Report Summary

  • 85

    Performance

    Renders faster than
    89% of other websites

  • 54

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

luftdicht.de

Raumklima-Untersuchungen, Lüftungslogger-System

Page Load Speed

3 sec in total

First Response

560 ms

Resources Loaded

1.8 sec

Page Rendered

587 ms

luftdicht.de screenshot

About Website

Welcome to luftdicht.de homepage info - get ready to check Luftdicht best content for Germany right away, or after learning these important things about luftdicht.de

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Key Findings

We analyzed Luftdicht.de page load time and found that the first response time was 560 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

luftdicht.de performance score

85

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

93/100

10%

LCP (Largest Contentful Paint)

Value1.6 s

99/100

25%

SI (Speed Index)

Value2.2 s

99/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.874

4/100

15%

TTI (Time to Interactive)

Value1.7 s

100/100

10%

Network Requests Diagram

luftdicht.de

560 ms

xaramenu.js

198 ms

menue.js

514 ms

wz_tooltip.js

510 ms

hintergrund.jpg

206 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 98% of them (46 requests) were addressed to the original Luftdicht.de, 2% (1 request) were made to Luftdicht-forum.de. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Luftdicht.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 254.5 kB (27%)

Content Size

948.0 kB

After Optimization

693.5 kB

In fact, the total size of Luftdicht.de main page is 948.0 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. 35% of websites need less resources to load. Images take 803.6 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 62.5 kB

  • Original 73.4 kB
  • After minification 66.0 kB
  • After compression 11.0 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 62.5 kB or 85% of the original size.

Image Optimization

-17%

Potential reduce by 135.4 kB

  • Original 803.6 kB
  • After minification 668.3 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. Obviously, Luftdicht needs image optimization as it can save up to 135.4 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-80%

Potential reduce by 56.7 kB

  • Original 71.0 kB
  • After minification 55.3 kB
  • After compression 14.3 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 56.7 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (42%)

Requests Now

45

After Optimization

26

The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Luftdicht. 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.

Accessibility Review

luftdicht.de accessibility score

54

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

Links do not have a discernible name

Best Practices

luftdicht.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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

luftdicht.de SEO score

58

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-8859-15

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Luftdicht.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 Luftdicht.de main page’s claimed encoding is iso-8859-15. 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 Luftdicht. 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: