Tools & Wizards About Us
congstar.de screenshot

Report Summary

  • 6

    Performance

    Renders faster than
    21% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

congstar.de

congstar | Mobilfunk | Smartphones | 5G | Festnetz- und Handytarife

Page Load Speed

124.6 sec in total

First Response

908 ms

Resources Loaded

67.8 sec

Page Rendered

55.9 sec

congstar.de screenshot

About Website

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

Mobilfunkanbieter des Jahres und zwar nicht ohne Grund ✔ Günstig ✔ Fair ✔ Verträge mit und ohne Laufzeit ✔ 5G Option zum Surfen mit bis zu 50Mbit/s!

Visit congstar.de

Key Findings

We analyzed Congstar.de page load time and found that the first response time was 908 ms and then it took 123.7 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 18 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

congstar.de performance score

6

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value20.8 s

0/100

25%

SI (Speed Index)

Value11.3 s

5/100

10%

TBT (Total Blocking Time)

Value12,180 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.344

32/100

15%

TTI (Time to Interactive)

Value31.7 s

0/100

10%

Network Requests Diagram

congstar.de

908 ms

www.congstar.de

1485 ms

merged-5181fe82a88c25ec33763fb5dca34691.css

3488 ms

merged-54fcf685b9900c8e946ca385de8cb9cd.css

3135 ms

jquery.min.js

1769 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 9% of them (7 requests) were addressed to the original Congstar.de, 20% (16 requests) were made to Media3.congstar-media.de and 9% (7 requests) were made to Media2.congstar-media.de. The less responsive or slowest element that took the longest time to load (26.8 sec) relates to the external source Sp.analytics.yahoo.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.9 MB (34%)

Content Size

5.6 MB

After Optimization

3.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Congstar.de main page is 5.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 65% of websites need less resources to load. Images take 3.3 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 213.8 kB

  • Original 248.2 kB
  • After minification 222.3 kB
  • After compression 34.5 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 213.8 kB or 86% of the original size.

Image Optimization

-4%

Potential reduce by 141.4 kB

  • Original 3.3 MB
  • After minification 3.2 MB

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. Congstar images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 526.5 kB

  • Original 733.5 kB
  • After minification 675.3 kB
  • After compression 207.0 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 526.5 kB or 72% of the original size.

CSS Optimization

-75%

Potential reduce by 1.0 MB

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 329.3 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. Congstar.de needs all CSS files to be minified and compressed as it can save up to 1.0 MB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (52%)

Requests Now

58

After Optimization

28

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Congstar. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

congstar.de

congstar.de

908 ms

www.congstar.de

www.congstar.de

1485 ms

merged-5181fe82a88c25ec33763fb5dca34691.css

merged-5181fe82a88c25ec33763fb5dca34691.css

3488 ms

merged-54fcf685b9900c8e946ca385de8cb9cd.css

merged-54fcf685b9900c8e946ca385de8cb9cd.css

3135 ms

jquery.min.js

jquery.min.js

1769 ms

document-register-element.js

document-register-element.js

1803 ms

merged-ca41020cfcb6052a2eb425d0f15b97cc.js

merged-ca41020cfcb6052a2eb425d0f15b97cc.js

3167 ms

merged-ff5b1fe03f94ac919279e0c60216ae0d.js

merged-ff5b1fe03f94ac919279e0c60216ae0d.js

3182 ms

custom.js

custom.js

3109 ms

merged-8a62eb64ef971ac25ade8b1ad03a8b20.js

merged-8a62eb64ef971ac25ade8b1ad03a8b20.js

4749 ms

merged-ef0ab8d8b15ec13061efd0dfe904433d.js

merged-ef0ab8d8b15ec13061efd0dfe904433d.js

3062 ms

home-buehne-10-jahre-congstar-sony-xperia-xa1-02.png

home-buehne-10-jahre-congstar-sony-xperia-xa1-02.png

2932 ms

blank.gif

blank.gif

9432 ms

tidal-musik-option-header-3.png

tidal-musik-option-header-3.png

3594 ms

gtm.js

gtm.js

3544 ms

logo_congstar_image.svg

logo_congstar_image.svg

1425 ms

logo_congstar_name.svg

logo_congstar_name.svg

2039 ms

plain

plain

9997 ms

home-buehne-10-jahre-congstar-sony-xperia-xa1-02.png

home-buehne-10-jahre-congstar-sony-xperia-xa1-02.png

15554 ms

tidal-musik-option-header-3.png

tidal-musik-option-header-3.png

7238 ms

ed91348a-d965-4bc4-a7bc-3d12ab0f9cfb-3.woff

ed91348a-d965-4bc4-a7bc-3d12ab0f9cfb-3.woff

3848 ms

86bef0b5-fa75-4ca3-8394-cb7b5a474a45-3.woff

86bef0b5-fa75-4ca3-8394-cb7b5a474a45-3.woff

7190 ms

CongstarFont.woff

CongstarFont.woff

8833 ms

icomoon.woff

icomoon.woff

7190 ms

init.js

init.js

15054 ms

benefits_sicher.svg

benefits_sicher.svg

3306 ms

benefits_finanzierung.svg

benefits_finanzierung.svg

3554 ms

benefits_schnell.svg

benefits_schnell.svg

6032 ms

benefits_rueckgabe.svg

benefits_rueckgabe.svg

7475 ms

logo_stpauli.svg

logo_stpauli.svg

8714 ms

logo_facebook.svg

logo_facebook.svg

8476 ms

logo_twitter.svg

logo_twitter.svg

8658 ms

logo_googleplus.svg

logo_googleplus.svg

8659 ms

logo_youtube.svg

logo_youtube.svg

8391 ms

logo_instagram.png

logo_instagram.png

8643 ms

analytics.js

analytics.js

11972 ms

genjscode.aspx

genjscode.aspx

12985 ms

activityi;src=4395928;type=ulip-0;cat=userl0;u15=undefined;ord=727361085568;~oref=https%3A%2F%2Fwww.congstar.de%2F

activityi;src=4395928;type=ulip-0;cat=userl0;u15=undefined;ord=727361085568;~oref=https%3A%2F%2Fwww.congstar.de%2F

10640 ms

conversion_async.js

conversion_async.js

20099 ms

tag.js

tag.js

0 ms

proactive.aspx

proactive.aspx

21398 ms

zanox.js

zanox.js

21397 ms

param.aspx

param.aspx

21423 ms

gfk_telekom_onexit.deu.min.js

gfk_telekom_onexit.deu.min.js

7095 ms

fbds.js

fbds.js

16615 ms

iframe_api

iframe_api

17314 ms

affadvc.aspx

affadvc.aspx

21105 ms

clippy__avatar.png

clippy__avatar.png

6387 ms

top-device-teasers

top-device-teasers

2063 ms

plan-teasers

plan-teasers

11275 ms

plan-teasers

plan-teasers

15283 ms

dots-bg.png

dots-bg.png

5676 ms

XD26E745AE43067B35326C90037A8D917.js

XD26E745AE43067B35326C90037A8D917.js

0 ms

activityi;src=4395928;type=Homez0;cat=Homep0;u15=undefined;u2=homepage;u1=1064331759;u19=undefined;u18=0;ord=8170501186163;~oref=https%3A%2F%2Fwww.congstar.de%2F

activityi;src=4395928;type=Homez0;cat=Homep0;u15=undefined;u2=homepage;u1=1064331759;u19=undefined;u18=0;ord=8170501186163;~oref=https%3A%2F%2Fwww.congstar.de%2F

10310 ms

cx.client.min.js

cx.client.min.js

12217 ms

ec.js

ec.js

13050 ms

handy-placeholder.svg

handy-placeholder.svg

8977 ms

portalsettings.js

portalsettings.js

8439 ms

epcd.min.js

epcd.min.js

10884 ms

swipe_dot_aktiv.svg

swipe_dot_aktiv.svg

8609 ms

swipe_dot_inaktiv.svg

swipe_dot_inaktiv.svg

10624 ms

spp.pl

spp.pl

26795 ms

rt

rt

26795 ms

rt

rt

26795 ms

rt

rt

26795 ms

rt

rt

26794 ms

js

js

23035 ms

pixel

pixel

23011 ms

src=6955711;type=invmedia;cat=xqeb3cn1;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1

src=6955711;type=invmedia;cat=xqeb3cn1;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1

22874 ms

20684 ms

www-widgetapi.js

www-widgetapi.js

20549 ms

20546 ms

onLoad

onLoad

20272 ms

portaldetection.js

portaldetection.js

19507 ms

capture-apps-5.0.0.js

capture-apps-5.0.0.js

18893 ms

collect

collect

18373 ms

collect

collect

19428 ms

piwik.php

piwik.php

18358 ms

iframeStorage-5.0.0.html

iframeStorage-5.0.0.html

172 ms

appsmanagerinit

appsmanagerinit

712 ms

ifs-5.0.0.js

ifs-5.0.0.js

14 ms

28F92664-62B3-4A2C-8996-124E1076757F

28F92664-62B3-4A2C-8996-124E1076757F

930 ms

Accessibility Review

congstar.de accessibility score

80

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-hidden="true"] elements contain focusable descendents

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

congstar.de best practices score

67

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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

congstar.de SEO score

86

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

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 Congstar.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 Congstar.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

congstar.de

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