Tools & Wizards About Us
astroviewer.de screenshot

Report Summary

  • 96

    Performance

    Renders faster than
    94% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

astroviewer.de

Planeten und Sternbilder am Sternenhimmel finden - AstroViewer-Sternenkarte

Page Load Speed

2.7 sec in total

First Response

525 ms

Resources Loaded

2 sec

Page Rendered

235 ms

astroviewer.de screenshot

About Website

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

Planeten, Sterne und Sternbilder einfach und schnell am Sternenhimmel finden mit der AstroViewer-Sternenkarte

Visit astroviewer.de

Key Findings

We analyzed Astroviewer.de page load time and found that the first response time was 525 ms and then it took 2.2 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

astroviewer.de performance score

96

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

79/100

10%

LCP (Largest Contentful Paint)

Value2.2 s

95/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.2 s

99/100

10%

Network Requests Diagram

index.php

525 ms

location.js

100 ms

normalise.css

205 ms

av.css

287 ms

av-logo3.gif

236 ms

Our browser made a total of 7 requests to load all elements on the main page. We found that all of those requests were addressed to Astroviewer.de and no external sources were called. The less responsive or slowest element that took the longest time to load (548 ms) relates to the external source Astroviewer.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 12.8 kB (24%)

Content Size

53.3 kB

After Optimization

40.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Astroviewer.de main page is 53.3 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. Images take 37.9 kB which makes up the majority of the site volume.

HTML Optimization

-62%

Potential reduce by 2.5 kB

  • Original 4.0 kB
  • After minification 3.8 kB
  • After compression 1.5 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 2.5 kB or 62% of the original size.

Image Optimization

-3%

Potential reduce by 1.0 kB

  • Original 37.9 kB
  • After minification 36.9 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. Astro Viewer images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 1.2 kB

  • Original 1.9 kB
  • After minification 1.5 kB
  • After compression 684 B

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 1.2 kB or 64% of the original size.

CSS Optimization

-85%

Potential reduce by 8.1 kB

  • Original 9.5 kB
  • After minification 3.4 kB
  • After compression 1.5 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. Astroviewer.de needs all CSS files to be minified and compressed as it can save up to 8.1 kB or 85% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

  • Images
  • JavaScript
  • CSS

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Astro Viewer. According to our analytics all requests are already optimized.

Network Requests Diagram

index.php

index.php

525 ms

location.js

location.js

100 ms

normalise.css

normalise.css

205 ms

av.css

av.css

287 ms

av-logo3.gif

av-logo3.gif

236 ms

skymap.php

skymap.php

548 ms

xrayback_chandra.gif

xrayback_chandra.gif

103 ms

Accessibility Review

astroviewer.de accessibility score

100

Accessibility Issues

Best Practices

astroviewer.de best practices score

83

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

SEO Factors

astroviewer.de SEO score

97

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

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Astroviewer.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 Astroviewer.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

astroviewer.de

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