaster-bunt.jpg

plantmaster-bunt.jpg

389 ms

elabor-bunt.jpg

elabor-bunt.jpg

293 ms

agvolkmann-bunt.jpg

agvolkmann-bunt.jpg

294 ms

barrow.gif

barrow.gif

293 ms

pdf.gif

pdf.gif

389 ms

banner_8_80x15.png

banner_8_80x15.png

300 ms

Accessibility Review

izmb.uni-bonn.de accessibility score

65

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

izmb.uni-bonn.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

izmb.uni-bonn.de SEO score

73

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

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Izmb.uni-bonn.de can be misinterpreted by Google and other search engines. Our service has detected that English 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 Izmb.uni-bonn.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

izmb.uni-bonn.de

Open Graph description is not detected on the main page of Izmb Uni Bonn. 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: