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catlux.de screenshot

Report Summary

  • 56

    Performance

    Renders faster than
    73% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

catlux.de

Catlux – das Original | Schulaufgaben, Proben & Lernzielkontrollen

Page Load Speed

2.5 sec in total

First Response

343 ms

Resources Loaded

1.9 sec

Page Rendered

194 ms

catlux.de screenshot

About Website

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

Übungen & Aufgaben mit Lösungen für Grundschule, Gymnasium, Realschule und Mittelschule. ✓Spezialisiert auf Bayern. ✓Einfach herunterladen

Visit catlux.de

Key Findings

We analyzed Catlux.de page load time and found that the first response time was 343 ms and then it took 2.1 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

catlux.de performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.7 s

5/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

5/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.011

100/100

15%

TTI (Time to Interactive)

Value6.9 s

54/100

10%

Network Requests Diagram

catlux.de

343 ms

www.catlux.de

317 ms

home.html

298 ms

css

24 ms

jquery-1.11.2.min.js

518 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 68% of them (26 requests) were addressed to the original Catlux.de, 8% (3 requests) were made to Google-analytics.com and 5% (2 requests) were made to Dev.visualwebsiteoptimizer.com. The less responsive or slowest element that took the longest time to load (557 ms) belongs to the original domain Catlux.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 305.5 kB (38%)

Content Size

802.4 kB

After Optimization

496.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Catlux.de main page is 802.4 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 418.4 kB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 148.2 kB

  • Original 162.9 kB
  • After minification 161.3 kB
  • After compression 14.7 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 148.2 kB or 91% of the original size.

Image Optimization

-1%

Potential reduce by 5.4 kB

  • Original 418.4 kB
  • After minification 413.0 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. Catlux images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 112.7 kB

  • Original 175.0 kB
  • After minification 167.3 kB
  • After compression 62.4 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 112.7 kB or 64% of the original size.

CSS Optimization

-85%

Potential reduce by 39.3 kB

  • Original 46.1 kB
  • After minification 34.5 kB
  • After compression 6.9 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. Catlux.de needs all CSS files to be minified and compressed as it can save up to 39.3 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (58%)

Requests Now

33

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Catlux. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

catlux.de

catlux.de

343 ms

www.catlux.de

www.catlux.de

317 ms

home.html

home.html

298 ms

css

css

24 ms

jquery-1.11.2.min.js

jquery-1.11.2.min.js

518 ms

jquery-migrate-1.2.1.min.js

jquery-migrate-1.2.1.min.js

290 ms

superfish.js

superfish.js

291 ms

supersubs.js

supersubs.js

197 ms

hoverIntent.js

hoverIntent.js

200 ms

unslider.min.js

unslider.min.js

281 ms

buttons.css

buttons.css

212 ms

style.css

style.css

311 ms

superfish.css

superfish.css

290 ms

fbevents.js

fbevents.js

391 ms

j.php

j.php

15 ms

catluxlogo.gif

catluxlogo.gif

388 ms

catlux_10jahre_online.png

catlux_10jahre_online.png

390 ms

von-lehrkraeften-getestet.png

von-lehrkraeften-getestet.png

392 ms

Bannerschwarz.gif

Bannerschwarz.gif

390 ms

Facebook.png

Facebook.png

388 ms

Twitter.png

Twitter.png

387 ms

Google.png

Google.png

390 ms

gtm.js

gtm.js

385 ms

Schulaufgabe_Englisch.gif

Schulaufgabe_Englisch.gif

384 ms

Musteraufsatzvorgangsbeschreibung.jpg

Musteraufsatzvorgangsbeschreibung.jpg

474 ms

Catlux_Facebook_neu.gif

Catlux_Facebook_neu.gif

404 ms

Mathematikschulaufgabe_Klasse_5.png

Mathematikschulaufgabe_Klasse_5.png

385 ms

catlux-danke1500.png

catlux-danke1500.png

557 ms

Probeunterricht_Gymnasium_Mathematik.png

Probeunterricht_Gymnasium_Mathematik.png

475 ms

7WQiMJKp1Jo3CiUw302zGA.woff

7WQiMJKp1Jo3CiUw302zGA.woff

35 ms

v.gif

v.gif

12 ms

23 ms

analytics.js

analytics.js

31 ms

bg.jpg

bg.jpg

197 ms

linkid.js

linkid.js

11 ms

collect

collect

10 ms

collect

collect

54 ms

ga-audiences

ga-audiences

39 ms

Accessibility Review

catlux.de accessibility score

61

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

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

catlux.de best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

catlux.de SEO score

83

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

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

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

    N/A

  • Encoding

    UTF-8

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

catlux.de

Open Graph data is detected on the main page of Catlux. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: