Report Summary

  • 68

    Performance

    Renders faster than
    81% of other websites

  • 53

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

wolkenatlas.de

Der Karlsruher Wolkenatlas - Wolken und Wetter - Fotografie

Page Load Speed

25.9 sec in total

First Response

2.1 sec

Resources Loaded

23 sec

Page Rendered

819 ms

wolkenatlas.de screenshot

About Website

Welcome to wolkenatlas.de homepage info - get ready to check Wolkenatlas best content right away, or after learning these important things about wolkenatlas.de

Der Karlsruher Wolkenatlas - Übersicht, Wolken - und Wetterfotografie Beschreibung der verschiedenen Wolkenarten, optischer und anderer Wetterphänomene sowie der Niederschlagsformen anhand von Fotos u...

Visit wolkenatlas.de

Key Findings

We analyzed Wolkenatlas.de page load time and found that the first response time was 2.1 sec and then it took 23.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 4 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

wolkenatlas.de performance score

68

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.1 s

99/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

91/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value770 ms

38/100

30%

CLS (Cumulative Layout Shift)

Value0.169

70/100

15%

TTI (Time to Interactive)

Value8.1 s

41/100

10%

Network Requests Diagram

wolkenatlas.de

2072 ms

webt03.gif

257 ms

back02.jpg

258 ms

tlogo03.gif

722 ms

brand

74 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that 31% of them (15 requests) were addressed to the original Wolkenatlas.de, 15% (7 requests) were made to Pagead2.googlesyndication.com and 10% (5 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (20.4 sec) relates to the external source Banner.adlive.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 32.9 kB (30%)

Content Size

109.0 kB

After Optimization

76.2 kB

In fact, the total size of Wolkenatlas.de main page is 109.0 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. 30% of websites need less resources to load. Images take 62.2 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 14.9 kB

  • Original 19.7 kB
  • After minification 19.4 kB
  • After compression 4.8 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 14.9 kB or 76% of the original size.

Image Optimization

-3%

Potential reduce by 1.8 kB

  • Original 62.2 kB
  • After minification 60.4 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. Wolkenatlas images are well optimized though.

JavaScript Optimization

-60%

Potential reduce by 16.2 kB

  • Original 27.1 kB
  • After minification 26.9 kB
  • After compression 10.9 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 16.2 kB or 60% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (33%)

Requests Now

39

After Optimization

26

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Wolkenatlas. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

wolkenatlas.de accessibility score

53

Accessibility Issues

ARIA

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.

Impact

Issue

High

[aria-*] attributes do not match their roles

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.

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

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

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

Best Practices

wolkenatlas.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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

wolkenatlas.de SEO score

62

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

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Wolkenatlas.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 Wolkenatlas.de main page’s claimed encoding is . 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

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