Report Summary

  • 94

    Performance

    Renders faster than
    93% of other websites

  • 54

    Accessibility

    Visual factors better than
    that of 22% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

wasser-wissen.de

Wasser-Wissen - Das Internetportal für Wasser und Abwasser

Page Load Speed

1.2 sec in total

First Response

375 ms

Resources Loaded

695 ms

Page Rendered

152 ms

wasser-wissen.de screenshot

About Website

Visit wasser-wissen.de now to see the best up-to-date Wasser Wissen content for Germany and also check out these interesting facts you probably never knew about wasser-wissen.de

Wasser und Abwasser - Lexikon, Nachrichten, Diskussions-Forum, Wasser-Wissen-International, Veranstaltungskalender Newsletter u.v.a.m.

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Key Findings

We analyzed Wasser-wissen.de page load time and found that the first response time was 375 ms and then it took 847 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

wasser-wissen.de performance score

94

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.7 s

99/100

25%

SI (Speed Index)

Value1.6 s

100/100

10%

TBT (Total Blocking Time)

Value280 ms

81/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.3 s

100/100

10%

Network Requests Diagram

wasser-wissen.de

375 ms

iuv-1011.css

201 ms

kopf-Grafik.gif

293 ms

unter_Kopf-Grafik_neu-2.gif

207 ms

recherchedienst.gif

204 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that all of those requests were addressed to Wasser-wissen.de and no external sources were called. The less responsive or slowest element that took the longest time to load (375 ms) belongs to the original domain Wasser-wissen.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 28.2 kB (78%)

Content Size

36.1 kB

After Optimization

7.9 kB

In fact, the total size of Wasser-wissen.de main page is 36.1 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. HTML takes 25.2 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 22.0 kB

  • Original 25.2 kB
  • After minification 19.6 kB
  • After compression 3.2 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 5.6 kB, which is 22% 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 22.0 kB or 87% of the original size.

Image Optimization

-22%

Potential reduce by 1.0 kB

  • Original 4.9 kB
  • After minification 3.8 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, Wasser Wissen needs image optimization as it can save up to 1.0 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-86%

Potential reduce by 5.1 kB

  • Original 6.0 kB
  • After minification 4.3 kB
  • After compression 848 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. Wasser-wissen.de needs all CSS files to be minified and compressed as it can save up to 5.1 kB or 86% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

13

After Optimization

13

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Wasser Wissen. According to our analytics all requests are already optimized.

Accessibility Review

wasser-wissen.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

wasser-wissen.de best practices score

67

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

wasser-wissen.de SEO score

67

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

    DE

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Wasser-wissen.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 Wasser-wissen.de main page’s claimed encoding is iso-8859-1. 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 Wasser Wissen. 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: